Kenwood TH-77A User manual

GOO/ANAD
144/430MHz FM DUAL BANDER
144/440MHz FM DUAL BANDER
TH-77A
144/430MHz FM DUAL BANDER
TH-77E
INSTRUCTION MANUAL
KENWOOD CORPORATION
©PRINTED IN JAPAN B62-0007-10(A,T)(K,P,T)
922 1110987654321 9112111098765

FCC WARNING
This equipment may generate or use 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.
Press the
power
switch for
longer than
0.1 second
to turn the
transceiver
on or off.
CAUTION
During fixed station operation, the supplied antenna may cause
interference to nearby electronic equipment. It can also increase
the supply voltage from an external D.C. power supply. To avoid
these conditions, a low gain external antenna can be used. A gain
type antenna can lead to intermodulation distortion.
2

CONTENTS
1. BEFORE OPERATION
2. SPECIFICATIONS and ACCESSORIES
3. BATTERY PACK
4. OPERATION
44
4-2 RECEIVER OPERATION
4-3 TRANSMITTER OPERATION
4-4
4-5 SCAN
OPERATING CONTROLS ............
Receiver Operation
Frequency Selection
Frequency Step Selection
Programmable VFO Tuning Limits
A.B.C.( Automatic Band Change )
UXU(430MHz Band Simultaneous Reception)
MEMORY
Microprocessor Memory Back-up
Microprocessor Initialization | Memory
Channel Memory Contents Memory Entry
Memory Channel Recall Memory Shift
Memory Recall when the Keyboard Cover is
Installed
Scan Options Hold/Resume Programming
Band Scan Programmable Band Scan MHz
Scan Memory Channel Scan VFO/Memory
Channel Scan Call Scan
V/M/C (VFO/ Memory /Call) Scan Memory
Channel Lockout Priority Alert Function
4-10
4-11
4-12
6. MAINTENANCE
7. OPTIONAL ACCESSORIES
REPEATER OPERATION: steer, cprtee geen een
Transmitter Offsets Reverse Function Tone
and CTCSS Operation Autopatch Operations
DTMF MEMORY FUNCTION
DTSS
DTSS Code DTSS Code Selection Using the
DTSS Function Using DTSS with a Repeater
PAGING
Paging Code Memories Setting the Paging
Code Paging Transmission (Calling) Paging
Reception (Wait) Code Lockout
TONE ALERT SYSTEM
BATTERY SAVER
AUTOMATIC POWER OFF
5. BLOCK DIAGRAM and SCHEMATIC DIAGRAM
another sheet
In Case of Difficulty
4
49

1. BEFORE OPERATION
Thank you for purchasing this new transceiver.
IMPORTANT
Please read this instruction manual carefully before
placing your transceiver in service.
CAUTION
Long transmission or extended operation in the HI
power mode might cause the rear of this transceiver
to get warm. Do not place the transceiver where the
heat sink ( rear panel ) might come in contact with
plastic or vinyl surfaces.
SAVE THIS INSTRUCTIGN MANUAL.
2. SPECIFICATIONS and ACCESSORIES
2-1. SPECIFICATIONS
440/430MHz
band
GENERAL 144MHz band
U.S.A. Version 144 to 148 438 to 450
FREQUENCY
RANGE (MHz)
144 to 146 430 to 440
430 to 440
or 438 to 450
F3E (FM)
502
— 20°C ~ + 60°C (— 4°F~ 140°F)
7.2 V ~ 16 VDC (13.8 VDC)
6.3 V ~ 16 VDC (7.2VDC)
U.K.and Europe
144 to 148
Other market
MODE
ANTENNA IMPEDANCE
OPERATING TEMPERATURE
POWER aS IN (nominal)
REQUIREMENTS |" BatTERy PACK
This Instruction Manual covers the following models:
TH-77A : 144/440 MHz FM DUAL BANDER with
CTCSS unit. (U.S.A.and Canadian version)
TH-77A : 144/430 MHz FM DUAL BANDER.
Yotnei maMedy
TH-77E: 144/430MHz FM DUAL BANDER.
(U.K.and European version)
The following explicit definitions apply in this manual:
OTE If disregarded, inconvenience only, no risk of equip-
ment damage or personal injury.
CAUTION Equipment damage may occur, but not personal in-
jury.
CURRENT DRAIN
13.8VDC (Ext.Power Supply) H
7.2VDC (Battery) H
Transmit mode L
SIMPLEX
Receive mode with no sianal
SIMPLEX Battery Save mode
DUPLEX
Receive mode with no signal
Approx. 1.5A | Approx. 1.6A
Approx. 1A Approx. 1A
Approx. 0.5A | Approx. 0.54
Agorox. 60mAAgarax. 65.A
Approx. 18mA]Approx. 20mA
Approx. Approx.
120mA 120mA
Battery Save mode |Approx. 30mA/Approx. 30mA
DUPLEX
GROUND
DIMENSION (W xH x D)
Negative
58x 140.5 x 29.5 mm

