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INSTRUCTION MANUAL

144MHz FM TRANSCEIVER

TH-K2AT
TH-K2E
TH-K2ET

430MHz FM TRANSCEIVER

TH-K4AT
TH-K4E

.
NOTICE TO THE USER

NOTICE TO THE USER

FCC WARNING

This equipment generates or uses radio frequency energy. Changes
or modifications to this equipment may cause harmful interference
unless the modifications are expressly approved in the instruction
manual. The user could lose the authority to operate this equipment
if an unauthorized change or modification is made.

INFORMATION TO THE DIGITAL DEVICE USER REQUIRED BY
THE FCC

This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference in a residential installation.

This equipment generates, uses and can generate radio frequency
energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio
communications. However, there is no guarantee that the
interference will not occur in a particular installation. If this equipment
does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of
the following measures:

•
Reorient or relocate the receiving antenna.
•
Increase the separation between the equipment and receiver.
•
Connect the equipment to an outlet on a circuit different from that
to which the receiver is connected.
•
Consult the dealer for technical assistance.
.
MODELS COVERED BY THIS MANUAL

MODELS COVERED BY THIS MANUAL

TH-K2AT, TH-K2E, TH-K2ET
TH-K4AT, TH-K4E

MARKET CODES

Kn: The Americas
En: Europe
Mn: General
(Where n represents a variation number.)

The market code is printed on the bar-code label of the

carton box.
Refer to the product specifications {pages 122 ~ 133}
for information on the available operating frequencies
within each model. For accessories supplied with each
model, refer to pages vii ~ ix.

.
PRECAUTIONS

PRECAUTIONS

•
Do not transmit with high output power for extended
periods. The transceiver may overheat.
•
Do not modify this transceiver unless instructed by
this manual or by KENWOOD documentation.
•
When using a regulated power supply, connect the
specified DC cable (option) to the DC IN jack on the
transceiver. The supply voltage must be between
12 V and 16 V to prevent damaging the transceiver.
•
When connecting the transceiver to a cigarette
lighter socket in a vehicle, use the specified cigarette
lighter cable (option).
•
Do not expose the transceiver to long periods of
direct sunlight nor place it close to heating
appliances.
•
Do not place the transceiver in excessively dusty,
humid, or wet areas, nor on unstable surfaces.
•
If an abnormal odor or smoke is detected coming
from the transceiver, turn OFF the power
immediately and remove the battery case or the
battery pack from the transceiver. Contact your
authorized KENWOOD dealer, customer service, or
service station.
.
NOTICE TO THE USER
MODELS COVERED BY THIS MANUAL
MARKET CODES
PRECAUTIONS
CONTENTS ................................................................... i
THANK YOU .................................................................... vi
FEATURES ...................................................................... vi
SUPPLIED ACCESSORIES ....................................................... vii
WRITING CONVENTIONS FOLLOWED ............................................. x
PREPARATION ............................................................. 1
INSTALLING THE PB-43N NI-MH BATTERY PACK ......................... 1
INSTALLING ALKALINE BATTERIES .......................................... 2
INSTALLING THE ANTENNA ................................................. 4
ATTACHING THE HAND STRAP (OTHER THAN TH-K2AT K/ K2) ............ 4
INSTALLING THE BELT CLIP ................................................ 5
CHARGING THE PB-43N NI-MH BATTERY PACK
(OTHER THAN TH-K2AT K2/ M2, TH-K4AT M2) ...................... 6
CONNECTING TO A CIGARETTE LIGHTER SOCKET ............................ 8
CONNECTING TO A REGULATED POWER SUPPLY ............................. 9
YOUR FIRST QSO ........................................................ 10
FIRST QSO ............................................................. 10
GETTING ACQUAINTED .................................................. 12
KEYS AND CONTROLS .................................................... 12
DISPLAY ................................................................. 14
BASIC OPERATION ........................................................ 17
Switching the Power ON/OFF ................................ 17
Adjusting the Volume ......................................... 17
Adjusting the Squelch ......................................... 18
Transmitting ..................................................... 19
Selecting an Output Power .............................. 19
Selecting a Frequency ........................................ 20
VFO Mode .................................................. 20
MHz Mode .................................................. 20
Direct Frequency Entry
(TH-K2AT/ET/K4AT only) ................................. 21
CONTENTS
NOTICE TO THE USER
MODELS COVERED BY THIS MANUAL
MARKET CODES
PRECAUTIONS
CONTENTS ................................................................... i
THANK YOU .................................................................... vi
FEATURES ...................................................................... vi
SUPPLIED ACCESSORIES ....................................................... vii
WRITING CONVENTIONS FOLLOWED ............................................. x
PREPARATION ............................................................. 1
INSTALLING THE PB-43N NI-MH BATTERY PACK ......................... 1
INSTALLING ALKALINE BATTERIES .......................................... 2
INSTALLING THE ANTENNA ................................................. 4
ATTACHING THE HAND STRAP (OTHER THAN TH-K2AT K/ K2) ............ 4
INSTALLING THE BELT CLIP ................................................ 5
CHARGING THE PB-43N NI-MH BATTERY PACK
(OTHER THAN TH-K2AT K2/ M2, TH-K4AT M2) ...................... 6
CONNECTING TO A CIGARETTE LIGHTER SOCKET ............................ 8
CONNECTING TO A REGULATED POWER SUPPLY ............................. 9
YOUR FIRST QSO ........................................................ 10
FIRST QSO ............................................................. 10
GETTING ACQUAINTED .................................................. 12
KEYS AND CONTROLS .................................................... 12
DISPLAY ................................................................. 14
BASIC OPERATION ........................................................ 17
Switching the Power ON/OFF ................................ 17
Adjusting the Volume ......................................... 17
Adjusting the Squelch ......................................... 18
Transmitting ..................................................... 19
Selecting an Output Power .............................. 19
Selecting a Frequency ........................................ 20
VFO Mode .................................................. 20
MHz Mode .................................................. 20
Direct Frequency Entry
(TH-K2AT/ET/K4AT only) ................................. 21
CONTENTS

.
MENU SETUP ............................................................. 24
WHAT IS A MENU? ...................................................... 24
MENU ACCESS ........................................................... 24
MENU FUNCTION LIST ................................................... 26
ALPHABETICAL FUNCTION LIST ............................................ 29
OPERATING THROUGH REPEATERS................................... 31
OFFSET PROGRAMMING FLOW ............................................ 32
Programming an Offset ....................................... 32
Selecting an Offset Direction ........................... 32
Selecting an Offset Frequency .......................... 33
Activating the Tone Function ............................ 34
Selecting a Tone Frequency ............................. 35
AUTOMATIC REPEATER OFFSET (TH-K2AT/ E/ ET ONLY) ................. 37
REVERSE FUNCTION ...................................................... 38
AUTOMATIC SIMPLEX CHECK (ASC) ...................................... 38
TONE FREQ. ID SCAN ................................................... 39
MEMORY CHANNELS .................................................... 41
NUMBER OF MEMORY CHANNELS ......................................... 41
SIMPLEX & REPEATER OR ODD-SPLIT MEMORY CHANNEL? ............... 42
Storing Simplex Frequencies or
Standard Repeater Frequencies ............................. 44
Storing Odd-Split Repeater Frequencies .................. 45
Recalling a Memory Channel ................................ 46
Using the Tuning Control ................................ 46
Using a Numeric Keypad
(TH-K2AT/ ET/ K4AT only) ................................ 46
CLEARING A MEMORY CHANNEL .......................................... 47
NAMING A MEMORY CHANNEL ............................................ 48
MEMORY CHANNEL TRANSFER ............................................ 50
Memory a VFO Transfer ..................................... 50
Channel a Channel Transfer ................................ 50
CALL CHANNEL .......................................................... 53
Recalling the Call Channel ................................... 53
Reprogramming the Call Channel ........................... 54
WEATHER ALERT (TH-K2AT K/ K2 ONLY) .............................. 55
Programming the Weather Radio Frequency ............. 55
MENU SETUP ............................................................. 24
WHAT IS A MENU? ...................................................... 24
MENU ACCESS ........................................................... 24
MENU FUNCTION LIST ................................................... 26
ALPHABETICAL FUNCTION LIST ............................................ 29
OPERATING THROUGH REPEATERS................................... 31
OFFSET PROGRAMMING FLOW ............................................ 32
Programming an Offset ....................................... 32
Selecting an Offset Direction ........................... 32
Selecting an Offset Frequency .......................... 33
Activating the Tone Function ............................ 34
Selecting a Tone Frequency ............................. 35
AUTOMATIC REPEATER OFFSET (TH-K2AT/ E/ ET ONLY) ................. 37
REVERSE FUNCTION ...................................................... 38
AUTOMATIC SIMPLEX CHECK (ASC) ...................................... 38
TONE FREQ. ID SCAN ................................................... 39
MEMORY CHANNELS .................................................... 41
NUMBER OF MEMORY CHANNELS ......................................... 41
SIMPLEX & REPEATER OR ODD-SPLIT MEMORY CHANNEL? ............... 42
Storing Simplex Frequencies or
Standard Repeater Frequencies ............................. 44
Storing Odd-Split Repeater Frequencies .................. 45
Recalling a Memory Channel ................................ 46
Using the Tuning Control ................................ 46
Using a Numeric Keypad
(TH-K2AT/ ET/ K4AT only) ................................ 46
CLEARING A MEMORY CHANNEL .......................................... 47
NAMING A MEMORY CHANNEL ............................................ 48
MEMORY CHANNEL TRANSFER ............................................ 50
Memory a VFO Transfer ..................................... 50
Channel a Channel Transfer ................................ 50
CALL CHANNEL .......................................................... 53
Recalling the Call Channel ................................... 53
Reprogramming the Call Channel ........................... 54
WEATHER ALERT (TH-K2AT K/ K2 ONLY) .............................. 55
Programming the Weather Radio Frequency ............. 55

.
Enabling a Weather Alert ..................................... 56
CHANNEL DISPLAY ....................................................... 57
SCAN ....................................................................... 59
NORMAL SCAN ........................................................... 60
Band Scan ....................................................... 60
Program Scan ................................................... 61
Storing a Program Scan Frequency Range ........... 61
Performing Program Scan ............................... 62
MEMORY SCAN .......................................................... 63
All-Channel Scan ............................................... 63
CALL SCAN .............................................................. 64
PRIORITY SCAN .......................................................... 65
Programming Priority Channels ............................. 65
Using Priority Scan ............................................ 65
MEMORY CHANNEL LOCKOUT ............................................. 67
SCAN RESUME METHOD .................................................. 68
SELECTIVE CALL ......................................................... 69
CTCSS AND DCS ...................................................... 69
CTCSS ................................................................. 69
Using CTCSS .................................................... 69
Selecting a CTCSS Frequency ............................... 70
CTCSS Freq. ID Scan .......................................... 72
DCS .................................................................... 73
Using DCS ....................................................... 73
Selecting a DCS Code ......................................... 74
DCS Code ID Scan ............................................. 75
DTMF FUNCTIONS ....................................................... 76
MANUAL DIALING (TH-K2AT/ ET/ K4AT ONLY) ........................ 76
DTMF TX Hold (TH-K2AT/ ET/ K4AT only) .................. 77
AUTOMATIC DIALER ...................................................... 77
Storing a DTMF Number in Memory ........................ 77
Transmitting a Stored DTMF Number ....................... 79
Adjusting the DTMF Tone Transmission Speed ........... 80
Adjusting the Pause Duration ................................ 80
DTMF KEY LOCK ....................................................... 81
Enabling a Weather Alert ..................................... 56
CHANNEL DISPLAY ....................................................... 57
SCAN ....................................................................... 59
NORMAL SCAN ........................................................... 60
Band Scan ....................................................... 60
Program Scan ................................................... 61
Storing a Program Scan Frequency Range ........... 61
Performing Program Scan ............................... 62
MEMORY SCAN .......................................................... 63
All-Channel Scan ............................................... 63
CALL SCAN .............................................................. 64
PRIORITY SCAN .......................................................... 65
Programming Priority Channels ............................. 65
Using Priority Scan ............................................ 65
MEMORY CHANNEL LOCKOUT ............................................. 67
SCAN RESUME METHOD .................................................. 68
SELECTIVE CALL ......................................................... 69
CTCSS AND DCS ...................................................... 69
CTCSS ................................................................. 69
Using CTCSS .................................................... 69
Selecting a CTCSS Frequency ............................... 70
CTCSS Freq. ID Scan .......................................... 72
DCS .................................................................... 73
Using DCS ....................................................... 73
Selecting a DCS Code ......................................... 74
DCS Code ID Scan ............................................. 75
DTMF FUNCTIONS ....................................................... 76
MANUAL DIALING (TH-K2AT/ ET/ K4AT ONLY) ........................ 76
DTMF TX Hold (TH-K2AT/ ET/ K4AT only) .................. 77
AUTOMATIC DIALER ...................................................... 77
Storing a DTMF Number in Memory ........................ 77
Transmitting a Stored DTMF Number ....................... 79
Adjusting the DTMF Tone Transmission Speed ........... 80
Adjusting the Pause Duration ................................ 80
DTMF KEY LOCK ....................................................... 81

.
OPERATOR CONVENIENCES ............................................ 82
APO (AUTO POWER OFF) .............................................. 82
BATTERY LIFE ............................................................ 83
REMAINING BATTERY CAPACITY ........................................... 83
BATTERY SAVER ......................................................... 84
BEAT SHIFT .............................................................. 85
BEEP FUNCTION .......................................................... 85
BUSY CHANNEL LOCKOUT ................................................ 86
FREQUENCY STEP SIZE ................................................... 86
LAMP .................................................................... 88
LOCK FUNCTION ......................................................... 88
Tuning Control Unlock ......................................... 89
MICROPHONE PF KEYS (OPTIONAL) ...................................... 89
MONITOR ................................................................ 91
NARROW BAND FM OPERATION .......................................... 91
POWER-ON MESSAGE ................................................... 92
PROGRAMMABLE VFO ................................................... 93
TIME-OUT TIMER ........................................................ 94
TX INHIBIT .............................................................. 95
TX POWER .............................................................. 95
VOX (VOICE-OPERATED TRANSMISSION) ................................. 96
VOX Gain ........................................................ 97
VOX Delay Time ................................................ 99
VOX on Busy .................................................. 100
OPTIONAL ACCESSORIES ............................................. 101
INTERFACING TO PERIPHERALS .................................... 104
SP/MIC JACK ........................................................ 104
SP/MIC ......................................................... 104
PC ............................................................... 105
Using the PG-4Y PC Interface Cable ................. 106
Using the MCP-1A Software ........................... 107
TROUBLESHOOTING ................................................... 108
GENERAL INFORMATION ................................................. 108
Service ......................................................... 108
Service Note .................................................. 109
Cleaning ....................................................... 110
BACKUP BATTERY ...................................................... 110
OPERATOR CONVENIENCES ............................................ 82
APO (AUTO POWER OFF) .............................................. 82
BATTERY LIFE ............................................................ 83
REMAINING BATTERY CAPACITY ........................................... 83
BATTERY SAVER ......................................................... 84
BEAT SHIFT .............................................................. 85
BEEP FUNCTION .......................................................... 85
BUSY CHANNEL LOCKOUT ................................................ 86
FREQUENCY STEP SIZE ................................................... 86
LAMP .................................................................... 88
LOCK FUNCTION ......................................................... 88
Tuning Control Unlock ......................................... 89
MICROPHONE PF KEYS (OPTIONAL) ...................................... 89
MONITOR ................................................................ 91
NARROW BAND FM OPERATION .......................................... 91
POWER-ON MESSAGE ................................................... 92
PROGRAMMABLE VFO ................................................... 93
TIME-OUT TIMER ........................................................ 94
TX INHIBIT .............................................................. 95
TX POWER .............................................................. 95
VOX (VOICE-OPERATED TRANSMISSION) ................................. 96
VOX Gain ........................................................ 97
VOX Delay Time ................................................ 99
VOX on Busy .................................................. 100
OPTIONAL ACCESSORIES ............................................. 101
INTERFACING TO PERIPHERALS .................................... 104
SP/MIC JACK ........................................................ 104
SP/MIC ......................................................... 104
PC ............................................................... 105
Using the PG-4Y PC Interface Cable ................. 106
Using the MCP-1A Software ........................... 107
TROUBLESHOOTING ................................................... 108
GENERAL INFORMATION ................................................. 108
Service ......................................................... 108
Service Note .................................................. 109
Cleaning ....................................................... 110
BACKUP BATTERY ...................................................... 110

.
MICROPROCESSOR RESET .............................................. 111
Initial Settings ................................................ 111
Full Reset ..................................................... 111
VFO Reset ..................................................... 111
Performing Reset ............................................ 112
Full reset ................................................. 112
VFO reset ................................................. 113
Reset using the Menu ....................................... 114
OPERATION NOTICES ................................................... 115
Operating Voltage ............................................ 115
Receiving Signals in Cities ................................ 115
Transmission .................................................. 116
Internal Beats ................................................. 116
TROUBLESHOOTING ..................................................... 117
INTERNAL BEATS FREQUENCY LIST ...................................... 121
SPECIFICATIONS ....................................................... 122
INDEX .................................................................... 134
MICROPROCESSOR RESET .............................................. 111
Initial Settings ................................................ 111
Full Reset ..................................................... 111
VFO Reset ..................................................... 111
Performing Reset ............................................ 112
Full reset ................................................. 112
VFO reset ................................................. 113
Reset using the Menu ....................................... 114
OPERATION NOTICES ................................................... 115
Operating Voltage ............................................ 115
Receiving Signals in Cities ................................ 115
Transmission .................................................. 116
Internal Beats ................................................. 116
TROUBLESHOOTING ..................................................... 117
INTERNAL BEATS FREQUENCY LIST ...................................... 121
SPECIFICATIONS ....................................................... 122
INDEX .................................................................... 134

.
THANK YOU

THANK YOU

Don’t let the size fool you! This small FM portable
transceiver features a 5-watt transmitter and various
selective calls without installing options. As you learn
how to use this transceiver, you will also find that
KENWOOD is pursuing “user friendliness”. For
example, each time you change the Menu No. in Menu
Mode, you will see a text message on the display that
lets you know what you are configuring.

