Kenwood TH-27A User manual

7\
m
Z
o
o
o
144 MHz FM TRANSCEIVER
TH-27A/27E
430/440MHz FM TRANSCEI VER
TH-47A/47E
INSTRUCTION MANUAL
KENWOOD CORPORATION
© PRINTED IN JAPAN 862-0046-00(A.T)(K.X.T)
91 / 12111098765432190/1211109876

CAUTION
THE MEMORY IS MAINTAINED BY A RECHARGEABLE
SECONDARY LITHIUM BATTERY. WITH THE BATTERY
CASE REMOVED, THE MEMORY IS RESET TO ITS INI-
TIAL STATE AFTER ABOUT 20 DAYS. A FULLY DIS-
CHARGED BATTERY WILL REQUIRE APPROX . 10
HOURS TO REACH FULL CHARGE AFTER INSTALLING
A NiCd BATTERY PACK OR AN EXTERNAL POWER
SUPPLY.
FCCWARNING
Press the powe r
switch for l on ger
than 0.3 second
to turn the tran s-
ceiver on or off .
This
equipment may generate or use radio frequency
energy . Changes or modifications to this equipment
may cause harmful interference unless the mod ifica-
tions are expressly approved in the instruction man-
ual. The user could lose
the authority to operate this
equipment if an unauthorized change or modification
is made.
2
KE NWOOD
&, c.cn ""
CD CD CD C::!:) .
~ . IICI·' '.00·1 "[ 000 I~ S
G:) c::I:> CD G:) •
• " . VO " . , """ .
c:::L> <::!:) CD aID c
.U L o~, SIlO . .. 'c '.
0IJ> CL> Gill m:!E> g
. .
F lO HA ~ SC£'VH '"-27~
1U ", ,.1

CONTENTS
1. BEFORE OPERATION .............................................. 4
2. SPECIFICATIONS and ACCESSORIES ................. 4
3. BATTERY PACK ................ ........................... 6
4. OPERATION .............................................................. 8
4-1 OPERATING CONTROLS ............................. 8
4-2
RECEIVER OPERATION ................................ 15
Receiver Operation
Frequency Selection
Step
Size selection
Programmable VFO Tuning Limits
4-3 TRANSMITTER OPERATION .......
18
4-4 MEMORy....... ...................................... 19
Microprocessor Memory Back-up
Microprocessor Initialization
Memory Channel
Memory Contents
Memory Entry
Memory Channel Re call
Memory Shift
4-5 SCAN ................................... 23
Scan Options
Hold/Resume Programming
Band Scan
Programmable
Ba nd Scan
MHz Scan
Memory Channel Scan
VFO/Memory Channel Scan
CALL Scan
Memory Channel Lockout
Pr ior ity Alert Function
4-6 REPEATER OPERATION ...............................
28
Transmitter Offset
Reverse Function
Tone and CTCSS Operation
Autopatch Operations
4-7 DTMF MEMORy ......................................... 31
4-8 DTSS ................................................................ 33
DTSS Code
D
TSS Code Selection
Us ing the DTSS function
Us ing DTSS with a Repeater
4-9 PAGING .
... ............................................... ... .... 35
Paging Code Memories
Setting the
Pag ing Codes
Paging Transmission (Calling)
Paging Reception (Wait)
Code Lockout
4 -10 TONE ALERT SYSTEM ................................. 41
4-11 BATTERY SAVER ........................................... 42
4 -1 2 AUTOMATIC POWER OFF .......................... 42
4 -13 CLOCK ............................................................ 43
5. 8LOCK DIAGRAM and SCHEMATIC DIAGRAM
..... ................................................... another sheet
6. MAINTENANCE .......................................................
46
In Case of Difficulty
7. OPTIONAL ACCESSORIES .................................... 48
3