DIMENSION ( Projection Included ) 68.5 x 154.5 x39mm
MICROPHONE INPEDANCE
TRANSMITTER
H (13.8VDC)
more than 5W
OUTPUT
ek H (7.2VDC) Approx. 1.5W
Approx. 0.5W
MODULATION
MAXIMUM FREQUENCY DEVIATION
SPURIOUS RADIATION
RECEIVER
Reactance
+ SkHz
less than — 60dB
double conversion super-
SIREOURY: heterodyne
INTERMEDIATE FREQUENCY 1STIF | 45.05MHz
INTERMEDIATE FREQUENCY 2 ND IF
less than
- 16dBy
(0.16pV)
UxU MODE ;
less than
-11dBh
(0.28pV)
SQUELCH SENSITIVITY less than — 20dBy(0.1pV)
SELECTIVITY -—6dB more than 12kHz
SELECTIVITY -—60dB less than 24kHz
AUDIO OUTPUT POWER More than 200 mw
(10% distortion) (across 8Q load )
NOTES: 1. Circuit and ratings are subject to change without notice,
due to development in technology.
2. Recommended duty cycle : 1 minute Transmission, 3
minutes Reception
less than
-15dBp
(0.18pV)
SENSITIVITY (12dB SINAD)
2-2. ACCESSORIES
Unpack your new transceiver carefully and examine it for
visible damage. If the equipment has been damaged in
shipment, notify the transportation company immediately.
Save the boxes and packing material for future shipping.
The following accessories should have been included in
the box with the transceiver:
AGHOBDE fo cate oe ae ewe sa T90-0414-XX 4
Belt Maat... Ge. eae J29-0424-XX 1
FANGS EA 0 coco: cy «heen J69-0312-XX 1
Keyboard Cover .......... FO7-1202-XX 1
Bottom:Govery css siejecjaa.s FO7-0896-XX 1
MEESTER 90K coma. ste ies ONE 1
(PB-6) for U.S.A. and Canada W09-0507-XX
(PB-10) for other market ..... WO09-0535-XX
Battery CHatge rr a. a. a a ono ae MIRE ous 1
(BC-9)
for. U-S.AsG20V) .) ack. W09-0382-XX
for Canada (120V) ........ W09-0385-XX
(BC-2)
for Europe (220V) ........ W09-0317-XX
POF LK. (PAOW os oS. aces W09-0318-XX
for Oceania (240V) ....... W09-0527-XX
(BC-12)
for other market (120/240V) W09-0534-XX
AC plug (M type only) ..... E19-0254-xX .. 1
Instruction Manual ....... B62-0007-XX .. 1
Warranty Card (U.S.A., Canada, and Europe) .. 1

3. BATTERY PACK
MNi-Cd BATTERY PACK(PB-10)
This battery pack has not been charged at the factory in
order to provide you with the greatest number of
charge / discharge cycles. You must charge the battery
before use. The battery pack will require several
charge / discharge cycles before you can expect to see
the maximum operating period between charges. If the
battery will be stored for longer than 2 months it
should be recharged before use.
m@ RECHARGING
CAUTION (for general market only)
The BC-12 has a voltage selection switch ( 120V /
230V). Make certain that the switch setting matches
the AC line voltage.
1. Interconnect the adapter to the NiCd battery pack.
2. Plug the battery charger into an AC outlet.
3. Do not allow the battery to charge for greater than
15 hours. The useful life and battery performance
will be reduced if you exceed the recommended
charge period:
Voltage selection switch
for general
market only
NiCd battery pack
NOTE
Recharging should be done within an ambient
temperature between 5°C ~ 40°C (41°F ~ 104°F).
Recharging performed out of this range may not
fully charge the battery.
HEMANGANESE or ALKALINE ria ab 6)
Load 6 xX R6 (AA) manganese or
alkaline batteries in series in the
optional battery case(BT-6). (Be
sure to observe the polarities.) //;
We recommend the use of high (==
perfomance manganese batteries.
Press down on the hook in the
middle of the battery case top
to open.
CAUTION
Do not install NiCd batteries and attempt to charge
them with the supplied charger. There is no battery
protection circuit in the battery holder.
MBINSTALLING THE BATTERY PACK
Align the grooves in the bat- Release button
tery pack with the transceiver I | [JA
and slide the pack to the right S&S
until it locks in place. Le
To remove the battery pack S>
push up on the RELEASE button me
and slide the pack to the left.