Though user friendly, this transceiver is technically
sophisticated and some features may be new to you.
Consider this manual to be a personal tutorial from the
designers. Allow the manual to guide you through the
learning process now, then act as a reference in the
coming years.

FEATURES

•
Compact design
•
Aluminum die-cast chassis
•
High output power (up to 5 W operation)
•
100 memory channels or 50 channels with names
•
Long operation period with a Ni-MH battery pack
•
Menu allows for easy control and selecting of various
functions.
•
Optional PC software is available to manage the
memory channel contents.
•
Built-in VOX function
vi

.
SUPPLIED ACCESSORIES

SUPPLIED ACCESSORIES

Accessory Part Number
Quantity
TH-K2AT
K K2 M M2
Belt hook
(w/ screws) J29-0709-XX 1 1 1 1
Antenna T90-1018-XX 1 1 1 1
Strap J69-0342-XX – – 1 1
Battery case A02-3817-XX – 1 – 1
Ni-MH battery W09-0991-XX 1 – 1 –
Charger
W08-0959-XX – – 1 –
W08-0960-XX 1 – – –
Instruction
Manual
E B62-1696-XX 1 1 1 1
S B62-1697-XX 1 1 – –
G B62-1699-XX – – – –
C B62-1695-XX – – – 1
I B62-1702-XX – – – –
F B62-1757-XX – – – –
D B62-1758-XX – – – –
Warranty card – 1 1 – –

vii

.
Accessory Accessory
Quantity
TH-K2E TH-K2ET
E E3
Belt hook
(w/ screws) J29-0709-XX 1 1
Antenna T90-1018-XX 1 1
Strap J69-0342-XX 1 1
Battery case A02-3817-XX – –
Ni-MH battery W09-0991-XX 1 1
Charger
W08-0959-XX 1 1
W08-0960-XX – –
Instruction
Manual
E B62-1696-XX 1 1
S B62-1697-XX 1 1
G B62-1699-XX 1 1
C B62-1695-XX – –
I B62-1702-XX 1 1
F B62-1757-XX 1 1
D B62-1758-XX 1 1
Warranty card – 1 1

viii

.
Accessory Accessory
Quantity
TH-K4AT TH-K4E
M2 E3
Belt hook
(w/ screws) J29-0709-XX 1 1
Antenna T90-1019-XX 1 1
Strap J69-0342-XX 1 1
Battery case A02-3817-XX 1 –
Ni-MH battery W09-0991-XX – 1
Charger
W08-0959-XX – 1
W08-0960-XX – –
Instruction
Manual
E B62-1696-XX 1 1
S B62-1697-XX – 1
G B62-1699-XX – 1
C B62-1695-XX 1 –
I B62-1702-XX – 1
F B62-1757-XX – 1
D B62-1758-XX – 1
Warranty card – – 1

.
WRITING CONVENTIONS FOLLOWED

WRITING CONVENTIONS FOLLOWED

Instruction What to Do
Press [KEY]. Press and release KEY.
Press
[KEY1], [KEY2].
Press KEY1 momentarily, release
KEY1, then press KEY2.
Press
[KEY] (1 s).
Press and hold KEY down for a
second.
Press
[KEY1]+[KEY2].
Press and hold KEY1 down, then
press KEY2 If there are more.
than two keys, press and hold
down each key in turn until the
final key has been pressed.
Press
][KEY]+[ .
With the transceiver OFF, press
and hold KEY, then switch ON
the transceiver power by pressing
][ (POWER).

Since the amateur radio bands are slightly different from
country to country, the following meter band descriptions
are used in this manual.

2 m band: 144 ~ 148 MHz or 144 ~ 146 MHz
70 cm band: 430 ~ 440 MHz

.
PREPARATION
PREPARATION

Note: Because the battery pack is provided uncharged, you must
charge the battery pack before using it with the transceiver. To
charge the battery pack, refer to “CHARGING THE PB-43N Ni-MH
BATTERY PACK (Other than TH-K2AT K2/ M2, TH-K4AT M2)” {page 6}.

1
Unlock (open) the safety catch located at the bottom
of the battery pack.

2
Match the guides of the battery pack with the
corresponding grooves on the upper rear of the
transceiver, then firmly press the battery pack to lock
it in place.

3
Flip the safety catch into place to prevent
accidentally pressing the release latch and removing
the battery pack.

.
4
4

INSTALLING ALKALINE BATTERIES

1
To open the BT-14 battery case lid, insert your thumb
or finger into the hole on the top of the battery case,
then pull the cover up.

.
2
2

•
Be sure to match the battery polarities with those
marked in the bottom of the battery case.
3 Align the two tabs at the bottom of battery case, then
close the cover until the locking tabs on top click.
4
To install the battery case onto (or remove it from)
the transceiver, follow steps 1 to 3 of “INSTALLING THE
PB-43N Ni-MH BATTERY PACK” {page 1}.

Note:

.
Do not use Manganese batteries or Ni-Cd batteries in place of
Alkaline batteries.
.
Always replace all batteries at the same time. Mixing old and new
batteries or mixing types (such as Alkaline with zinc carbon) will
reduce overall performance and could cause leakage or rupture.
.
Remove all batteries from the case when it is not expected to be
in use for several months.
.
The voltage of new Alkaline batteries varies slightly, depending
on the manufacturer. Thus, the high battery power indicator may
not appear even though new Alkaline batteries are installed
{page 83}.
.
To lift the battery pack safety catch, use a piece of hardened
plastic or metal, such as a screwdriver, that is no more than
6 mm wide and 1 mm thick. It is imperative that you place the
implement under only the lip of the safety catch so that you do
not damage the release latch.
3

.
INSTALLING THE ANTENNA

INSTALLING THE ANTENNA

ATTACHING THE HAND STRAP (OTHER THAN TH-K2AT K/ K2)

If desired, you can attach the supplied hand strap to the
transceiver.

Strap
4

.
INSTALLING THE BELT CLIP

INSTALLING THE BELT CLIP

1
Loosely insert the two supplied screws into the holes
on the back panel of the transceiver.

2 Slide the belt hook into position, under the screws.
3 Tighten the screws until secure.

Note: When the belt hook is not attached to the transceiver, remove
the screws from the transceiver to avoid scratching other materials.

.
CHARGING THE PB-43N Ni-MH BATTERY PACK
(OTHER THAN TH-K2AT K2/ M2, TH-K4AT M2)

CHARGING THE PB-43N Ni-MH BATTERY PACK
(OTHER THAN TH-K2AT K2/ M2, TH-K4AT M2)

1
Confirm that the transceiver power is OFF.

•
While charging the battery pack, leave the transceiver
power OFF.
2
Insert the charger plug into the DC IN jack of the
transceiver.

DC IN jack
3
Plug the charger into an AC wall outlet.

• Charging starts.
4 It takes approximately 12 hours to charge an empty
PB-43N Ni-MH battery pack. After 12 hours, remove
the charger plug from the transceiver DC IN jack.
5 Unplug the charger from the AC wall outlet.

.
Note:

.
Never leave the battery pack in direct sunlight.
.
The transceiver becomes warm while charging the battery pack.
.
While the battery pack is charged, the ambient temperature must
be within 0° C ~ 40° C (32° F ~ 104° F). Otherwise, charging does
not start. If the transceiver senses that the temperature is more
than 60° C (140° F) during charging, the transceiver stops
charging.
.
Before recharging the battery pack, use the battery pack until the
transceiver stops receiving.
.
Do not plug the charger into the DC IN jack for more than 24
hours.
.
Unplug the charger as soon as possible after the charging period
is over.
.
After the battery pack is charged, do not unplug and plug the
charger into the AC outlet again. Unpluging the charger will reset
the charging timer and the battery pack will be charged again.
This could result in over-charging.
.
If the battery pack is recharged repeatedly before the battery
pack is not fully used, the memory effect (the battery pack will not
allow the charger to recharge the battery to more than a certain
voltage level) may occur. In this case, turn the transceiver ON
until it stops receiving in order to discharge the battery pack, then
recharge the battery pack as normal.
.
If the battery pack is not used for a long time, the battery pack
capacity temporarily decreases. In this case, charge the battery
and use the battery pack until the transceiver stops receiving.
Repeat this procedure a few times. The battery pack should
recover its capacity.
.
If the charger is plugged into the DC IN jack before the battery
pack is attached, turn the transceiver power ON and then OFF
again to initiate charging.
.
Exceeding the specified charge period shortens the useful life of
the PB-43N Ni-MH battery pack.
.
The provided charger is designed to charge only the PB-43N
Ni-MH battery pack. Charging other models of battery packs
may damage the charger and battery pack.
.
Do not transmit while charging.
.
When not in use, store the battery pack in a cool and dry place.
.
Before charging the PB-43N Ni-MH battery pack, ensure that the
safety catch is firmly closed.
7

.
CONNECTING TO A CIGARETTE LIGHTER SOCKET

CONNECTING TO A CIGARETTE LIGHTER SOCKET

When the PG-3J is connected to the cigarette lighter
plug, the transceiver automatically starts charging the
PB-43N Ni-MH battery pack. While you operate the
transceiver, it charges the PB-43N Ni-MH battery pack
in the background.

To connect with an external 24 V power source via a DC-DC
converter, only use the optional PG-3J Cigarette Lighter cable.
Using the PG-2W DC cable in this situation may cause a fire.
PG-2W
24V
12V24V PG-3J
12V
12V24V PG-3J
DC-DC Converter
Socket
DC-DC Converter

Note:

.
Do not use the PG-2W to connect a vehicle battery (12 V)
directly. Extensive voltage could result in damaging the
transceiver.
.
If the input voltage exceeds approximately 16.5 V, warning beeps
sound and “DC ERR” appears.
8

.
CONNECTING TO A REGULATED POWER SUPPLY

CONNECTING TO A REGULATED POWER SUPPLY

1
Confirm that the power of both the transceiver and
the DC power supply is OFF.

2
Connect the optional PG-2W DC cable to the DC
power supply; the red lead to the positive (+)
terminal, and the black lead to the negative (–)
terminal.

Fuses (4 A)
3 Connect the barrel plug on the DC cable to the
DC IN jack of the transceiver.

While a DC power supply is connected with the DC IN
jack, the transceiver automatically initiates charging the
PB-43N Ni-MH battery pack.

Note:

.
If the DC power supply voltage is below 12.0 V DC, you may not
be able to charge the PB-43N Ni-MH battery pack.
.
The supply voltage must be between 12.0 V and 16.0 V to
prevent damaging the transceiver. If the input voltage exceeds
approximately 16.5 V, warning beeps sound and “DC ERR”
appears. Remove the DC IN jack plug immediately.
u If the DC power supply voltage is above 14.5 V DC and “ ”
(High Power) is selected, the “ ” icon blinks and the output

power is gradually reduced to “

” level (Medium Power)
{page 95}.
9

.
YOUR FIRST QSO
YOUR FIRST QSO

Are you ready to give your transceiver a quick try?
Reading this chapter should get your voice on the air
right away. The instructions below are intended only for
a quick guide. If you encounter problems or there is
something you would like to know more, read the
detailed explanations given later in this manual.

1 Press and hold [

] (POWER) briefly to switch the
transceiver power ON (TH-K2AT/ E/ ET example
shown below).
10

.
•
•
•
The transceiver stores the current parameters when it
is turned OFF and automatically recalls these
parameters the next time you turn the transceiver ON.
2
Turn the VOL control clockwise, to the 11 o’clock
position.

3 Turn the Tuning control to select a reception
frequency.

ENC
•
You may further turn the VOL control to adjust the
volume level of the signal.
4 To transmit, hold the transceiver approximately 5 cm
(2 inches) from your mouth.
5 Press and hold [PTT], then speak in your normal
tone of voice.
6 Release [PTT] to receive.
7 Repeat steps 4, 5 and 6 to continue communication.

.
GETTING ACQUAINTED
GETTING ACQUAINTED

Tuning control
LED
(TX:Red RX:Green)
Display (LCD)
SP/MIC jack
DC IN jack
MENU key
MONI/SQL key
LAMP key
Power Switch
PTT switch
Antenna connector
VOL control
Keypad
TH-K2AT/ ET/ K4AT

.
Tuning control
VOL control
LED
(TX:Red RX:Green)
Display (LCD)
DC IN jack
Keypad
MENU key
MONI/SQL key
LAMP key
Power Switch
PTT switch
Antenna connector
SP/MIC jack

Tuning control
VOL control
LED
(TX:Red RX:Green)
Display (LCD)
DC IN jack
Keypad
MENU key
MONI/SQL key
LAMP key
Power Switch
PTT switch
Antenna connector
SP/MIC jack
TH-K2E/ K4E

.
DISPLAY

DISPLAY
w
e
r
tyuio!0!1

!8
!7
!6
!5!4!3!2

Appears when the CTCSS function is activated
{page 69}.

Appears when the Tone function is activated
{page 34}.

Appears when the DCS function is activated {page 73}.

Appears when the repeater shift function is activated
{pages 31 ~ 34, 37}.

Appears when the Reverse function is activated
{page 38}.

Appears when the Automatic Simplex Check (ASC)
function is activated {page 38}.

.
u

Displays the frequencies, Menu settings, Memory name
and other information.

Appears when the Weather Alert function is activated
{page 55}.

Appears when narrow FM Mode is selected {page 91}.

Displays the Menu No., memory channel number, and
status {pages 24, 41}.

Appears when the displayed memory channel has data
{page 44}.

Appears when the Lock function is ON {page 88}.

Appears when the Memory Channel Lockout function is
ON {page 67}.

Appears when the VOX function is ON {page 96}.

S-meter (RX) and remaining battery capacity indicator
(TX). Confirm the remaining battery capacity when the
transceiver transmits {page 83}.

.
!7

Appears when the function key is pressed.

appears when high power transmission is selected,
appears when medium power is selected, and
appears when low power is selected {page 95}.

.
BASIC OPERATION

BASIC OPERATION

1 Press [

] (POWER) briefly to switch the transceiver
power ON.
•
A high pitched double beep sounds and a Power-ON
message {page 92} appears briefly, followed by the
frequency and other indicators.
2 To switch the transceiver OFF, press [ ] (POWER)
again.

•
When you turn the transceiver OFF, a low pitched
double beep sounds.
•
The transceiver stores the current frequency and
parameters when it is turned OFF and recalls these
parameters the next time you turn the transceiver ON.
Adjusting the Volume

Turn the VOL control clockwise to increase the audio
output level and counterclockwise to decrease the
output level.

ENC.
•
If you are not receiving a signal, press and hold
[MONI/SQL] to unmute the speaker, then adjust the
VOL control to a comfortable audio output level.
17

.
Adjusting the Squelch

Adjusting the Squelch

The appropriate squelch level depends on the ambient
RF noise conditions.

1
Press [F], [MONI/SQL].

•
The current squelch level appears.
2
Turn the Tuning control to adjust the level.

•
Select the level at which the background noise is just
eliminated when no signal is present.
•
The higher the level, the stronger the signals must be
to receive.
•
6 different levels can be set.
(0: Minimum ~ 5: Maximum; 2 is the default value)
3 Press any key other than [LAMP], [MONI/SQL] to
store the new setting and exit the squelch
adjustment.

.
Transmitting

1
To transmit, hold the transceiver approximately 5 cm
(2 inches) from your mouth, then press and hold
[PTT] and speak into the microphone in your normal
tone of voice.

•
The LED lights red and the bar-graph meter appears.
•
If you press [PTT] while you are outside of the
transmission coverage, a high pitched error beep
sounds.
2
When you finish speaking, release [PTT].

Note: If you continuously transmit for longer than the time specified
in Menu No. 23 (default is 10 minutes) {page 94}, the internal time-
out timer generates a warning beep and the transceiver stops
transmitting. In this case, release [PTT] and let the transceiver cool
down for a while, then press [PTT] again to resume transmission
{page 116}.

¦
Selecting an Output Power
Selecting a lower transmission power is the best way
to reduce battery consumption, if communication is
still reliable. You can configure different power levels
for transmission {page 95}.

Press [F], [PTT] to cycle between “

” (high), “
”
(medium), and “

” (low).
19

.
Selecting a Frequency

¦
VFO Mode
This is the basic mode for changing the operating
frequency. Turn the Tuning control clockwise to
increase the frequency and counterclockwise to
decrease the frequency.

¦
MHz Mode
If the desired operating frequency is far away from
the current frequency, it is quicker to use the MHz
Tuning Mode.

To adjust the MHz digit:
1 Press [F].