1. BEFORE OPERATION
Thank you for pur ch as ing th is 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 mi ght cause the rear of this transceiver
to get warm . Do not place the transceiver where the
heat sink ( rear panel) mi ght come in contact with
pla st ic or vinyl surfaces.
Use of an external antenna for fixed station is
recommended.
SAVE THIS INSTRUCTION MANUAL.
Th is Instruction Manual covers the following mode ls:
TH-27A: 144MHz FM transceiver
TH-27E:
144MHz FM trans ceiv er
(U.K.and European version)
TH-47
A: 440MHz FM transceiver
( U.S.A. and Canadian version)
TH-47A: 430MHz FM transceiver (Other market)
TH-
47E : 430MHz FM transceiver
(U.K.and European version)
The following explicit definitions apply in this manual:
NOTE If d isr egarded. inconvenience only. no risk of equi pment
damage or personal i njury_
CAUTION Equ ipment damage may occur, but not personal inju ry.
4
2. S PECIFICATIONS and
ACCESSORIES
2-1. SPECIFICATIONS
GENERAL TH-27A1E TH·47AJE
U.S.A. VerSion 144 to 148 4 3B to 450
FREQUENCY U.K.and Europe
144t0146 430 to 440
RANGE (MHz)
Other market
430 to 440
144t0148
or 438 to 450
MODE F3E (FM)
ANTENNA IM PEDANCE 50 Q
OPERATING TEMPERATURE 20°C -+ 60°C ( 4
°F-14 0 °F)
POWER I DC IN(nom,nal) 7.2 v-16 VDC (13.B VDC)
REQUIREMENTS I BATTERY PACK 6.3 V -
16 VDC (7 .2VDC)
CURRENT DRAIN
13.8VDC (Ext. Power Supply) H
Approx. 1.SA Approx. 1.SA
7 2VDC (Battery) H
Approx.1A Approx.1A
Transmit mode L
Approx O.SA
Approx.O.SA
Transmit mode EL
Approx. 0,' 2A App
r
ox.O.1SA
Receive mode With no signal
Approx.60mA Approx.6SmA
Battery Save mode
Approx 17mA
Approx. 17mA
GROUND Negative
DIMEN510N(W x H x D) 49.5x 124.7x38.0mm
DIMENSION( Projection Included) 57x138.7x39.7mm
WEIGHT
360
9
MICROPHONE INPEDANCE
2kQ
TRANSMITTER
H (13 8VDC) more than SW
OUTPUT H (7.2VDC) Approx. 2.5W TApprox. 1.SW
POWER L Approx.O.SW
EL Approx.20mW

TH·27A1E TH·47A1E
MODULATION
Reactance
MAXIMUM FREQUENCY DEVIATION + 5kHz
SPURIOUS RADIATION less than 60dB
RECEIVER
double converSIon super-
CIRCUITRY heterodyne
INTERMEDIATE FREQUENCY 1 st IF
45.05 MHz S8.525 MHz
INTERMEDIATE FREQUENCY 2 nd IF 455 kHz
less than
less than
SENSITIVITY (1 2dB SINAD) - 1
6dB~ - 1 SdB~
(0.l6uV)
(0.18u V)
SQUELCH SENSITIVITY less than 20dBu(0.1
~V)
SELECTIVITY - 6dB morethan 12kHz
SELECTIVITY -
60dB less than 28kHz
AUDIO OUTPUT POWER more than 200 mW
(10% distortion)
(across aQ load)
NOTES:
1. Circuits and rating are subject to change without notice. due to
development in technology. . . .
2. Recommended duty cycle: 1 minute Transmission. 3 minutes
Reception.
2-2. ACCESSORIES
Unpack your transceiver carefully and confirm that the
accessories listed
below are included in the box.
Antenna (TH-27
N27E) T90-0420·x X 1
(TH-47N47E) T90-0421-x x 1
Belt Hook .................................... J29-0459-04 ......... 1
Hand Strap ..................................
J69-0312-04 ..... .. .. 1
Rubber Cap ..................................
B09·0324-03 ........ 1
NiCd Battery Pack(PB-13) ........
W09-0563-05 ....... 1
Battery Charger(BC·1
4) .... .................................. 1
for U.S.A. and Canadian version
(1 20V)
W09-0565-x X
for European version
(220V) W09-0569-X X
for U.K.version
(240V) W09-0568- x X
for Oceania.version
(240V) W09-0567-x X
for other market (120/240V) W09·0566 -x X
Instruction Manual B62·0046-XX 1 copy
Warranty Card .................................................................. 1
(U.S.A
.. Canada.and European version only)
After unpacking
Shipping container:
Save the boxes and
packing in the event
your unit needs
to be
transported for re-
mote operation. main-
tenance. or service. !;P ~
Hand Strap
t
~~
Belt Hook 5

3. BATTERY PACK
• Ni-Cd BATTERY PACK (PB-13)
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 greater than 2 months it should
be recharged before use.
• RECHARGING
Insert the charge plug from the charger (BC-' 4) i nto the
receptacle on the top of the transceiver. Then plug the
charger
into the AC line. Do not allow the battery to
charge for greater than' 5 hours. The use for life and
battery performance will be reduced
if you exceed the
recommended charge period.
(Illustrations show the U.S.A. version.)
6
NOTE
Recharging should be done within an ambient
temperature between SoC - 40 °C (41 °F - 104 ° F).
Reharging performed out of this range may not fully
charge the battery.
• INSTALLING THE BATTERY PACK
Insert the battery pack i nto the transceiver unt il it locks
in place.
To remove the battery pack slide the Release button and
pull the pack.
RELEASE button