MBBATTERY VOLTAGE LEVEL METER
The meter indicates the relative battery voltage during
transmit.
Recharge or replace the
reaches the low indicator.
NiCd Battery pack
batteries when the level
Model V | mAh Fully charged Fully discharged
PB-5 200
PB-6
72
PB-9 ipa
PB-7 1100
PB-8 | 12 | 600 =
=
=
=
=
Manganese or Alkaline batteries (Approximate battery condition)
New batteries Need to change batteries
MOPERATING TIME [Hour]
144MHz
430MHz
@ 1 minute Transmission, 3 minutes Reception, AF
output 0.2W/8Q.
® Battery Saver function on. Simplex operation mode.
CAUTION
When the battery is overdischarged, the indicator
begins flashing and the POWER switch may not func-
tion. Immediately charge or replace the battery.
We recommend use of the NiCd battery pack for long
transmission or extended operation.
Manganese batteries ( except
batteries ) is available for Low position.
Alkaline manganese

4. OPERATION
4-1. OPERATING
CONTROLS
@Antenna connector
Connect the antenna that is supplied to this connector.
Twist to lock.
@DC IN terminal
This terminal is used for an external power supply. Input
voltage is 13.8 VDC nominal. The center is the + side
and the sleeve is the — side.
NOTE
You should turn the power switch OFF when connect-
ing a power source to this terminal. Pay close atten-
tion to polarity.
Use the KENWOOD PG-2W or PG-3F optional cable for
connection.
@MIC jack
This jack is used for connection of an_ external
microphone. The use of an electret type microphone is
recommended. Input impedance is 2kQ and the DC
voltage on this terminal is Approx. 4 V (MAX 3.5 mA).
The use of a dynamic microphone is not recommended.
Speaker Hl iE
SP
Ground
Ext. S|
Ext. MIC
: Pals uF
3« Always ensure that this connection is made.
@SP jack
This jack is used to connect an stereophonic external
speaker or earphone. The recommended impedance is
80.
If you hold and press the DUAL key while you turn the
POWER switch to on, the radio will exchange 1 and 2
below.
1. Audio signals from both bands will be heard only
from the external speaker (initial setting).
2. Audio from TX band will be heard from the internal
speaker, and audio from RX band will be heard from
the external speaker.
(lf you hold and press the BAND key while you turn
the POWER switch to on, the band will exchange
each other.)

®VOL controls
Rotating the control further clockwise will increase the
volume.
@©SAQL(Squelch) controls
These controls are used to select the desired Squelch
threshold level.
@Tuning control
This control is used to select the desired
transmitter / receiver frequency, MHz step, Memory
Channel, Frequency Step, Tone
Direction, etc.
Frequency, Scan
@POWER switch
Press for longer than 0.1 second to turn the transceiver
ON or OFF.
@MONI switch
Pressing this switch will disable the squelch function as
long as the switch is held depressed.
When operating in the CTCSS (Tone Squelch) mode you
can use this switch to determine if the frequency is in
use before transmitting. Pressing this switch will disable
the CTCSS function as long as the switch is held
depressed.
After you press and hold this switch while you turn on
the POWER switch, rotating the Tuning control will
select monitoring band.
-1. Both main and sub band can be monitored.
-2. Main band only can be monitored.
-3. Sub band only can be monitored.
@PTT (Push To Talk) switch
Press this switch whenever you wish to transmit.

@LAMP key
This switch is used to control the night lamp on the LCD
display. The lamp will turn itself OFF automatically 5
seconds after the last key operation.
Pressing the key within 10 seconds of pressing the F key
will light the lamp on the LCD display parmanently until
pressing this key again.
©RELEASE button
Press this button upward to release the battery pack.
Speaker/
Microphone
@UXU / VM SCAN key
This switch is used to select dual UHF watch operation.
In dual watch operation the V indicator will light on the
previous VHF band display.
Pressing the key within 10 seconds of pressing the F key
will initiate VFO and last memory channel scan.
@CALL/C SCAN key
Press this key to activate the call channel function.
Pressing the key within 10 seconds of pressing the F key
will initiate CALL CHANNEL SCAN .
( Mode key )
When this key is held down and the power switched on,
it becomes the Mode key for switching between the
VFO mode, Memory channel mode, and Call channel
mode.
@BAND / A.B.C.(Automatic Band Change) key
This key is used to exchange the contents of the main
band and sub band.
Pressing the key within 10 seconds of pressing the F key
will transfer the contents of the sub band to the main
band whenever a signal is received at the sub band
antenna, which is strong enough to open the squelch.
The contents of the main band are transfered to the sub
band at the same time.(A.B.C. function)