•
The MHz digit blinks.
2
Turn the Tuning control to select the desired MHz
value.

3
After selecting the desired MHz value, press [F]
to exit the mode and return to normal VFO Mode.

4
Continue adjusting the frequency as necessary,
using the Tuning control.

.
¦
n
In addition to turning the Tuning control, there is
another way to select the frequency. When the
desired frequency is far away from the current
frequency, you can directly enter a frequency using
the numeric keypad.

1
Press [VFO].

•
You must be in the VFO Mode to make the direct
frequency entry.
2
Press [#].

3
Press the numeric keys ([0] to [9]) to enter your
desired frequency. [] allows you to complete the
MHz digits entry.

•
Pressing [#] fills all remaining digits (the digits you
did not enter) with 0 and completes the entry. For
example, to select 145.000 MHz, press [1], [4], [5]
and press [#] to complete the entry.
•
If you want to revise the MHz digits only, leaving the
kHz digits as they are, press [VFO] in place of [#].
Example 1

To enter 145.750 MHz:
Key in Display
[#] – –– –––
[1], [4], [5] 1 4 5. – – –
[7], [5], [0] 1 4 5. 7 5 0

.
Example 2

Example 2
:
Key in Display
[#] ––– –––
[1], [4], [5] 1 4 5. – – –
[#] 1 4 5. 0 0 0

Example 3 (Short cut)

To enter 145.000 MHz:
Key in Display

1 4 4. 6 2 5
[#] ––– –––
[5] 5 – –. – – –
[] 1 4 5. – – –
[#] 1 4 5. 0 0 0
Example 4

To change 144.650 MHz to 145.650 MHz:
Key in Display

1 4 4. 6 5 0
[#] ––– –––
[1], [4], [5] 1 4 5. – – –
[VFO] 1 4 5. 6 5 0
22

.
Example 5 (Short cut)

Example 5 (Short cut)

Key in Display
1 4 4. 6 5 0
[#]
[5]
[ ]
[VFO]
––– –––
5 – – – – –
1 4 5. – – –
1 4 5. 6 5 0
Example 6

To change 145.200 MHz to 145.750 MHz:
Key in Display

1 4 5. 2 0 0
[#] ––– –––
[] 1 4 5. – – –
[7], [5], [0] 1 4 5. 7 5 0
Note:

.
If the entered frequency does not match the current
frequency step size, the frequency is automatically rounded
down to the next available frequency.
.
When the desired frequency cannot be entered exactly,
confirm the frequency step size {page 86}.
.
If you turn the Tuning control while entering the frequency,
the transceiver clears the entry and changes to the next
available frequency.
23

.
MENU SETUP
MENU SETUP

Many functions on this transceiver are selected or
configured via a software-controlled Menu rather than
through the physical controls of the transceiver. Once
you become familiar with the Menu system, you will
appreciate its versatility. You can customize the various
timings, settings, and programming functions on this
transceiver to meet your needs without using many
controls and switches.

MENU ACCESS

1
Press [MENU].

•
A brief explanation of the Menu, and the setting and
Menu No. appear on the display.
Parameter Menu No.

Function
2 Turn the Tuning control to select your desired Menu.

•
As you change the Menu No., a brief explanation of
each Menu appears along with its current parameter.
24

.
3 Press [MENU] to configure the parameter of the
currently selected Menu No.

3 Press [MENU] to configure the parameter of the
currently selected Menu No.
4 Turn the Tuning control to select your desired
parameter.

5
Press [MENU] to store the new setting. Otherwise,
press any key other than [LAMP], [MONI/SQL] or
[

] (POWER) to cancel.
Note:

.
The [LAMP] and [MONI/SQL] keys can be operated while
configuring the Menu.
.
We recommend you pressing [PTT] to cancel the parameter
setting and restore its old value. However, you can also press
any key other than [LAMP], [MONI/SQL] or [MENU] to cancel.
25

.
MENU FUNCTION LIST

MENU FUNCTION LIST
Menu
No. Function Selections Default Ref.
Page
STP1 1 Frequency step
size
5/ 6.25/ 10/
12.5/ 15/ 20/ 25/
30/ 50/ 100 kHz
5/ 12.5/
25 86
T.CT.DCS 2 Tone/ CTCSS/
DCS selection
OFF/ TONE/
CTCSS/ DCS OFF 34,
69, 73
T 3 Tone frequency 67.0 ~ 254.1 Hz 88.5 35
CT 4 CTCSS
frequency 67.0 ~ 254.1 Hz 88.5 70
DCS 5 DCS code 023 ~ 754 023 74
SFT 6 Shift direction OFF/ +/ –/ –7.6 OFF 32
P.VFO 7 Programmable
VFO
136 ~ 174 MHz
(TH-K2AT)
144 ~ 146 MHz
(TH-K2E/ ET)
400 ~ 470 MHz
(TH-K4AT)
430 ~ 440 MHz
(TH-K4E)
93
OFFSET1 8 Repeater offset
frequency
0.000 ~ 69.950
MHz
0.600/
1.600/
5.000
33
ARO2 9 Automatic
Repeater Offset ON/ OFF ON 37
PRI 10 Priority scan ON/ OFF OFF 66
SCAN 11 Scan resume
method TO/ CO/ SE TO 68
L.OUT 12 Memory channel
lockout ON/ OFF OFF 67
M.CH 13 Memory channel
capacity 50/ 100 50 41

.
On the
Display
On the
Display Function Selections Default Ref.
Page
M.NAME 14 Memory name 6 characters – 48
MDF 15
Memory name/
Frequency
display
MN/ FRQ MN 49
SAV 16 Battery saver
OFF/ 0.2/ 0.4/
0.6/ 0.8/ 1.0/
2.0/ 3.0/ 4.0/ 5.0
1.0 84
APO 17 Automatic
Power-OFF
OFF/ 30/ 60/ 90/
120/ 180 min. 30 82
CK1 18 CALL key CALL/ 1750 CALL/
1750 36, 64
HLD 19 1750 Hz tone
TX hold ON/ OFF OFF 36
VOX 20 VOX function OFF/ 1 ~ 9 OFF 96
VXB 21 VOX on busy ON/ OFF OFF 100
VD 22 VOX delay
250/ 500/ 750/
1000/ 1500/
2000/ 3000 ms
500 99
TOT 23 Time-out Timer 3/ 5/ 10 minutes 10 94
BCL 24 Busy channel
lockout ON/ OFF OFF 86
TXI 25 TX inhibit ON/ OFF OFF 95
P.ON.MSG 26 Power-ON
message 6 characters – 92
BP 27 Beep ON/ OFF ON 85
BS 28 Beat Shift ON/ OFF OFF 85
FMN 29 Narrow FM ON/ OFF OFF 91
ENC 30 Tuning control
unlock ON/ OFF OFF 89

.
On the
Display
On the
Display Function Selections Default Ref.
Page
PC 31 PC control ON/ OFF OFF 107
DTMF.MR 32 Automatic dialer Up to 16 digits – 77
SPD 33 DTMF TX speed FA/ SL FA 80
DT.H3 34 DTMF TX hold ON/ OFF OFF 77
PA 35 DTMF pause
period
100/ 250/ 500/
750/ 1000/
1500/ 2000 ms
500 80
DT.L 36 DTMF key lock ON/ OFF OFF 81
WXA4 37 Weather Alert ON/ OFF OFF 56
RESET 99 Reset selection VFO/ FULL VFO 111

1 Default settings vary according to the transceiver model you are
using. See the reference page to determine which default setting
is available for your transceiver.
2 Only available for TH-K2AT K/ K2 and TH-K2E/ ET
3 Only available for TH-K2AT/ ET and TH-K4AT
4 Only available for TH-K2AT K/ K2

.
ALPHABETICAL FUNCTION LIST

ALPHABETICAL FUNCTION LIST
Menu
No. Selections Default Ref.
Page
APO 17 OFF/ 30/ 60/ 90/ 120/ 180 min. 30 82
ARO2 9 ON/ OFF ON 37
BCL 24 ON/ OFF OFF 86
BP 27 ON/ OFF ON 85
BS 28 ON/ OFF OFF 85
CK1 18 CALL/ 1750 CALL/
1750
36,
64
CT 4 67.0 ~ 254.1 Hz 88.5 70
DCS 5 023 ~ 754 023 74
DTMF.MR 32 Up to 16 digits – 77
DT.H3 34 ON/ OFF OFF 77
DT.L 36 ON/ OFF OFF 81
ENC 30 ON/ OFF OFF 89
FMN 29 ON/ OFF OFF 91
HLD 19 ON/ OFF OFF 36
L.OUT 12 ON/ OFF OFF 67
M.CH 13 50/ 100 50 41
MDF 15 MN/ FRQ MN 49
M.NAME 14 6 characters – 48
OFFSET1 8 0.000 ~ 69.950 MHz in steps of
50 kHz
0.600/
1.600/
5.000
33
PA 35 100/ 250/ 500/ 750/ 1000/ 1500/
2000 ms 500 80
PC 31 ON/ OFF OFF 107
P.ON.MSG 26 6 characters – 92

.
On the
Display
On the
Display Selections Default Ref.
Page
PRI 10 ON/ OFF OFF 66
P.VFO 7
136 ~ 174 MHz (TH-K2AT)
144 ~ 146 MHz (TH-K2E/ ET)
400 ~ 470 MHz (TH-K4AT)
430 ~ 440 MHz (TH-K4E)
93
RESET 99 VFO/ FULL VFO 111
SAV 16 OFF/ 0.2/ 0.4/ 0.6/ 0.8/ 1.0/ 2.0/
3.0/ 4.0/ 5.0 1.0 84
SCAN 11 TO/ CO/ SE TO 68
SFT1 6 OFF/ +/ –/ –7.6 OFF 32
SPD 33 FA/ SL FA 80
STP1 1 5/ 6.25/ 10/ 12.5/ 15/ 20/ 25/ 30/
50/ 100 kHz
5/ 12.5/
25 86
T 3 67.0 ~ 254.1 Hz 88.5 35
T.CT.DCS 2 OFF/ TONE/ CTCSS/ DCS OFF 34,
69, 73
TOT 23 3/ 5/ 10 minutes 10 94
TXI 25 ON/ OFF OFF 95
VD 22 250/ 500/ 750/ 1000/ 1500/
2000/ 3000 ms 500 99
VOX 20 OFF/ 1 ~ 9 OFF 96
VXB 21 ON/ OFF OFF 100
WXA4 37 ON/ OFF OFF 56

1
Default settings vary according to the transceiver model you are
using. See the reference page to determine which default setting
is available for your transceiver.

2
Only available for TH-K2AT K/ K2 and TH-K2E/ ET

3
Only available for TH-K2AT/ ET and TH-K4AT

4
Only available for TH-K2AT K/ K2

.
OPERATING THROUGH REPEATERS
OPERATING THROUGH REPEATERS

Most repeaters use a receive and transmit frequency
pair with a standard or non-standard offset (odd-split).
In addition, some repeaters must receive a tone from
the transceiver to be accessed. For details, consult your
local repeater reference.

TX: 144.725 MHz
TX tone: 88.5 Hz
RX: 145.325 MHz
TX: 144.725 MHz
TX tone: 88.5 Hz
RX: 145.325 MHz

.
OFFSET PROGRAMMING FLOW
qwertSelect a receive frequency.
Select an offset direction.
Select an offset frequency
(only when programming odd-split
repeater frequencies).
Activate the Tone function
(if necessary).
Select a tone frequency
(if necessary).

OFFSET PROGRAMMING FLOW
qwertSelect a receive frequency.
Select an offset direction.
Select an offset frequency
(only when programming odd-split
repeater frequencies).
Activate the Tone function
(if necessary).
Select a tone frequency
(if necessary).
If you store all the above data in a memory channel, you
will not need to reprogram the parameters every time.
Refer to “MEMORY CHANNELS” {page 41}.

Programming an Offset

You must first select an amateur radio repeater downlink
frequency as described in “Selecting an Offset
Frequency” {page 33}.

n Selecting an Offset Direction
Select whether the transmission frequency will be

higher (+) or lower (–) than the reception frequency.

Press [MENU].
Turn the Tuning control to select Menu No. 6

(SFT).

3
Press [MENU].

4
Turn the Tuning control to select “+” or “–”.

•
To program a –7.6 MHz offset (TH-K4E only),
select “–7.6” instead.
5
Press [MENU] to store the setting or [PTT] to
cancel.

•
“+” or “–” (or “ ”) appears above the frequency,
indicating which offset direction is selected.
If the offset transmission frequency falls outside the
allowable range, transmission is inhibited. In this
case, adjust the reception frequency so that the
transmission frequency is within the band limits.

Note: While using an odd-split memory channel or transmitting,
you cannot change the offset direction.

¦
Selecting an Offset Frequency
To access a repeater which requires an odd-split
frequency pair, change the offset frequency from the
default which is used by most repeaters. The default
offset frequency on the 2 m band is 600 kHz (all
TH-K2 models); the default on the 70 cm band is

5.0 MHz (TH-K4AT) or 1.6 MHz (TH-K4E).
33

.
1
1

2
Turn the Tuning control to select Menu No. 8
(OFFSET).

3
Press [MENU].

4
Turn the Tuning control to select the appropriate
offset frequency.

•
The selectable range is from 0.000 MHz to 69.950
MHz in steps of 50 kHz.
5 Press [MENU] to store the setting or [PTT] to
cancel.
6
Press any key other than [LAMP], [MONI/SQL],
and [MENU] to exit Menu Mode.

TH-K4E only: If you have selected “

” for the offset direction, you
cannot change the default (–7.6 MHz) offset frequency.
Note: After changing the offset frequency, the new offset
frequency will also be used by Automatic Repeater Offset.

¦
Activating the Tone Function
1
Press [MENU].

2
Turn the Tuning control to select Menu No. 2
(T.CT.DCS).

.
3 Press [MENU].
4 Turn the Tuning control to select “TONE”.
5 Press [MENU] to store the setting or [PTT] to

cancel.

6
Press any key other than [LAMP], [MONI/SQL],
and [MENU] to exit Menu Mode.

•
“T” appears when the Tone function is ON.
Note: You cannot use the Tone and CTCSS/ DCS functions at
the same time. Switching the Tone function ON after activating
the CTCSS/ DCS deactivates the CTCSS/ DCS function.

TH-K2E/ ET/ K4E only: When you access repeaters that require
a 1750 Hz tone, you do not need to activate the Tone function.
Simply press [CALL] without pressing [PTT] switch to transmit a
1750 Hz tone (default setting).

¦
Selecting a Tone Frequency

Press [MENU].
Turn the Tuning control to select Menu No. 3 (T).
Press [MENU].
Turn the Tuning control to select the desired tone

frequency.

5
Press [MENU] to store the setting or [PTT] to
cancel.

6
Press any key other than [LAMP], [MONI/SQL],
and [MENU] to exit Menu Mode.

.
Available Tone Frequencies

Available Tone Frequencies
67.0 82.5 100.0 123.0 151.4 186.2 225.7
69.3 85.4 103.5 127.3 156.7 192.8 229.1
71.9 88.5 107.2 131.8 162.2 203.5 233.6
74.4 91.5 110.9 136.5 167.9 206.5 241.8
77.0 94.8 114.8 141.3 173.8 210.7 250.3
79.7 97.4 118.8 146.2 179.9 218.1 254.1

Note: 42 different tones are available for the transceiver. These
42 tones includes 37 EIA standard tones and 5 non-standard
tones.

TH-K2E/ ET/ K4E only:

.
To transmit a 1750 Hz tone, simply press [CALL] without
pressing [PTT] (default setting). Release [CALL] to quit
transmitting. You can also make the transceiver remain in the
transmit mode for 2 seconds after releasing [CALL]; a 1750
Hz tone is not continuously transmitted. Access Menu No. 19
(HLD) and select “ON”.
.
If you want to use [CALL] for recalling the Call channel in
place of transmitting a 1750 Hz tone, access Menu No. 18
(CK) and select “CALL”.
TH-K2E/ 4E only:

.
If you press [CALL] while transmitting, 1750 Hz tone will be
transmitted.
TH-K2AT/ ET/ K4AT only:

.
If you press [CALL] while transmitting, DTMF D code will be
transmitted.
36

.
AUTOMATIC REPEATER OFFSET (TH-K2AT/ E/ ET ONLY)

AUTOMATIC REPEATER OFFSET (TH-K2AT/ E/ ET ONLY)

TH-K2AT K/ K2 only

144.0 145.5 146.4 147.0 147.6
145.1 146.0 146.6 147.4 148.0 MHz
S – S + S – + S –

S: Simplex
This complies with the standard ARRL band plan.

TH-K2E/ K2ET only

144.0 145.6 145.8 146.0 MHz
S – S

S: Simplex
Note: Automatic Repeater Offset does not function when the
Reverse function is ON {page 38}. However, pressing [F], [MENU]
after Automatic Repeater Offset has selected an offset (split) status,
exchanges the receive and transmit frequencies.

Press [MENU].
Turn the Tuning control to select Menu No. 9 (ARO).
Press [MENU].
Turn the Tuning control to switch the function “ON”

(default) or “OFF”.
5 Press [MENU] to store the setting or [PTT] to cancel.

.
REVERSE FUNCTION

REVERSE FUNCTION

To swap the transmission and reception frequencies:
Press [F], [MENU] to switch the Reverse function ON
(or OFF).

• “R” appears when the function is ON.
Note: You can turn the Reverse function ON when you are operating
in Simplex Mode. However, it does not change the Transmission/
Reception frequency.

AUTOMATIC SIMPLEX CHECK (ASC)

While using a repeater, the ASC function periodically
checks the strength of the signal you are receiving from
the other station. If the station’s signal is strong enough
to allow direct contact without a repeater, the “

”
indicator starts blinking.

.
Press [F], [MENU] (1 s) to switch the function ON (or
OFF).

•
“
” appears when the function is ON.
•
While direct contact is possible, “
” blinks.
Note:

.
Pressing [PTT] switch causes the “
” icon to quit blinking.
.
ASC can be activated while operating in Simplex mode.
However, it does not change the Transmission/ Reception
frequencies.
.
ASC does not function during scan.
.
ASC does not function while Weather Alert function is activated
(TH-K2AT K/ K2 only) {page 55}.
.
Activating ASC while using Reverse, turns Reverse function OFF.
.
If you recall a memory channel or the Call Channel that contains
a Reverse ON status, ASC is switched OFF.
.
ASC causes received audio to be momentarily intermitted every
3 seconds.
TONE FREQ. ID SCAN

This function scans through all tone frequencies to
identify the incoming tone frequency on a received
signal. You can use this function to determine which
tone frequency is required by accessing your local
repeater.

Press [MENU].
Turn the Tuning control to select Menu No. 3 (T).

.
3
3

•
When the transceiver receives a signal, scan starts.
The decimal point blinks during scan.
•
While the transceiver is receiving a signal during Tone
Freq. ID Scan, the signal is emitted from the speaker.
•
To reverse the scan direction, turn the Tuning control.
•
To quit the function, press [PTT].
•
When the tone frequency is identified, a beep sounds
and the identified frequency blinks.
4
Press [MENU] to program the identified frequency in
place of the current tone frequency.

•
Press any key other than [MENU], [LAMP], and
[MONI/SQL] if you do not want to program the
identified frequency.
•
Turn the Tuning control while the identified frequency
is blinking to resume scanning.
Note: Some repeaters do not re-transmit the access tone in the
downlink signal. In this case, check the other station’s uplink signal
to detect the repeater access tone.

.
MEMORY CHANNELS
MEMORY CHANNELS

NUMBER OF MEMORY CHANNELS

The transceiver must be configured to either 100
memory channels without using the Memory Name
function or 50 memory channels with the Memory Name
function (default).

To change the memory channel capacity:

Press [MENU].
Turn the Tuning control to select Menu No. 13

(M.CH).
3 Press [MENU].
4 Turn the Tuning control to select either “50” (default)

or “100”.

5
Press [MENU].

•
“SURE ?” appears.
6
Press [MENU] to accept or press any key other than
[MENU], [LAMP], and [MONI/SQL] to cancel.

.
Note:

.
If you change the memory channel capacity from 100 channels to
50 channels after having stored data in channels 50 to 99, all
memory channel data in channels 50 to 99 will be erased.
.
If you change the memory channel capacity from 50 channels to
100 channels after storing Memory names in those channels, all
Memory name data will be erased.
SIMPLEX & REPEATER OR ODD-SPLIT MEMORY CHANNEL?

You can use each memory channel as a simplex &
repeater channel or an odd-split channel. Store only
one frequency to use as a simplex & repeater channel
or two separate frequencies to use as an odd-split
channel. Select either application for each channel
depending on the operations you have in mind.

Simplex & repeater channels allow:

•
Simplex frequency operation
•
Repeater operation with a standard offset (if an offset
direction is stored)
Odd-split channels allow:

•
Repeater operation with a non-standard offset
Note: Not only you can store data in memory channels, but you can
also overwrite existing data with new data.

.
The data listed below can be stored in each memory
channel:

The data listed below can be stored in each memory
channel:
Simplex &
Repeater Odd-Split
Reception frequency
Yes
Yes
Transmission frequency Yes
Tone frequency Yes Yes
Tone ON Yes Yes
CTCSS frequency Yes Yes
CTCSS ON Yes Yes
DCS code Yes Yes
DCS ON Yes Yes
Offset direction Yes N/A
Offset frequency Yes N/A
Reverse ON Yes N/A
Frequency step size Yes Yes
Narrow band FM Yes Yes
Beat Shift Yes Yes
Memory Channel Lockout Yes Yes
Memory Channel Name Yes Yes

Yes: Can be stored in memory.
N/A: Cannot be stored in memory.

.
Storing Simplex Frequencies or Standard Repeater Frequencies

Storing Simplex Frequencies or Standard Repeater Frequencies

2
Turn the Tuning control to select your desired
frequency.

• You can also directly enter a desired frequency using
the keypad (TH-K2AT/ ET/ K4AT only) {page 21}.
3
If storing a standard repeater frequency, select the
following data:

•
Offset direction {page 32}
•
Tone function, if necessary {page 34}
• CTCSS/ DCS function, if necessary {pages 69, 73}
If storing a simplex frequency, you may select other
related data (CTCSS or DCS settings, etc.).
4 Press [F], [MR].

•
A memory channel number appears and blinks.
•
“
” appears if the channel contains data.
•
Memory channel number L0/U0 ~ L2/U2 {page 61},
Pr (Priority Channel) {page 65} and AL (Weather Alert)
{page 55} (TH-K2AT K/ K2 only) are reserved for other
functions.
5
Turn the Tuning control to select the memory
channel in which you want to store the data.

6
Press [MR] to store the data to the channel.

.
Storing Odd-Split Repeater Frequencies

Storing Odd-Split Repeater Frequencies

1
Store the desired reception frequency and related
data by following the procedure given for simplex or
standard repeater frequencies {page 44}.

2 Turn the Tuning control to select the desired
transmission frequency.
3 Press [F], [MR].
4 Turn the Tuning control to select the memory
channel you programmed in step 1.
5 Press [PTT]+[MR].

• The transmission frequency is stored in the memory
channel.
Note: When you recall an odd-split memory channel, “+” and “–”
appear on the display. To confirm the transmission frequency, press
[F], [MENU] (Reverse function) {page 38}.

.
Recalling a Memory Channel

¦
Using the Tuning Control
1 Press [MR] to enter Memory Recall Mode.

• The memory channel last used is recalled.
2
Turn the Tuning control to select your desired
memory channel.

•
You cannot recall an empty memory channel.
•
To restore VFO Mode, press [VFO].
¦
Using a Numeric Keypad (TH-K2AT/ ET/ K4AT only)
You can also recall a memory channel by entering a
desired memory channel number with the keypad.

Press [MR] to enter Memory Recall Mode.
Press [#], then enter the channel number using
digits.

•
For example, to recall channel 49, press [#], [4],
[9].
•
You can also enter a memory channel number that
is less than 10 by pressing [#] after entering the
channel number. For example, to recall memory
channel 9, press [#], [9], [#]. You can also press
[#], [0], [9].
46

.
Note:

.
You cannot recall an empty memory channel. An error beep
sounds.
.
You cannot recall the Program Scan memory channels
(L0/U0 ~ L2/U2), Priority Channel (Pr) and Weather Alert
(AL) (TH-K2AT K/ K2 only) using the numeric keypad.
.
When you recall an odd-split memory channel, “+” and “–”
appear on the display. Press [F], [MENU] (Reverse function)
{page 38} to display the transmission frequency.
.
After recalling a memory channel, you may modify data such
as Tone or CTCSS. However, these settings are cleared
once you select another channel or the VFO Mode. To
permanently store the data, overwrite the channel contents
{page 44}.
CLEARING A MEMORY CHANNEL

To clear the data from an individual memory channel:

1 Recall the memory channel you want to clear the
data.
2 Press and hold [

] (POWER) to switch the
transceiver OFF.
3 Press [MR]+[

] (POWER).
•
A confirmation message appears.
4 Press [MR] to clear the channel data.

•
The contents of the memory channel are cleared.
•
To quit clearing the memory channel, press any key
other than [MR], [LAMP], [MONI/SQL] and [
]
(POWER).

.
Note:

.
Call Channel data cannot be cleared.
.
You can also clear the Priority Channel, L0/U0 ~ L2/U2 and
Weather Alert data.
.
While the trasceiver is in Channel Display Mode or Lock function
is activated, you cannot clear the channel data.
.
To clear all memory channels contents at once, perform Full
Reset {page 111}.
NAMING A MEMORY CHANNEL

You can name memory channels using up to 6
alphanumeric characters. When you recall a named
memory channel, its name appears on the display in
place of the stored frequency. Names can be call signs,
repeater names, cities, names of people, etc. In order
to use the Memory Name function, the memory channel
capacity must be set to 50 channels. To change the
memory channel capacity from 100 to 50, access Menu
No. 13 (M.CH) {page 41}.

Press [MR] to recall your desired memory channel.
Press [MENU] to enter Menu Mode.
Turn the Tuning control to select Menu No. 14

(M.NAME).
4 Press [MENU].

•
A blinking cursor appears.
5 Turn the Tuning control to select a desired
alphanumeric character.

.
•
•
•
Press [MONI/SQL] to delete the character at the
current cursor position.
6
Press [MENU].

•
The cursor moves to the next digit.
7
Repeat steps 5 and 6 to enter up to 6 digits.

•
To complete the entry, press [MENU] without selecting
a character.
•
Press [MONI/SQL] to delete a character.
•
Press any key other than [MONI/SQL], [MENU], and
[LAMP] to cancel the entry.
After storing a Memory name, the Memory name
appears in place of the operating frequency. However,
you can still display the operating frequency, if desired.
To display the frequency rather than Memory name,
access Menu No. 15 (MDF) and select “FRQ”. This
menu toggles the display mode between the Memory
name (“MN”) and frequency display (“FRQ”).

Note:

.
You cannot name the Call Channel {page 53}.
.
You cannot assign a Memory name to a channel that does not
contain data.
.
You can overwrite stored names by repeating steps 1 to 7.
.
The stored name is erased when you clear the Memory channel
data.
49

.
MEMORY CHANNEL TRANSFER

MEMORY CHANNEL TRANSFER

After retrieving frequencies and associated data from
Memory Recall Mode, you can copy the data to the
VFO. This function is useful, for example, when the
frequency you want to monitor is near the frequency
stored in a memory channel.

1 Press [MR], then turn the Tuning control to recall a
desired memory channel.
2 Press [F], [VFO] to copy the memory channel data
to the VFO.

Note:

.
To copy an odd-split channel data {page 45}, turn the Reverse
function ON {page 38} before performing the transfer.
.
You can also transfer the Program Scan memory channels (L0/U0
~ L2/U2), the Priority Channel (Pr) and Weather Alert (AL)
frequency (TH-K2AT K/ K2 only) to the VFO.
Channel \ Channel Transfer

You can copy channel information from one memory
channel to another. This function is useful when storing
frequencies and associated data that you temporarily
change in Memory Recall Mode.

1 Press [MR], then turn the Tuning control to recall a
desired memory channel.
2 Press [F], [MR].

.
3 Select the memory channel where you would like the
data copied, using the Tuning control.

3 Select the memory channel where you would like the
data copied, using the Tuning control.
4 Press [MR].

The tables below illustrate how data is transferred
between memory channels.

Channel 0 ~ 99 a
Channel 0 ~ 99
Reception frequency a
Reception frequency
Transmission frequency a
Transmission frequency
Tone frequency a
Tone frequency
Offset direction a
Offset direction
CTCSS frequency a
CTCSS frequency
DCS code a
DCS code
Tone/ CTCSS/ DCS
ON/ OFF status a
Tone/ CTCSS/ DCS
ON/ OFF status
Offset frequency a
Offset frequency
Reverse ON a
Reverse ON
Frequency step size a
Frequency step size
Memory channel name1 a
Memory channel name1
Memory Channel
Lockout ON/ OFF a
Memory Channel
Lockout ON/ OFF

.
Channel 0 ~ 99 a
L0/U0 ~ L2/U2, Pr, AL1
Reception frequency a
Reception frequency
Transmission frequency a
Transmission frequency
Tone frequency a
Tone frequency
Offset direction a
Offset direction
CTCSS frequency a
CTCSS frequency
DCS code a
DCS code
Tone/ CTCSS/ DCS
ON/ OFF status a
Tone/ CTCSS/ DCS
ON/ OFF status
Offset frequency a
Offset frequency
Reverse ON a
Reverse ON
Frequency step size a
Frequency step size
Memory channel name2 a
Memory channel name2
Memory Channel
Lockout ON a
Memory Channel
Lockout OFF

TH-K2AT K/ K2 only
When “50” is selected in Menu No.13 (M.CH).

Note: When transferring an odd-split channel, the Reverse status,
Offset direction and Offset frequency are not transferred {pages 32,
33, 38}.

.
CALL CHANNEL

CALL CHANNEL

The default Call Channel frequencies are 144.000 MHz
for the 2 m band (all TH-K2 models), and 430.000 MHz
(all TH-K4 models) for the 70 cm band.

Note: Unlike memory channels 0 to 99, the Call Channel cannot be
cleared.

Recalling the Call Channel

1 Press [CALL] to recall the Call Channel.

The Call Channel frequency and “C” appear.
To return to the previous frequency, press [CALL]

again.
53

.
Reprogramming the Call Channel

1
Select your desired frequency and related data
(Tone, CTCSS, DCS, or offset direction, etc.).

•
When you program the Call Channel as an odd-split
channel, select a reception frequency first.
2
Press [F], [CALL].

•
The selected frequency and related data are stored in
the Call Channel.
To also store a separate transmit frequency, continue
with the following steps.

3 Select the desired transmission frequency.
4 Press [F].
5 Press [PTT]+[CALL].

•
The separate transmission frequency is stored in the
Call Channel.
Note:

.
When you recall an odd-split Call Channel, “+” and “–” appear on
the display.
.
Transmit offset status and Reverse status are not stored in an
odd-split Call Channel.
54

.
WEATHER ALERT (TH-K2AT K/ K2 ONLY)

WEATHER ALERT (TH-K2AT K/ K2 ONLY)

Programming the Weather Radio Frequency

The transceiver is preprogrammed to 162.550 MHz
(WX1). You can store a different frequency to the AL
channel to use this function. Refer to the NOAA
channel frequency directory for your local Weather
Radio frequency before you use the Weather Alert
function. The latest Weather Radio information can be
obtained from http://www.nws.noaa.gov/nwr/.

Press [VFO].
Select your local NOAA Weather Radio frequency

using the Tuning control or keypad.
3 Press [F], [MR].
4 Turn the Tuning control to select memory channel

“AL” (Alert).
5 Press [MR].

•
A long beep sounds and the new NOAA Weather
Radio frequency is stored to memory channel “AL”.
Weather Radio Frequencies (MHz)
WX1 WX2 WX3 WX4 WX5 WX6 WX7 WX8
162.550 162.400 162.475 162.425 162.450 162.500 162.525 163.275

.
Note:

.
When you perform Full Reset {page 111}, the Weather Radio
frequency recovers the factory default frequency (162.550 MHz).
.
When you clear the Weather Radio channel {page 47}, the
factory default frequency (162.550 MHz) will not be recovered.
.
You can also transfer the AL memory channel data to the VFO or
another memory channel.
Enabling a Weather Alert

You can monitor the Weather Radio frequency
continuously or in the background while receiving on
another frequency.

To monitor the Weather Radio frequency continuously:

Press [MENU].
Turn the Tuning control to select Menu No. 37

(WXA).
3 Press [MENU] and turn the Tuning control to select
“ON”.
4 Press [MENU] to store the setting.

•
The frequency automatically changes to the Weather
Radio frequency.
•
“WX” appears on the LCD and the transceiver mutes.
•
The Tone, CTCSS and DCS functions cannot be
configured to the AL channel.
•
When the Weather Alert tone is broadcasted, a morse
code “WX” sounds from speaker and the transceiver
unmutes.
5
To exit the Weather Alert mode, press [MENU],
select Menu No. 37 (WXA), and set it to “OFF”.

.
If you want to monitor another frequency while
monitoring the Weather Radio in the background:

If you want to monitor another frequency while
monitoring the Weather Radio in the background:

• “WX” remains on the LCD.
3 When the Weather Alert tone is broadcasted, the
transceiver automatically switches to the Weather
Radio frequency.
4
To exit the Weather Alert Mode, press [MENU],
select Menu No. 37 (WXA), and set it to “OFF”.

Note:

.
The transceiver checks the weather alert tone every 1 second
while you are monitoring another frequency or channel.
.
If the transceiver is transmitting or receiving a signal on another
frequency, Weather Alert function temporarily pauses.
CHANNEL DISPLAY

While in this mode, the transceiver displays only
memory channel numbers (or Memory names if they
have been stored), instead of frequencies.

1 Press [PTT]+[MR]+[

] (POWER).
•
The transceiver displays the memory channel number
in place of the operating frequencies.
2 Turn the Tuning control to select your desired
memory channel number.

.
While in Channel Display Mode, only the following keys
can be operated.

While in Channel Display Mode, only the following keys
can be operated.

PTT LAMP MONI/SQL F #1
MR CALL Tuning control

1 TH-K2AT/ ET/ K4AT only

[F] then
PTT LAMP1 MONI/SQL MENU F

1 The light stays ON until [F], [LAMP] is pressed again {page 88}.
[KEY] (1 s)

F MR CALL

While transmitting:

LAMP MENU CALL1 Tuning control2

1 1750 Hz tone is transmitted (TH-K2E/ K4E) {page 36}. DTMF D tone
is transmitted (TH-K2AT/ ET/ K4AT) {page 76}.
2 DTMF keypad, [0] ~ [9], [

], [#], and [F] (A tone) ~ [CALL] (D tone)
also works (TH-K2AT/ ET/ K4AT only) {page 76}.
To recover normal operation, turn the transceiver OFF
and press [PTT]+[MR]+[

] (POWER) again.
Note:

.
To enter the Channel Display Mode, you must have at least one
memory channel that contains the data.
.
If the memory channel contains the Memory name data, the
Memory name is displayed in place of the “CH” characters.
58

.
SCAN
SCAN

This transceiver provides the following types of scans.

Scan Type Purpose
Normal
Scan
Band Scan Scans the entire band of the
frequency you selected.
Program
Scan
Scans the specified frequency
ranges stored in Memory
channels L0/U0 ~ L2/U2.
Memory
Scan
All-Channel
Scan
Scans all Memory channels
from 0 to 99 (or from 0 to 49).
Call
Scan
VFO Scans the Call channel and
the current VFO frequency.
Memory
Channel
Scans the Call channel and
the selected Memory channel.
Priority Scan
Checks the activities on the
Priority channel (Pr) every
3 seconds.

.
Note:

.
When the CTCSS or DCS function is activated, the transceiver
stops at a busy frequency and decodes the CTCSS tone or DCS
code. If the tone or code matches, the transceiver unmutes.
Otherwise, it resumes scanning.
.
Press and hold [MONI/SQL] to pause scan in order to monitor
the scanning frequency. Release [MONI/SQL] to resume
scanning.
.
While the transceiver is in VOX Mode or transmitting, it causes
scan to stop (excluding Priority Scan).
.
Pressing [MENU] causes scan to stop.
.
Starting scan switches OFF the Automatic Simplex Check (ASC)
{page 38}.
.
If you press any key other than the following keys during scan,
the transceiver exits scan (excluding Priority Scan). Priority Scan
stops while “Pr” is blinking: [F], [F] (1 s), [LAMP], [MONI/SQL],
Tuning control, and [F] then [MONI/SQL].
NORMAL SCAN

When you are operating the transceiver in VFO Mode,
2 types of scanning are available: Band Scan and
Program Scan.

Band Scan

The transceiver scans the entire band of the frequency
you selected. For example, if you are operating and
receiving at 144.525 MHz, it scans all the frequencies
available for the 2 m band. (Refer to receiver VFO
frequency range in the specifications {page 122}.) When
the current VFO receive frequency is outside the Program
Scan frequency range {page 59}, the transceiver scans
the entire frequency range available for the current VFO.

Press [VFO].
Turn the Tuning control to select the frequency

outside of the Program Scan frequency range.

.
3 Press [VFO] (1 s) to start Band Scan.
4 To stop Band Scan, press [VFO] or [PTT].

3 Press [VFO] (1 s) to start Band Scan.
4 To stop Band Scan, press [VFO] or [PTT].

.
While scanning, you can change the scan frequency direction by
turning the Tuning control.
.
The transceiver scans the frequency range that is stored in Menu
No. 7 (P.VFO) {page 93}.
.
If you select a frequency within the L0/U0 ~ L2/U2 range in step 3,
Program Scan {page 61} starts.
.
If you press [MONI/SQL], Band Scan temporarily pauses.
Release [MONI/SQL] to resume scanning.
Program Scan

You can limit the scanning frequency range. There are
3 memory channel pairs (L0/U0 ~ L2/U2) available for
specifying the start and end frequencies. Program Scan
monitors the range between the start and end
frequencies that you have stored in these memory
channels. Before performing Program Scan, store the
Program Scan frequency range to one of the memory
channel pairs (L0/U0 ~ L2/U2).

¦
Storing a Program Scan Frequency Range

Press [VFO].
Turn the Tuning control to select your desired

start frequency.
3 Press [F], [MR] then turn the Tuning control to
select a memory channel from L0 ~ L2.

.
4
4

5
Turn the Tuning control to select your desired
end frequency.

6
Press [F], [MR] then turn the Tuning control to
select a channel from U0 ~ U2, corresponding to
the channel selected in step 4.

•
For example, if you selected L0 in step 4, select U0
for the end frequency.
7
Press [MR] to store the end frequency in the
memory channel.

¦
Performing Program Scan

Press [VFO].
Turn the Tuning control to select a frequency

within the frequency range of memory channel

L0/U0 ~ L2/U2.
3 Press [VFO] (1 s) to start Program Scan.
4 To stop Program Scan, press [VFO] or [PTT].

Note:

.
If you press [MONI/SQL], Program Scan temporarily pauses.
Release [MONI/SQL] to resume scanning.
.
The transceiver stops scanning when it detects a signal.
.
If more than 2 Program Scan channel pairs are stored and
overlaps the frequency range among the pairs, the smaller
Program Scan memory channel number has priority.
62

.
.
u
MEMORY SCAN

Memory Scan monitors memory channels in which you
have stored frequencies.

All-Channel Scan

The transceiver scans all of the memory channels in
which you have stored frequencies.

1
Press [MR] (1 s).

•
Scan starts from the last memory channel number and
ascends up through the channel numbers (default).
Turn the Tuning control to change the scanning
direction.
2
To stop All-Channel Scan, press [MR] or [PTT].

Note:

.
You must have 2 or more memory channels that contain data,
excluding special function memory channels (L0/U0 ~ L2/U2, Pr,
and AL).
.
You can perform All-Channel Scan in Channel Display Mode
{page 57}.
63

.
CALL SCAN

CALL SCAN

1
Select the frequency (in VFO or Memory Recall
Mode) you want to monitor.

•
In VFO Mode, turn the Tuning control to select the
desired frequency.
•
In Memory Recall Mode, turn the Tuning control to
select the memory channel you want to monitor.
2 Press [CALL] (1 s) to start the Call Scan.
3 The Call Channel and the selected VFO frequency or
memory channel are monitored.
4 To stop Call Scan, press [PTT] or [CALL].

Note:

.
You must configure the CALL key function to “CALL” (Menu No.
18) prior to using Call Scan. Otherwise, a 1750 Hz tone will be
transmitted.
.
The transceiver stops scanning when it detects a signal.
.
You can perform Call Scan even if the recalled memory channel
has been locked out {page 67}.
64

.
PRIORITY SCAN

PRIORITY SCAN

Note: If you do not operate any control or key for 3 seconds after the
signal drops, the transceiver returns to the original frequency and
resumes Priority Scan.

Programming Priority Channels

Press [VFO].
Turn the Tuning control to select your desired

Priority Channel frequency.
3 Select selective call functions, if necessary.
4 Press [F], [MR].

• The memory channel number appears and blinks.
5 Turn the Tuning control to select “Pr”.
6 Press [MR] to store the data on the Priority Channel.

.
Using Priority Scan

1
Press [MENU] and turn the Tuning control to select
Menu No. 10 (PRI).

2
Press [MENU] and turn the Tuning control to select
“ON”.

3
Press [MENU] to store the setting.

•
“PRI” appears.
4
Press any key other than [PTT], [LAMP], and
[MONI/SQL] to exit Menu Mode.

•
The transceiver checks for a signal on the Priority
Channel every 3 seconds.
•
When the transceiver detects a signal on the Priority
Channel, “Pr” blinks and the frequency changes to the
Priority Channel.
•
If you do not operate any control or key for 3 seconds
after the signal drops, the transceiver returns to the
original frequency and resumes Priority Scan.
5
To quit Priority Scan, select “OFF” in step 2.

•
You can also press any key other than [PTT], [F],
[LAMP], [MONI/SQL], [F] then [MONI/SQL] and
[F] (1 s) to exit Priority Scan while “Pr” is blinking.
Note:

.
If a signal is received on a Priority Channel with a CTCSS or
DCS code programmed, the Priority Channel is recalled only
when the programmed tone/ code matches.
.
Press and hold [MONI/SQL] to pause Priority Scan when the
transceiver is not displaying the Priority Channel. Release
[MONI/SQL] to resume Priority Scan.
.
If you clear the Priority Channels {page 47}, Priority Scan stops.
.
If you press any key other than the following keys while “Pr” is
blinking, the transceiver exits Priority Scan: [LAMP],
[MONI/SQL], [F] (1 s), [F] then [MONI/SQL] (Squelch
adjustment) and [PTT].
66

.
MEMORY CHANNEL LOCKOUT

MEMORY CHANNEL LOCKOUT

Press [MR] to enter Memory Recall Mode.
Turn the Tuning control to select the memory

channel to be locked out.

3
Press [MENU].

4
Turn the Tuning control and select Menu No. 12

(L.OUT).

5
Press [MENU] and turn the Tuning control to select
“ON”.

Memory channel number

6 Press [MENU] to store the setting.
7 Press any key other than [LAMP] and [MONI/SQL]
to exit the Menu Mode.

•
A “
” icon appears below the memory channel
number, indicating the channel is locked out.
8
To unlock the memory channel, repeat steps 1 ~ 7,
selecting “OFF” in step 5.

•
The “
” icon disappears.
Note:

.
The Program Scan memories (L0/U0 ~ L2/U2), Priority Channel
(Pr) and Weather Radio frequency (AL) cannot be locked out.
.
Even if a memory channel is locked out, you can perform Call Scan
{page 64} between the Call Channel and the memory channel.
67

.
SCAN RESUME METHOD

SCAN RESUME METHOD

• Time-Operated Mode (default)
The transceiver remains on a busy frequency (or
memory channel) for approximately 5 seconds, then
continues to scan even if the signal is still present.

• Carrier-Operated Mode
The transceiver remains on a busy frequency (or
memory channel) until the signal drops out. There is
a 2-second delay between signal dropout and scan
resumption.

• Seek Mode
The transceiver moves to a frequency or memory
channel where a signal is present and stops.

To change the scan resume method:

Press [MENU].
Turn the Tuning control to select Menu No. 11 (SCAN).
Press [MENU].
Turn the Tuning control to select “TO” (Time-Operated),

“CO” (Carrier-Operated), or “SE” (Seek) Mode.

5 Press [MENU] to store the new setting. Otherwise,
press [PTT] to cancel.
68

.
SELECTIVE CALL
SELECTIVE CALL

You may sometimes want to hear calls from only
specific persons or groups. In this case, use the
Selective Call. This transceiver is equipped with
CTCSS (Continuous Tone Coded Squelch System) and
DCS (Digital Coded Squelch). These Selective Calls
allow you to ignore (not hear) unwanted calls from other
persons who are using the same frequency. The
transceiver unmutes only when it receives a signal
having the same CTCSS tone or DCS code.

Note: CTCSS and DCS do not cause your conversation to be
private or scrambled. It only relieves you from listening to unwanted
conversations.

CTCSS

A CTCSS tone is a sub-audible tone and is selectable
from among the 42 tone frequencies listed in the table
on the page 71. The list includes 37 EIA standard tones
and 5 non-standard tones.

Using CTCSS

1 Press [MENU] and turn the Tuning control to select
Menu No. 2 (T.CT.DCS).
2 Press [MENU] and turn the Tuning control to select
“CTCSS”.

.
•
•
3
Press [MENU].

•
“CT” appears on the upper part of display, indicating
that the CTCSS function is activated.
4
Press any key other than [MENU], [MONI/SQL], and
[LAMP] to exit Menu Mode.

When CTCSS is ON, you will hear calls only when the
selected CTCSS tone is received. To answer the call,
press and hold [PTT], then speak into the microphone.

Note:

.
You cannot use the CTCSS and Tone/ DCS functions
simultaneously. Switching the CTCSS function ON after having
activated the Tone/ DCS functions deactivates the Tone/ DCS
functions.
.
If you select a high CTCSS frequency, receiving audio or noise
that contains the same frequency portions may cause CTCSS to
function incorrectly. To prevent noise from causing this problem,
select an appropriate squelch level {page 18}.
.
While transmitting the 1750 Hz tone by pressing [CALL]
{page 35}, the transceiver does not transmit the CTCSS tone.
Selecting a CTCSS Frequency

1
Press [MENU] and turn the Tuning control to select
Menu No. 4 (CT).

•
The current CTCSS frequency appears.
2
Press [MENU] and turn the Tuning control to select
your desired CTCSS frequency.

•
The selectable CTCSS frequencies are the same as
those for the Tone frequency. Refer to the table on the
following page for the available CTCSS frequencies.
70

Note: To use the selected CTCSS tone, you must turn the CTCSS
function ON {page 69}.

Available CTCSS Tone Frequencies

Tone Frequency (Hz)
67.0 82.5 100.0 123.0 151.4 186.2 225.7
69.3 85.4 103.5 127.3 156.7 192.8 229.1
71.9 88.5 107.2 131.8 162.2 203.5 233.6
74.4 91.5 110.9 136.5 167.9 206.5 241.8
77.0 94.8 114.8 141.3 173.8 210.7 250.3
79.7 97.4 118.8 146.2 179.9 218.1 254.1

.
CTCSS Freq. ID Scan

CTCSS Freq. ID Scan

1 Press [MENU] and turn the Tuning control to select
Menu No. 4 (CT).
2 Press [MENU] (1 s) to start the CTCSS Freq. ID
Scan.

•
While scanning, the decimal point of CTCSS frequency
blinks.
•
To reverse the scan direction, turn the Tuning control.
•
To quit the function, press [PTT].
•
When a CTCSS frequency is identified, the identified
frequency appears and blinks.
3
Press [MENU] to program the identified frequency in
place of the current CTCSS frequency. Otherwise,
press [PTT] to exit the CTCSS FREQ. ID Scan.

•
Turn the Tuning control while the identified frequency
is blinking to resume scanning.
Note:

.
Received signals are monitored through the speaker while
scanning is in progress.
.
CTCSS Freq. ID Scan does not scan the tone if a signal is not
detected.
72

.
DCS

DCS

Using DCS

1 Press [MENU] and turn the Tuning control to select
Menu No. 2 (T.CT.DCS).
2 Press [MENU] and turn the Tuning control to select
“DCS”.

•
As you turn the Tuning control, the selection cycles as
follows: “OFF” Þ “TONE” Þ “CTCSS” Þ “DCS” Þ “OFF”.
3
Press [MENU].

•
“DCS” appears on the display, indicating that the DCS
function is activated.
4
Press any key other than [MENU], [MONI/SQL], and
[LAMP] to exit the Menu Mode.

When DCS is ON, you will hear calls only when the
selected DCS code is received. To answer the call, press
and hold [PTT], then speak into the microphone.

Note: You cannot use the DCS function and CTCSS/ Tone functions
simultaneously. Switching the DCS function ON after having
activated the CTCSS/ Tone functions deactivate the CTCSS/ Tone
functions.

.
Selecting a DCS Code

1
While in DCS Mode, press [MENU] and turn the
Tuning control to select Menu No. 5 (DCS).

• The current DCS code appears.
2 Press [MENU] and turn the Tuning control to select
your desired DCS code.

•
The available DCS codes are shown in the following
table.

023 065 132 205 255 331 413 465 612 731
025 071 134 212 261 332 423 466 624 732
026 072 143 223 263 343 431 503 627 734
031 073 145 225 265 346 432 506 631 743
032 074 152 226 266 351 445 516 632 754
036 114 155 243 271 356 446 523 654
043 115 156 244 274 364 452 526 662
047 116 162 245 306 365 454 532 664
051 122 165 246 311 371 455 546 703
053 125 172 251 315 411 462 565 712
054 131 174 252 325 412 464 606 723

3 Press [MENU] to store the new code or [PTT] to
cancel.

.
DCS Code ID Scan

DCS Code ID Scan

1 Press [MENU] and turn the Tuning control to select
Menu No. 5 (DCS).
2 Press [MENU] (1 s) to start the DCS Code ID Scan
function.

•
While scanning, the decimal point between “DCS” and
the DCS code blinks.
•
To reverse the scan direction, turn the Tuning control.
•
To quit the function, press [PTT].
•
When a DCS code is identified, the identified DCS
code appears and blinks.
3
Press [MENU] to program the identified DCS code in
place of the current DCS code. Otherwise, press
[PTT] to exit the DCS Code ID Scan.

•
Turn the Tuning control while the identified DCS code
is blinking to resume scanning.
Note:

.
Received signals are monitored through the speaker while
scanning is in progress.
.
DCS Code ID Scan does not scan the code if a signal is not
detected.
75

.
DTMF FUNCTIONS
DTMF FUNCTIONS

Many repeaters in the U.S.A. and Canada offer a
service called Autopatch. You can access the public
telephone network via such a repeater by sending
DTMF tones. For further information, consult your local
repeater reference.

MANUAL DIALING (TH-K2AT/ ET/ K4AT ONLY)

The numeric keypad functions as a DTMF keypad; the
12 keys found on a touch-tone phone plus 4 additional
keys (A, B, C, D) on the rightmost column.

To perform Manual Dialing, follow the steps below.

Press and hold [PTT] to transmit.
While transmitting, press the keys in sequence on

the keypad, to send the DTMF tones.

•
The corresponding DTMF tones are transmitted and
monitored through the speaker.
Freq.
(Hz) 1209 1336 1477 1633
697 1 2 3 A
770 4 5 6 B
852 7 8 9 C
941
0 # D

.
•
•
DTMF TX Hold (TH-K2AT/ ET/ K4AT only)

This function causes the transceiver to remain in
Transmission Mode for 2 seconds after you release
each key. So, you can release [PTT] while sending the
DTMF tones.

Press [MENU] to enter Menu Mode.
Turn the Tuning control to select Menu No. 34

(DT.H).
3 Press [MENU] and turn the Tuning control to select
“ON”.
4 Press [MENU] to store the setting or [PTT] to cancel.

AUTOMATIC DIALER

If you use the 10 dedicated memory channels to store
DTMF numbers, you do not need to remember a long
string of digits.

Storing a DTMF Number in Memory

Press [MENU] to enter Menu Mode.
Turn the Tuning control to select Menu No. 32

(DTMF.MR).
3 Press [MENU].
4 Turn the Tuning control to select your desired DTMF

memory channel number from 0 to 9.

.
5
5

•
The DTMF code entry display appears and the last
digit blinks.
6
Turn the Tuning control to select a DTMF code.

•
Press [MONI/SQL] to delete the character at the
current cursor position.
•
On the transceiver display, DTMF code “ ” is
represented by “E” and “#” is represented by “F”
(TH-K2AT/ ET/ K4AT only).
•
You can also enter a DTMF code using the keypad.
Simply press your desired DTMF codes on the keypad
(TH-K2AT/ ET/ K4AT only).
7
Press [MENU] to select the DTMF code and move
the cursor to the next digit.
8 Repeat steps 6 and 7 to enter up to 16 digits.
9 To complete the entry, press [MENU] without
selecting a DTMF code.

To confirm the stored DTMF number, perform steps 1 to
4 then press [MONI/SQL]. The programmed DTMF
code scrolls through the display without transmitting.

.
Transmitting a Stored DTMF Number

Transmitting a Stored DTMF Number

•
The number stored in the channel scrolls across the
display, accompanied by DTMF tones from the
speaker.
•
After transmission, the frequency display is restored.
TH-K2AT/ ET/ K4AT only: If you do not need to confirm the
memory channel contents, press [0] ~ [9] instead of turning
the Tuning control in step 2, to select a channel number. The
stored DTMF number will be immediately transmitted. (You
do not have to press [MENU] in step 3.)

Note: If you select an empty DTMF memory channel and press
[MENU], the frequency display is restored.

.
Adjusting the DTMF Tone Transmission Speed

Adjusting the DTMF Tone Transmission Speed

Press [MENU] to enter Menu Mode.
Turn the Tuning control to select Menu No. 33

(SPD).
3 Press [MENU].
4 Turn the Tuning control to select “FA” (Fast) or “SL”

(Slow).

•
The tone duration of FAST is 50 ms and SLOW is
100 ms. “FA” (Fast) is the default setting.
5
Press [MENU] to store the setting or [PTT] to cancel.

Adjusting the Pause Duration

You can change the pause duration (a space digit)
stored in memory channels. The default setting is
500 miliseconds.

Press [MENU] to enter Menu Mode.
Turn the Tuning control to select Menu No. 35 (PA).
Press [MENU].
Turn the Tuning control to select 100, 250,

500 (default), 750, 1000, 1500, 2000 ms.
5 Press [MENU] to store the setting. Otherwise, press
[PTT] to cancel.

.
DTMF KEY LOCK

DTMF KEY LOCK

Press [MENU] to enter Menu Mode.
Turn the Tuning control to select Menu No. 36

(DT.L).
3 Press [MENU].
4 Turn the Tuning control to select “ON”.
5 Press [MENU] to store the setting or [PTT] to cancel.

When this function is activated, you cannot send DTMF
tones using [MENU] (all models) or DTMF keypad
(TH-K2AT/ ET/ K4AT) during transmission.

.
OPERATOR CONVENIENCES
OPERATOR CONVENIENCES

The transceiver switches OFF automatically if no keys
or controls are pressed or adjusted for 30 minutes
(default). One minute before the transceiver switches
OFF, warning beeps sound for a few seconds and
“APO” blinks.

You can select the APO time from OFF (disable), 30
(default), 60, 90, 120, or 180 minutes.

Press [MENU].
Turn the Tuning control to select Menu No. 17

(APO).
3 Press [MENU].
4 Turn the Tuning control to select the APO time from

OFF, 30, 60, 90, 120 or 180 minutes.

5 Press [MENU] to store the setting. Otherwise, press
[PTT] to cancel.

Note:

.
APO does not function while the transceiver is scanning.
.
The APO timer starts counting down the time when no key
presses, no control adjustments, and no PC control command
(SP/MIC jack) sequences are detected.
.
The APO warning beep sounds and “APO” appears 1 minute
before the transceiver turns OFF.
.
The APO warning beep sounds even if Menu No. 27 (BP)
{page 85} is set to “OFF”.
82

.
BATTERY LIFE

BATTERY LIFE

TX: 6 seconds, RX: 6 seconds, Stand-by: 48 seconds
We recommend you carry extra battery packs with you,
in case the battery pack becomes discharged.

Battery
Type
Output
Power
Operating Time/
Hours (Approx.)
TH-K2AT/ E/ ET TH-K4AT/ E
PB-43N
(7.2 V)
H 5.5 5.0
M 8.5 7.5
L 11.0 10.0
BT-14
(9.0 V)
H 4.0 3.0
M 8.0 7.0
L 10.5 9.5

REMAINING BATTERY CAPACITY

You can confirm the remaining battery capacity when
you transmit in low power.
To check the remaining capacity:

1 Press [F], [PTT] until “

” appears.
2 Press and hold [PTT].
• The bar-graph shows the remaining battery capacity.
83

.
: High battery power
: Medium battery power
: Low battery power

No display : Recharge or replace the batteries.
3 Release [PTT] to exit.

Note: You may not be able to transmit at high power (“ ” position) if
the battery remaining indicator shows low battery power.

BATTERY SAVER

The Battery Saver extends the operating time of the
transceiver. It automatically activates when the
squelch is closed and no key is pressed for more than
10 seconds. To reduce battery consumption, this
function shuts the receiver circuit OFF for the
programmed time, then momentarily turn it back ON to
detect a signal.

To program the receiver shut-off period for the battery
saver:

Press [MENU].
Turn the Tuning control to select Menu No. 16 (SAV).
Press [MENU].
Turn the Tuning control to select the receiver shut

off period from OFF, 0.2, 0.4, 0.6, 0.8, 1.0 (default),
2.0, 3.0, 4.0, and 5.0 seconds.
5 Press [MENU] to store the setting or [PTT] to cancel.

Note:

.
The longer the shut-off period, the more you can save on battery
consumption. However, there is a greater chance of missing a
signal.
.
When the CTCSS/ DCS code matches during reception, the
battery saver function is turned OFF.
84

.
.
u
.
Battery Saver does not function while scanning.
BEAT SHIFT

Since the transceiver uses a microprocessor to control
various functions of the transceiver, the CPU clock
oscillator’s harmonics or image may appear on some
spots of the reception frequencies {page 121}. In this
case, turn the Beat Shift function ON.

Press [MENU].
Turn the Tuning control to select Menu No. 28 (BS).
Press [MENU].
Turn the Tuning control to select “ON”.
Press [MENU] to store the setting or [PTT] to cancel.

Note: Beat Shift status can be stored to each Memory channel.

BEEP FUNCTION

The Beep function provides confirmation of entry, error
status, and malfunctions of the transceiver. We
recommend you leave this function ON in order to detect
erroneous operations and malfunctions.

However, to turn the beep function OFF:

Press [MENU].
Turn the Tuning control to select Menu No. 27 (BP).
Press [MENU].
Turn the Tuning control to select “OFF”.

The transceiver generates the following warning beeps
even if the beep function is turned OFF.

APO warning beeps {page 82}
DC voltage error beep {page 115}
Weather Alert beep {page 55}
Time-Out Timer warning beep {page 94}

Note: The beep output level is linked to the VOL control position.

BUSY CHANNEL LOCKOUT

This function is used in order to prevent transmitting on
a channel or frequency that somebody else is currently
using. When turned ON, an error beep sounds and you
cannot transmit even if you press [PTT].

1 Press [MENU] and turn the Tuning control to select
Menu No. 24 (BCL).
2 Press [MENU] and turn the Tuning control to select
“ON” or “OFF” (default).
3 Press [MENU] to store the setting or [PTT] to cancel.

FREQUENCY STEP SIZE

Choosing the correct frequency step size is essential in
order to select your exact receive frequency using the
Tuning control. You can select your desired frequency
step size from:

.
5 kHz, 6.25 kHz, 10 kHz, 12.5 kHz, 15 kHz, 20 kHz,
25 kHz, 30 kHz, 50 kHz, 100 kHz.
To change the frequency step size:

1
Press [MENU] and turn the Tuning control to select
Menu No. 1 (STP).

• The current frequency step size appears.
2 Press [MENU] and turn the Tuning control to select
your desired frequency step size.
3 Press [MENU] to store the setting or [PTT] to cancel.

Note: If you change to a frequency step size that does not match the
current operating frequency, the transceiver automatically adjusts the
frequency to match the new frequency step size.

The default step size for each model is as follows.

Model Market code Freq. Step Size
(Default)
TH-K2AT
K, K2 5 kHz
M, M2 12.5 kHz
TH-K2E E 12.5 kHz
TH-K2ET E3 12.5 kHz
TH-K4AT M2 25 kHz
TH-K4E E 25 kHz

Note: The market code is printed on the bar-code label of the carton
box.

.
LAMP

LAMP

•
If no other key is pressed, the light turns OFF
approximately 5 seconds after releasing [LAMP].
•
Press any key (including [PTT]) other than [LAMP] while
the display and keys are lit to restart the 5-second timer.
•
Press [LAMP] while the display and keys are lit to
immediately turn the light OFF.
To keep the light ON continuously:
Press [F], [LAMP].

•
The light remains ON until you press [F], [LAMP] again.
LOCK FUNCTION

The lock function disables most of the keys to prevent
you from accidentally activating a function.

1 Press [F] (1 s).

•
“
” appears when this function is ON.
•
The following keys cannot be locked:
[LAMP], [MONI/SQL], [PTT], [F] (1 s), [
] (POWER),
[F] then [LAMP] and [F] then [MONI/SQL].
2 Press [F] (1 s) to unlock the keys.
88

.
Note:

.
The Tuning control is also locked. To unlock the Tuning control
while the Lock function is ON, access Menu No. 30 (ENC)
{below} and select “ON”.
.
You cannot perform the Microprocessor Reset {page 111} while
the Lock function is ON.
.
Microphone PF keys {below} operate normally even if the Lock
function is ON.
Tuning Control Unlock

While the Lock function is ON, you sometimes may want
to turn the Tuning control to change the frequency. In
this case, turn the Tuning control unlock function ON.

Press [MENU].
Turn the Tuning control to select Menu No. 30

(ENC).
3 Press [MENU].
4 Turn the Tuning control to select “ON”.
5 Press [MENU] to store the setting or [PTT] to cancel.

MICROPHONE PF KEYS (OPTIONAL)

If you have an optional SMC-33 or SMC-34 speaker
microphone, you can access many transceiver settings
without using transceiver keys or controls. Microphone
keys 1, 2, and 3, located on the top of the microphone,
are programmable with transceiver functions.

The microphone key default assignments are as follows:
Mic [1]: VFO
Mic [2]: MR
Mic [3]: CALL (TH-K2AT/ K4AT)
1750 Hz (TH-K2E/ ET/ K4E)

.
Note:

.
Turn the transceiver OFF before connecting the optional speaker
microphone.
.
While Menu No. 31 (PC) is ”ON“ {page 107} or the Lock function
is ON {page 88}, you cannot program PF keys.
.
If the LOCK switch on the rear of the microphone is ON, you
must move the switch to the OFF position to program the keys.
1
Press one of the following key combinations to
reprogram the keys on the speaker microphone.

•
Press Mic [1]+[
] (POWER) to reprogram Mic [1].

•
Press Mic [2]+[
] (POWER) to reprogram Mic [2].

•
Press Mic [3]+[
] (POWER) to reprogram Mic [3].
2 Press a key or the key combination you want to
assign to the microphone key.

[KEY]
VFO
MR
CALL
LAMP
MONI/
SQL
PTT1
MENU
Tuning2
control

[F] + [KEY] Function
VFO M VFO Transfer
MR M.IN
CALL C.IN/ 1750 Hz
LAMP3 Lamp stays ON.
MONI/
SQL
Squelch adjustment
PTT Change power setting
MENU Reverse
Tuning2
control
Up/ Down

1 You can press [PTT] to assign a function key to alternate VFO
and Memory Recall Mode.

2 Tuning control (Up or Down) can also be programmed.

3 The light stays ON until you press [F], [LAMP] again {page 88}.

.
MONITOR

MONITOR
s

ON, weak signals may become intermittent.
If the CTCSS or DCS function is ON, you may want to
disable the squelch function temporarily to monitor the
current channel activities.

In both of these cases, use the Monitor function to
temporarily disable the squelch function.
To activate the Monitor function:

1
Press and hold [MONI/SQL].

•
The speaker is unmuted and you can monitor the
signals.
2
Release [MONI/SQL] to return to normal operation.

NARROW BAND FM OPERATION

By default, the transceiver operates in normal FM
(± 5 kHz) mode for both transmission and reception.
You can also operate the transceiver in narrow band FM
(± 2.5 kHz).

To operate the transceiver in narrow band FM:

Press [MENU].
Turn the Tuning control to select Menu No. 29

(FMN).
3 Press [MENU].
4 Turn the Tuning control to select “ON”.
5 Press [MENU] to store the setting or [PTT] to cancel.

.
When narrow band FM operation is ON, “N” appears in
the top right of the LCD.

When narrow band FM operation is ON, “N” appears in
the top right of the LCD.
Note: You can store the narrow band FM operation status to the
memory channels {page 41}.

POWER-ON MESSAGE

You can change the Power-ON Message (a maximum
of 6 characters) when the transceiver is turned ON.

1
Press [MENU].

2
Turn the Tuning control to select Menu No. 26
(P.ON.MSG).

3
Press [MENU].

•
The current message and entry cursor appear.
• The cursor moves to the next digit.
4 Turn the Tuning control to select a character.
•
You can enter the following alphanumeric characters:
0 ~ 9, A ~ Z, – (hyphen), / (slash) and a space.
5
Press [MENU].

• The cursor moves to the next digit.
6 Repeat steps 4 and 5 to enter up to 6 digits.
92

.
•
•
•
If no Power-ON Message is programmed, “TH-K2” or
“TH-K4” appears as the Power-ON Message.
7
To complete the entry, press [MENU] without
selecting a character. Otherwise press [PTT] to
cancel the entry.

PROGRAMMABLE VFO

If you want to limit the operating frequencies within a
certain range, program the upper and lower frequency
limits to the programmable VFO parameters. For
example, if you select 144 MHz for the lower limit and
145 MHz for the upper limit, the tunable range will be
limited from 144.000 MHz to 145.995 MHz.

Press [VFO].
Press [MENU].
Turn the Tuning control to select Menu No. 7

(P.VFO).

•
The current programmable frequency range for the
band appears.
4 Press [MENU].
5
Turn the Tuning control to select the lower limit
frequency in MHz.

6 Press [MENU] to store the lower limit frequency. To
cancel, press [PTT].

.
•
•
7
Turn the Tuning control to select the upper limit
frequency in MHz.

8 Press [MENU] to store the upper limit frequency or
[PTT] to cancel.

Note:

.
You cannot program the 100 kHz or lower digits.
.
The upper limit frequency cannot be set lower than the selected
lower limit frequency.
TIME-OUT TIMER

The Time-out Timer limits the time of each transmission.
The built-in Time-out Timer limits each transmission
time to a maximum of 3, 5 or 10 (default) minutes. Just
before the transceiver stops the transmission, a warning
beep sounds. This function is necessary to protect the
transceiver from thermal damage and can therefore not
be turned OFF.

Press [MENU].
Turn the Tuning control to select Menu No. 23

(TOT).
3 Press [MENU].
4 Turn the Tuning control to select “3”, “5” or “10”

(default) minutes.
5 Press [MENU] to store the setting or [PTT] to cancel.

.
Note: A warning beep sounds even if you select Menu No. 27 (BP)
OFF {page 85}.

Note: A warning beep sounds even if you select Menu No. 27 (BP)
OFF {page 85}.

You can inhibit the transmission to prevent unauthorized
individuals from transmitting, or to eliminate accidental
transmissions while carrying the transceiver.

Press [MENU].
Turn the Tuning control to select Menu No. 25 (TXI).
Press [MENU].
Turn the Tuning control to select “ON”.
Press [MENU] to store the setting or [PTT] to cancel.

•
“TX INH” appears and an error beep sounds if the
transceiver tries to transmit while TX Inhibit is ON.
TX POWER

To change the transmission output power, press [F],
[PTT].

•
Each time you press [F], [PTT] the icon cycles from
Þ
Þ
, and then back to
.

The output power varies depending on the battery type
and operating voltage. The table below shows the
approximate output power when the transceiver
operates with different types of battery or DC power
sources.

.
Battery
Type
Battery
Type Output Power (Approx.)
BT-14
(9.0 V)
H 3.5 W
M 1.2 W
L 0.3 W
PB-43N
(7.2 V)
H 5.0 W
M 1.5 W
L 0.5 W
DC IN
(13.8 V)
H 5.0 W
M 1.5 W
L 0.5 W

Note: If the DC IN voltage exceeds 14.5 V DC and “ ” (High Power)
is selected, the “ ” icon blinks and the output power is automatically
reduced to “ ” (Medium Power).

VOX (VOICE-OPERATED TRANSMISSION)

VOX eliminates the necessity of manually switching to
the Transmission Mode each time you want to transmit.
The transceiver automatically switches to Transmission
Mode when the VOX circuitry senses that you have
begun speaking into the microphone.

When you operate the VOX function, you must use an
optional microphone (KHS-21) because the internal
speaker and microphone are too near to be used for the
VOX function without using this headset.

To turn the VOX function ON:

.
1
1

2
Press [MENU] and turn the Tuning control to select
the desired VOX gain level from 1 (least sensitive) to
9 (most sensitive).

• To turn OFF the VOX function, select “OFF” in step 2.
Note:

.
While in Menu Mode {page 24}, the VOX function is temporarily
disabled.
.
Since the VOX circuit must detect the presence of your voice, you
may notice a slight delay in transmission; the very first part of
your message may not be transmitted.
.
When the VOX function is ON, the ASC function turns OFF.
.
VOX cannot be used with an optional Speaker/ Microsphone.
VOX Gain

To enjoy the VOX function, take the time to properly
adjust the VOX Gain level. This level controls the VOX
circuit to detect the presence or absence of your voice.
There are 2 ways to adjust the VOX Gain.

While the VOX function is ON:

1 Continue from step 1 and 2, above.
Press [MENU] to turn the VOX function ON, then
press any key other than [LAMP], [MONI/SQL] and
[MENU] to exit Menu Mode.
2 Speak into the headset microphone using your
normal tone of voice to transmit.

While readjusting the gain, you can release
[PTT]. The transceiver will remain in Adjustment
Mode for approximately 5 seconds.
3
Adjust the VOX Gain by turning the Tuning control
until the transceiver reliably switches to transmission
mode each time you speak while the transceiver is
transmitting.

From the Menu:

1
Continue from step 1 and 2 from VOX (Voice-
Operated Trasmission) on page 97.

2
Press [MENU] to store the VOX Gain level.

•
“VOX” appears on the bottom right of the display when
the VOX function is ON.
3
Press any key other than [LAMP], [MONI/SQL] and
[MENU] to exit Menu Mode.

4
Adjust the VOX Gain, performing steps 1 to 3 until
the transceiver reliably switches between
transmission and reception each time you speak.

•
The setting should not allow background noise to
switch the transceiver to Transmission Mode.
98

.
VOX Delay Time

VOX Delay Time
y
after you stop speaking, the end of your transmission
may not be sent. To avoid this, select an appropriate
delay time that allows your entire transmission to be
sent, before Transmission Mode ends. However, do not
make the delay overly long.

Press [MENU].
Turn the Tuning control to select Menu No. 22 (VD).
Press [MENU].
Turn the Tuning control to select the desired delay

time from 250, 500 (default), 750, 1000, 1500, 2000
and 3000 ms.

5
Press [MENU] to store the setting or [PTT] to cancel.

6
While speaking into the microphone using your
normal tone of voice, adjust the VOX delay time,
performing steps 1 to 5 until the transceiver reliably
switches between transmission and reception each
time you speak.

Note:

.
If you press [PTT] while the VOX function is ON, the VOX Delay
Time is not reflected to the transmission.
.
If you press [CALL] (if 1750 Hz is programmed) {page 35} to
transmit a 1750 Hz tone, the VOX Delay Time is not reflected.
.
If the DCS function {page 73} is ON, the transceiver remains in
Transmission Mode for the duration set by the VOX Delay Time. It
then sends a Turn-Off Code to close the receiving party’s squelch.
99

.
VOX on Busy

VOX on Busy
X
transmission even if the transceiver is receiving a
signal.

Press [MENU].
Turn the Tuning control to select Menu No. 21

(VXB).
3 Press [MENU].
4 Turn the Tuning control to select “ON”.

•
To suppress the VOX transmission when the
transceiver is receiving a signal, select “OFF”.
5
Press [MENU] to store the setting or [PTT] to cancel.

Note: You can press [PTT] or [CALL] (if 1750 Hz is programmed) to
transmit, regardless of Menu No. 21 (VXB) settings.

100

.
OPTIONAL ACCESSORIES
OPTIONAL ACCESSORIES

Battery Charger Battery Case (6 AA/ LR6)

EMC-3 HMC-3

Clip Microphone with Headset (with VOX/ PTT)
Earphone

KHS-21 KSC-24

Headset Rapid Charger

101

.
MCP-1A
PB-43N

Memory Channel Control Ni-MH Battery Pack
Software (7.2 V/ 1100 mAh)

Refer to pages 105 and 107.

PG-2W
PG-3J

DC Power Cable
Cigarette Lighter Power
Cable

PG-4Y
SMC-32

PC Interface Cable
Speaker Microphone

102

.
SMC-33 SMC-34

SMC-33 SMC-34

103

.
INTERFACING TO PERIPHERALS
INTERFACING TO PERIPHERALS

The SP/MIC jack on the transceiver can be configured
to interface to various kind of peripherals available for
the transceiver, such as a speaker microphone
(SMC-32/ 33/ 34) and PC interface cable (PG-4Y).
Access Menu No. 31 (PC) and select “ON” or “OFF”.

SP/MIC

If you plug the speaker microphone or headset into the
SP/MIC jack, access Menu No. 31 and select “OFF”
(default). To emulate the programmable function keys
using external keys (to control the transceiver), refer to
the circuit diagram below.

5.0 V 10 m F
PTT
LOCK SWSW-1 3.9k
SW-2 10k
SW-3 27k
2.5 mm
Plug
3.5 mm
Plug
Speaker

SP/MIC jack

MIC

Microphone

Note 1 Note 2

104

.
Note 1: Voltage is developed across a 100W resistor on the 5 V line in
the transceiver. When 2 mA flows, approximately 4.8 V is developed.

Note 1: Voltage is developed across a 100W resistor on the 5 V line in
the transceiver. When 2 mA flows, approximately 4.8 V is developed.

When other equipment has DC blocking capacitors.
When a 2-terminal electret condenser microphone is used.

To connect the transceiver to a PC in order to manage
the memory channels in the transceiver, use the PG-4Y
PC interface cable. You will also need the supported
software to manage the memory channel contents of the
transceiver. To download the software, access the
following URL:
http://www.kenwood.com/i/products/info/amateur.htm.

To use the software, access Menu No. 31 and select

“ON” {page 107}.
For your reference, the following diagram shows how
the transceiver communicates to the PC using a serial
(COM) port.

Level

SP/MIC jack

MIC

converter

RXD

DTR

2.5 mm
Plug

DSR
GND

COM port

RTS

3.5 mm
Plug

CTS
TXD

Note: Contact an authorized KENWOOD dealer for the PG-4Y, PC
Interface cable availability.

105

.
n n
Use the PG-4Y PC interface cable to connect
between the transceiver and PC. Plug the Speaker/
Microphone connector to the SP/MIC jack and DB-9
connector to one of the COM (serial) ports on your
PC.

106

.
¦
n
When the transceiver is connected to a PC in order
to use the MCP-1A (Memory Channel Control
Program) software, you must configure the SP/MIC
jack function prior to using the software.

Press [MENU].
Turn the Tuning control to select Menu No. 31

(PC).
3 Press [MENU].
4 Turn the Tuning control to select “ON”.

5
Press [MENU] to store the setting or press [PTT]
to cancel.

6
Press any key other than [LAMP], [MONI/SQL],
and [MENU] to exit Menu Mode.

Note: If you use an optional Speaker/ Microphone after using
the MCP software, select “OFF” in step 4. Otherwise, the
Speaker/ Micrphone does not function properly.

107

.
TROUBLESHOOTING
TROUBLESHOOTING

Your transceiver has been factory aligned and tested to
specification before shipment. Under normal
circumstances, the transceiver will operate in
accordance with these operating instructions. All
adjustable trimmers, coils and resistors in the
transceiver were preset at the factory. They should only
be readjusted by a qualified technician who is familiar
with this transceiver and has the necessary test
equipment. Attempting service or alignment without
factory authorization can void the transceiver warranty.

When operated properly, the transceiver will provide
years of service and enjoyment without requiring further
realignment. The information in this section gives some
general service procedures requiring little or no test
equipment.

Service

If it is ever necessary to return the equipment to your
dealer or service center for repair, pack the transceiver
in its original box and packing material. Include a full
description of the problems experienced. Include your
telephone number, fax number, and email address (if
available) along with your name and address in case the
service technician needs to contact you for further
information while investigating your problem. Do not
return accessory items unless you feel they are directly
related to the service problem.

You may return your transceiver for service to the
authorized KENWOOD dealer from whom you
purchased it or to any authorized KENWOOD service

108

.
center. A copy of the service report will be returned with
the transceiver. Please do not send subassemblies or
printed circuit boards; send the complete transceiver.

center. A copy of the service report will be returned with
the transceiver. Please do not send subassemblies or
printed circuit boards; send the complete transceiver.

Service Note

If you desire to correspond on a technical or operational
problem, please make your note short, complete, and to
the point. Help us help you by providing the following:

Model and serial number of equipment
Question or problem you are having
Other equipment in your station pertaining to the

problem
4 Meter readings
5 Other related information (menu setup, mode,

frequency, key sequence to induce malfunction, etc.)

Do not pack the equipment in crushed newspapers for shipment!
Extensive damage may result during rough handling or shipping.
Note:

.
Record the date of purchase, serial number and dealer from
whom the transceiver was purchased.
.
For your own information, retain a written record of any
maintenance performed on the transceiver.
.
When claiming warranty service, please include a photocopy of
the bill of sale or other proof-of-purchase showing the date of
sale.
109

.
Cleaning

Cleaning

BACKUP BATTERY

This transceiver uses an EEPROM to store memory
channel data, menu configurations, and all necessary
operation parameters. So, you never have to worry
about replacing back-up batteries to operate the
transceiver.

110

.
MICROPROCESSOR RESET

MICROPROCESSOR RESET

Initial Settings

The factory defaults for the operating frequencies are as
follows:

TH-K2AT/ E/ ET: 144.000 MHz
TH-K4AT/ E: 430.000 MHz

The Memory channels have no data stored. The
Weather Radio frequency (AL channel) is restored as

162.550 MHz (TH-K2AT K/ K2 only). Refer to pages 53,
55 and 87 for the Call Channel, Weather Radio
frequency and frequency step size default values.
Full Reset

This resets all transceiver parameters to the factory
default values.

VFO Reset

This resets the transceiver parameters excluding the
stored DTMF Number in Memory {page 77} and
memory channel contents.

Note: While transceiver is operating in the Channel Display Mode
{page 57}, you cannot reset the transceiver.

111

.
Performing Reset

Performing Reset

When the transceiver is turned OFF:

¦
Full reset
1 Press [F]+[

] (POWER).
• All indicators are lit.
2 Release [F].
•
The full reset confirmation message, “FL.RST?”,
appears.
3
Press [F] to proceed.

•
“SURE ?” appears.
•
Press any key other than [F], [LAMP] and
[MONI/SQL] to exit the Reset Mode.
4
Press [F] to reset the transceiver.

112

.
¦
n
1 Press [VFO]+[

] (POWER).
2 Release [VFO].
•
The VFO reset confirmation message, “VF.RST?”,
appears.
3
Press [VFO] to proceed.

•
“SURE ?” appears.
•
Press any key other than [VFO], [LAMP] and
[MONI/SQL] to exit the Reset Mode.
4
Press [VFO] to reset the transceiver.

113

.
Reset using the Menu

Reset using the Menu
.
2 Turn the Tuning control to select Menu No. 99

(RESET).

3
Press [MENU].

4
Turn the Tuning control to select the Reset Mode,

“FULL” or “VFO”.
5 Press [MENU] to select the Reset Mode.

•
“SURE ?” appears.
•
Press any key other than [MENU], [LAMP] and
[MONI/SQL] to exit the Reset Mode.
6
Press [MENU] to reset the transceiver.

114

.
OPERATION NOTICES

OPERATION NOTICES

Operating Voltage

As stated in “SPECIFICATIONS” {page 122}, this
transceiver operates on 6.0 V ~ 9.0 V DC (battery
terminal) or 12.0 V ~ 16.0 V DC (DC IN jack). If you
find that the transceiver cannot be switched ON, or
“DC ERR” appears, the supplied power source may be
outside of the specified range.

In such a case, remove the DC power cable from the
transceiver immediately and confirm that the power
source voltage is within the specified range.

If you are using a variable DC power supply to operate
the transceiver, adjust the DC power supply voltage to

13.8 V DC. Considering the output power efficiency and
thermal characteristics of the transceiver, this is the
optimal voltage to operate the transceiver. If the voltage
at DC IN jack exceeds 14.5 V, the transceiver output
power is automatically reduced to “
” power.
Receiving Signals in Cities

When you receive signals in cities, the receiver’s entire
S-meter may light up without receiving any strong
signals. This happens when the RF amplifier in the
receiver is overloaded by strong interference signals
that are nearby.

115

.
Transmission

Transmission

” also blinks at the same time. If this happens, let the
transceiver cool down for a while before transmitting
again.
Internal Beats

On some spots of the frequency {page 121}, the
S-meter moves without receiving any signals or you
cannot receive any signals. This is inevitable when you
use super-heterodyne receivers. If this happens,
access Menu No. 28 (BS) and select “ON”.

116

.
TROUBLESHOOTING

TROUBLESHOOTING

Note: Placing powered PC peripherals near this transceiver may
cause noise in the transceiver.

Problem Solution Ref.
Page
Nothing appears on the
display when the transceiver
is switched ON, or the
display is blinking ON and
• The battery pack is
Recharge thedischarged.
battery pack or replace the
batteries.
2, 6
OFF. • The DC cable or connection is
Replace the cable.bad.
8
• The power supply fuse is open
Investigate the cause(blown).
for the open fuse and replace
the fuse.
9
Most keys and the Tuning • Transceiver Lock function is 88
control do not function. ” icon is visible).ON (the “
Press [F] (1 s) to turn OFF
Transceiver Lock.
• The transceiver is in Channel
PressDisplay Mode.
][PTT]+[MR]+[ (POWER) to
exit Channel Display Mode.
57

117

.
Problem Problem Ref.
Page
You cannot select the exact
desired frequency using the
Tuning control.
• The current frequency step
size does not allow the
frequency to be selected.
Select an appropriate
frequency step size in Menu
No. 1 (STP).
87
• Programmable VFO frequency
Expandrange is too narrow.
the frequency range in Menu
No. 7 (P.VFO).
93
You cannot recall any • You have stored no data in 44
memory channel. any of the memory channels.
Store the desired frequencies
in the memory channels.
The receiving sound volume
is weak even if the signal is
strong.
• The receiving station may be
operating in narrow band FM
Access Menu No.bandwidth.
29 (FMN) and select “ON”.
91
Turning the VOL control
does not allow you to hear
audio.
• The selective call function
Turn(CTCSS or DCS) is ON.
OFF the selective call function.
69
Even if the Speaker/
Microphone is plugged into
the SP/MIC jack, you cannot
transmit/ receive (and/ or
remote control) through the
Speaker/ Microphone.
• The transceiver is in PC Mode.
Access Menu No. 31 (PC) and
select “OFF”.
107

118

.
Problem Problem Ref.
Page
You cannot transmit by • You selected a frequency 20
pressing [PTT]. outside the allowable range.
Select a frequency within the
allowable transmit frequency
range.
• You selected a transmit offset
that places the transmit
frequency outside the limit.
Select a proper offset direction
or offset frequency.
33
• AccessTX inhibit is ON.
Menu No. 25 (TXI) and select
“OFF”.
95
• The battery pack voltage is too
Change orlow to transmit.
replace the battery pack.
2, 6
Repeater cannot be • Wrong tone frequency is 35
accessed. Select a properselected.
repeater access tone.
• Wrong repeater offset
Accessfrequency is selected.
Menu No. 8 (OFFSET) and
select an appropriate offset
frequency.
33
• Wrong shift direction is
Try other shiftselected.
directions.
32
DTMF tone cannot be
transmitted.
• AccessDTMF Lock is ON.
Menu No. 36 (DT.L) and select
“OFF”.
81

119

.
Problem Problem Ref.
Page
Repeater does not accept • DTMF tone transmission 80
your DTMF tones. Accessduration is too short.
Menu No. 33 (SPD) and select
“SL” (SLOW).
Transceiver transmits
without pressing [PTT].
• AccessVOX function is ON.
Menu No. 20 (VOX) and select
“OFF”.
96
The transceiver switches • The Automatic Power OFF 82
OFF for no apparent reason. Access(APO) function is ON.
Menu No. 17 (APO) and select
your desired time length or
“OFF”.
The transceiver returns to • The transmission time 94
Reception Mode during a exceeded the programmed
long transmission. Access Menu No.TOT time.
23 (TOT) to select your
desired transmission length.
The TOT cannot be turned
OFF, protecting the
transceiver from the thermal
damage.
The Scan function does not • You have selected “SE” 68
resume scanning after the (SEEK) for Menu No. 11
transceiver detects a signal. Select either “TO”(SCAN).
(Time-Operated) or “CO”
(Carrier-Operated) for Menu
No. 11 (SCAN).

120

.
INTERNAL BEATS FREQUENCY LIST

INTERNAL BEATS FREQUENCY LIST

140.800 MHz, 153.600 MHz, 166.400 MHz,
168.350 MHz
TH-K4AT/ E

453.250 MHz
121

.
SPECIFICATIONSÊ
SPECIFICATIONSÊ
l
TH-K2AT
Market code K, K2 M, M2
Number of memory
channels
100 (50) +
9 special
function
memories
100 (50) +
8 special
function
memories
Antenna impedance
(Connector type)
50W (SMA)
Operating
Voltage
DC IN jack
DC 12.0 ~ 16.0 V
(13.8 V nominal)
Battery
terminal
DC 6.0 ~ 9.0 V
(7.2 V nominal)
Grounding method Negative ground
Current
Transmit with
H, 13.8 V
(DC IN)
1.8 A or less
Transmit with
H, 7.2 V
(PB-43N)
2.0 A or less
Transmit with
M, 7.2 V
(PB-43N)
1.5 A or less
Transmit with
L, 7.2 V
(PB-43N)
0.8 A or less

122

.
General
TH-K2AT
Market code K, K2 M, M2
Current
Receive
(no signal)
100 mA or less
Battery Saver
ON (Average)
30 mA or less
Usable temperature range
–20° C ~ 60° C
(–4° F ~ 140° F)
–10° C ~ 60° C
(+14° F ~ 140° F)
with PB-43N
Frequency stability
Within ± 5ppm
(–20° C ~ 60° C)
Dimensions
(W x H x D including
Projections)
58 x 110 x 35.8 mm/
2 7/16" x 4 6/16" x 1 7/16"
with PB-43N
58 x 110 x 37 mm/
2 7/16" x 4 6/16" x 1 1/2"
with BT-14
Weight
Approx. 320 g/ 11.3 oz.
with PB-43N
Approx. 320 g/ 11.3 oz.
with BT-14

Note: All specifications (General, Transmitter and Receiver) are
guaranteed within the amateur radio band.

123

.
Transmitter
TH-K2AT
Market code K, K2 M, M2
Transmission Mode F3E (FM)/ F2D (FM)
Frequency range
144 ~ 148
MHz
136 ~ 174
MHz
Output
Power
DC IN jack
(13.8 V)
H: 5.0 W (approx.)
M: 1.5 W (approx.)
L: 0.5 W (approx.)
PB-43N
(7.2 V)
H: 5.0 W (approx.)
M: 1.5 W (approx.)
L: 0.5 W (approx.)
BT-14
(9.0 V)
H: 3.5 W (approx.)
M: 1.2 W (approx.)
L: 0.3 W (approx.)
Modulation Reactance
Maximum frequency
deviation
± 5 kHz (FM)/
± 2.5 kHz (NFM)
Spurious emissions
–60 dB or less
(H and M power)
–50 dB or less
(L power)
Microphone impedance 2kW

124

.
Receiver
TH-K2AT
Market code K, K2 M, M2
Reception Mode F3E (FM)/ F2D (FM)
Frequency range 136 ~ 174 MHz
Intermediate Frequency
(IF)
1st IF: 38.85 MHz
2nd IF: 450 kHz
Circuit type Double super-heterodyne
Sensitivity
FM (12 dB SINAD)
2 m amateur radio band:
0.18 m V or less
Squelch sensitivity
0.13 m V or less
(within 2 m amateur
radio band)
Selectivity
FM (normal)
–6 dB/ 10 kHz or less
–40 dB/ 28 kHz or less
(within 2 m amateur
radio band)
FMN (narrow)
–6 dB/ 10 kHz or less
–40 dB/ 28 kHz or less
(within 2 m amateur
radio band)
Audio output
(10% distortion)
400 mW or higher
(7.2 V, 8W load)

125

.
General
TH-K2E TH-K2ET
Market code E E3
Number of memory
channels
100 (50) + 8 special
function memories
Antenna impedance
(Connector type)
50W (SMA)
Operating
Voltage
DC IN jack
DC 12.0 ~ 16.0 V
(13.8 V nominal)
Battery
terminal
DC 6.0 ~ 9.0 V
(7.2 V nominal)
Grounding method Negative ground
Current
Transmit with
H, 13.8 V
(DC IN)
1.8 A or less
Transmit with
H, 7.2 V
(PB-43N)
2.0 A or less
Transmit with
M, 7.2 V
(PB-43N)
1.5 A or less
Transmit with
L, 7.2 V
(PB-43N)
0.8 A or less

126

.
General
TH-K2E TH-K2ET
Market code E E3
Current
Receive
(no signal)
100 mA or less
Battery Saver
ON (Average)
30 mA or less
Usable temperature range
–20° C ~ 60° C
(–4° F ~ 140° F)
–10° C ~ 60° C
(+14° F ~ 140° F)
with PB-43N
Frequency stability
Within ± 5ppm
(–20° C ~ 60° C)
Dimensions
(W x H x D including
Projections)
58 x 110 x 35.8 mm/
2 7/16" x 4 6/16" x 1 7/16"
with PB-43N
58 x 110 x 37 mm/
2 7/16" x 4 6/16" x 1 1/2"
with BT-14
Weight
Approx. 320 g/ 11.3 oz.
with PB-43N
Approx. 320 g/ 11.3 oz.
with BT-14

Note: All specifications (General, Transmitter and Receiver) are
guaranteed within the amateur radio band.

127

.
Transmitter
TH-K2E TH-K2ET
Market code E E3
Transmission Mode F3E (FM)/ F2D (FM)
Frequency range 144 ~ 146 MHz
Output
Power
DC IN jack
(13.8 V)
H: 5.0 W (approx.)
M: 1.5 W (approx.)
L: 0.5 W (approx.)
PB-43N
(7.2 V)
H: 5.0 W (approx.)
M: 1.5 W (approx.)
L: 0.5 W (approx.)
BT-14
(9.0 V)
H: 3.5 W (approx.)
M: 1.2 W (approx.)
L: 0.3 W (approx.)
Modulation Reactance
Maximum frequency
deviation
± 5 kHz (FM)/
± 2.5 kHz (NFM)
Spurious emissions
–60 dB or less
(H and M power)
–50 dB or less
(L power)
Microphone impedance 2kW

128

.
Receiver
TH-K2E TH-K2ET
Market code E E3
Reception Mode F3E (FM)/ F2D (FM)
Frequency range 144 ~ 146 MHz
Intermediate Frequency
(IF)
1st IF: 38.85 MHz
2nd IF: 450 kHz
Circuit type Double super-heterodyne
Sensitivity
FM (12 dB SINAD)
2 m amateur radio band:
0.18 m V or less
Squelch sensitivity
0.13 m V or less
(within 2 m amateur
radio band)
Selectivity
FM (normal)
–6 dB/ 10 kHz or less
–40 dB/ 28 kHz or less
(within 2 m amateur
radio band)
FMN (narrow)
–6 dB/ 10 kHz or less
–40 dB/ 28 kHz or less
(within 2 m amateur
radio band)
Audio output
(10% distortion)
400 mW or higher
(7.2 V, 8W load)

129

.
General
TH-K4AT TH-K4E
Market code M2 E
Number of memory
channels
100 (50) + 8 special
function memories
Antenna impedance
(Connector type)
50W (SMA)
Operating
Voltage
DC IN jack
DC 12.0 ~ 16.0 V
(13.8 V nominal)
Battery
terminal
DC 6.0 ~ 9.0 V
(7.2 V nominal)
Grounding method Negative ground
Current
Transmit with
H, 13.8 V
(DC IN)
1.8 A or less
Transmit with
H, 7.2 V
(PB-43N)
2.0 A or less
Transmit with
M, 7.2 V
(PB-43N)
1.5 A or less
Transmit with
L, 7.2 V
(PB-43N)
0.8 A or less

130

.
General
TH-K4AT TH-K4E
Market code M2 M
Current
Receive
(no signal)
100 mA or less
Battery Saver
ON (Average)
30 mA or less
Usable temperature range
–20° C ~ 60° C
(–4° F ~ 140° F)
–10° C ~ 60° C
(+14° F ~ 140° F)
with PB-43N
Frequency stability
Within ± 5ppm
(–20° C ~ 60° C)
Dimensions
(W x H x D including
Projections)
58 x 110 x 35.8 mm/
2 7/16" x 4 6/16" x 1 7/16"
with PB-43N
58 x 110 x 37 mm/
2 7/16" x 4 6/16" x 1 1/2"
with BT-14
Weight
Approx. 320 g/ 11.3 oz.
with PB-43N
Approx. 320 g/ 11.3 oz.
with BT-14

Note: All specifications (General, Transmitter and Receiver) are
guaranteed within the amateur radio band.

131

.
Transmitter
TH-K4AT TH-K4E
Market code M2 E
Transmission Mode F3E (FM)/ F2D (FM)
Frequency range
400 ~ 470
MHz
430 ~ 440
MHz
Output
Power
DC IN jack
(13.8 V)
H: 5.0 W (approx.)
M: 1.5 W (approx.)
L: 0.5 W (approx.)
PB-43N
(7.2 V)
H: 5.0 W (approx.)
M: 1.5 W (approx.)
L: 0.5 W (approx.)
BT-14
(9.0 V)
H: 3.5 W (approx.)
M: 1.2 W (approx.)
L: 0.3 W (approx.)
Modulation Reactance
Maximum frequency
deviation
± 5 kHz (FM)/
± 2.5 kHz (NFM)
Spurious emissions
–60 dB or less
(H and M power)
–50 dB or less
(L power)
Microphone impedance 2kW

132

.
Receiver
TH-K4AT TH-K4E
Market code M2 E
Reception Mode F3E (FM)/ F2D (FM)
Frequency range
400 ~ 470
MHz
430 ~ 440
MHz
Intermediate Frequency
(IF)
1st IF: 38.85 MHz
2nd IF: 450 kHz
Circuit type Double super-heterodyne
Sensitivity
FM (12 dB SINAD)
within 70 cm band:
0.18 m V or less
Squelch sensitivity
0.13 m V or less
(within 70 cm amateur
radio band)
Selectivity
FM (normal)
–6 dB/ 10 kHz or less
–40 dB/ 28 kHz or less
(within 70 cm amateur
radio band)
FMN (narrow)
–6 dB/ 10 kHz or less
–40 dB/ 28 kHz or less
(within 70 cm amateur
radio band)
Audio output
(10% distortion)
400 mW or higher
(7.2 V, 8W load)

133

.
INDEXÊ
INDEXÊ

All-Channel Scan ......................................................... 63
Alkaline Batteries, Installing ............................................ 2
APO (Menu No. 17) ..................................................... 82
ARO (Menu No. 9) ....................................................... 37
ASC (Automatic Simplex Check) .................................. 38
Automatic Dialer........................................................... 77

Band Scan ................................................................... 60

Battery

Installing the Alkaline ................................................. 2

Installing the PB-43N Ni-MH, Pack ............................ 1

Life ......................................................................... 83

Remaining .............................................................. 83

Saver ...................................................................... 84
BCL (Menu No. 24) ...................................................... 86
Beat Shift ..................................................................... 85
Beep Function.............................................................. 85
Belt Clip, Installing the .................................................... 5
BP (Menu No. 27) ........................................................ 85
BS (Menu No. 28) ........................................................ 85
Busy Channel Lockout ................................................. 86
C
Call Channel, Recalling ................................................ 53
Call Scan ..................................................................... 64
Carrier-Operated Mode ................................................ 68
Channel Display ........................................................... 57
Charging the PB-43N Ni-MH Battery Pack ..................... 6
Cigarette Lighter Socket ................................................. 8
CK (Menu No. 18) ........................................................ 36

134

.
Clearing

Clearing

Freq. ID Scan.......................................................... 72

Selecting a, Frequency ........................................... 70

Using ...................................................................... 69
D
DC IN jack ........................................................ 6, 12, 115
DCS (Menu No. 5)

Code ID Scan ......................................................... 75

Selecting a, Code .................................................... 74

Using ...................................................................... 73
Direct Frequency Entry ................................................ 21
Display

LCD ........................................................................ 14
DT.H (Menu No. 34) ..................................................... 77
DT.L (Menu No. 36) ...................................................... 81
DTMF

Adjusting the Pause Duration .................................. 80

Adjusting the, Tone Transmission Speed ................. 80

Automatic Dialer...................................................... 77

Key Lock ................................................................. 81

Manual Dialing ........................................................ 76

Storing a, Number in memory ................................. 77

Transmitting a Stored, Number................................ 79

TX hold ................................................................... 77
DTMF.MR (Menu No. 32) ............................................. 77

ENC (Menu No. 30) ..................................................... 89

First QSO..................................................................... 10
FMN (Menu No. 29) ..................................................... 91

135

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Frequency Step Size .................................................... 86
Full Reset ...................................................................111

HLD (Menu No. 19) ...................................................... 36

Installing
the Alkaline Batteries................................................. 2
the Antenna .............................................................. 4
the Belt Clip .............................................................. 5
the PB-43N Ni-MH Battery Pack ............................... 1

Internal Beats......................................................116, 121

Keys and Control ................................................... 12, 13

Lamp ........................................................................... 88
Lock Function .............................................................. 88
L.OUT (Menu No. 12)................................................... 67

Manual Dialing ............................................................. 76
M.CH (Menu No. 13) .................................................... 41
MDF (Menu No. 15) ..................................................... 49
Memory Channel

Lockout ................................................................... 67
Naming a ................................................................ 48
Recalling ................................................................. 46
Transfer .................................................................. 50

Menu
Access .................................................................... 24
Function List ........................................................... 26

Meter ..................................................................... 15, 83
MHz Mode ................................................................... 20
Microphone PF Keys (optional) .................................... 89
Microprocessor Reset .................................................111

136

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M.NAME (Menu No. 14) ............................................... 48

Narrow Band FM Operation ......................................... 91
Normal Scan ................................................................ 60

Odd-split Frequency ..................................................... 42
Offset

Programming .......................................................... 32

Programming Flow .................................................. 32

Selecting, Direction ................................................. 32

Selecting, Frequency .............................................. 33
OFFSET (Menu No. 8) ................................................. 93
Operating Voltage ...................................................... 115
Optional Accessories.................................................. 101

PA (Menu No. 35) ......................................................... 80
PC (Menu No. 31) ...................................................... 107
PF Keys, Microphone (Optional) .................................. 89
P.ON.MSG (Menu No. 26) ............................................ 92
Power ON/ OFF ........................................................... 17
PRI (Menu No. 10) ....................................................... 66
Priority Channel

Programming .......................................................... 65

Using, Scan ............................................................ 65
Priority Scan ................................................................ 65
Program Scan

Storing, Frequency Range ...................................... 61
Programmable VFO ..................................................... 93
P.VFO (Menu No. 7) ..................................................... 93
R
Recalling

Call Channel ........................................................... 53

Memory Channel .................................................... 46

137

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Regulated Power Supply ................................................ 9
Repeater Offset, Automatic .......................................... 37
Repeater Operation ..................................................... 31
Reprogramming

Regulated Power Supply ................................................ 9
Repeater Offset, Automatic .......................................... 37
Repeater Operation ..................................................... 31
Reprogramming

Full ....................................................................... 112

VFO ...................................................................... 113
RESET (Menu No. 99) ............................................... 114
Reverse Function ......................................................... 38

SAV (Menu No. 16) ...................................................... 84
Scan

All-Channel ............................................................. 63

Band ....................................................................... 60

Call ......................................................................... 64

Carrier-Operated Mode ........................................... 68

Seek Mode ............................................................. 68

Time-Operated Mode .............................................. 68
SCAN (Menu No. 11) ................................................... 68
SFT (Menu No. 6) ........................................................ 32
Simplex

Storing, Frequencies or Standard ............................ 44
SPD (Menu No. 33) ...................................................... 80
Specifications ............................................................. 122
Squelch, Adjusting ....................................................... 18
Supplied Accessories ....................................................vii
SP/MIC .......................................................... 12, 89, 104
STP (Menu No. 1) ........................................................ 86
Switching Power ON/ OFF ........................................... 17

T (Menu No. 3) ....................................................... 34, 35
T.CT.DCS (Menu No. 2) ................................... 34, 69, 73

138

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Time-Operated Mode ................................................... 68
Time-out Timer ............................................................. 94
Tone

Time-Operated Mode ................................................... 68
Time-out Timer ............................................................. 94
Tone
4
Freq. ID Scan.......................................................... 39
Selecting a, Frequency ........................................... 35
Transmit a 1750 Hz ................................................. 36
TOT (Menu No. 23) ...................................................... 94
Transmitting ................................................................. 19
Troubleshooting ......................................................... 108
Tuning Control Unlock .................................................. 89
TXI (Menu No. 25) ....................................................... 95
TX Inhibit ..................................................................... 95
TX Power ..................................................................... 95

VD (Menu No. 22) ........................................................ 99

VFO
Mode ...................................................................... 20
Programmable ........................................................ 93
Reset .....................................................................111

Volume
Adjusting ................................................................. 17

VOX (Voice-Operated Transmission)
Delay Time .............................................................. 99
Gain ........................................................................ 97
on Busy ................................................................ 100

VOX (Menu No. 20) ..................................................... 96
VXB (Menu No. 21) .................................................... 100

WX .............................................................................. 55
WXA (Menu No. 37) ..................................................... 56

1750 Hz ....................................................................... 36

139

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