• BATTERY VOLTAGE LEVEL METER
The meter indicates the relative battery voltage during
transmit.
Recharge
or replace the batteries when the level reaches
the
low indicator. NiCd Battery pack
Fully charged Fully discharged
Approximate battery condition
• OPERATING TIME
H M L EL
PB·13 2 2.5 4 15
TH·27A
TH·27E
Alkaline B.
--0.8 5.5
Manganese B. 2 2 3 6.5
PB·13 2 2.5 4 13.5
TH·47A
TH·47E
Alkaline B. - - 0.8 4.5
Manganese B. 2 2.5 3 6
• 1 minute transmission. 3 minutes reception, AF output
0.2 W/8 11.
• Battery saver function on.
CAUTION
The display indicator flashes and the POWER switch
will not work when the battery starts to go flat.
When this happens, recharge or replace the battery.
We recommend use of the NiCd battery pack for long
transmission or extended operation.
Manganese
ba tteries (except Alkaline manganese batter-
ies) is available for Low or EL position.
• MANGANESE or ALKALINE BATTERIES
Load 6 x R6 (AA) manganese or alkaline batteries in
series
in the optional battery case(BT·8). (Be sure to
observe the polarities.)
(We recommend use of high perfomance manganese
batteries.)
Be sure the pack and transceiver are locked together.
Manganese
or Alkaline batteries
New batteries
r::::: -_-:::. " -
-
~
-
•
Need to change batteries
Approximate battery condition
7

4. OPERATION
4·1. OPERATING CONTROLS
<D 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 1 3.a 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 micro-
phone. The use of an electret type microphone is
recommended. Input impedance is 2kn and the DC
voltage on this terminal is Approx. 4 V (MAX 3.5 mAl.
a
NOTE
The use of a dynamic microphone is not recommend-
ed.
Speaker
..
SP , V D
"' 0#12 .5
Ground Plug ;;
w
...
,
~
5V
,
~
5 V ! V ] .~
MIC
•
MIC
1\
>-
u
>-
:>
PTT ,
10 ~F
PTT
~
w
@ SP jack
This jack
is used to connect an external speaker or
earphone. The recommended impedance
is an.
@ ON AIR indicator
On whenever the transceiver is in the transmit mode.
@ VOL control
Rotating the control further clockwise will increase the
volume.
(J) SQL(Squelch) control
This control
is used to select the desired Squelch
threshold level.
® Tuning control
This control
is used to select the desired transmitter
/receiver frequency, M
Hz step, Memory Channel. Fre-
quency Step, Tone Frequency, Scan Direction, etc.

ill MONI switch
m rnrnco ·
mmrnrn .
CDcTICDam<
~rn~;nB .
,. ,...,,,.,,,.,,,
,.,../
When operating in the CTCSS (Tone Squelch) mode you
can use this key to determine
if the frequency is in use
before transmitting. Pressing this key will disable the
CTCSS function as long as the key is held depressed.
~ PTT (Push To Talk) switch
Press this switch whenever you wish to transmit.
@ POWER switch .
Press for longer than 0.3 second to turn the transceiver
ON or OFF.
@ 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 Fkey
will light the lamp on the LCD display until pressing this
key again.
@ TONEITONE SEL key
Except European version; This key
is used to activate the
subaudible tone encoder.
European version; This key
is used to transmit the
1750Hz repeater access tone whenever this key is
depressed.
U.S.A .. Canada. or with optional TSU-7; Pressing the key
within 10 seconds of pressing the F key will switch to
the tone frequency selection mode. The Tuning control
can then
be used to select the desired tone frequency.
@ CALVC. SCAN key
Press this key to activate the call channel function.
Pressing the key within 10 seconds of pressing the Fkey
will start or stop CALL channel scanning.
(/) DTSS/PAG key
This key
is used to activate the DTSS function.
Pressing the key within 10 seconds of pressing the Fkey
will turn the PAGING function on or off.
@ LOW/CLOCK key
This key
is used to switch the transmit output power;
M
edi um(M)/Low(L)/Econom ic· Low(E L)/H igh (no
indicator).
9

Pressing the key within 10 seconds of pressing the Fkey
will switch alternately between the frequency displayand
CLOCK display.
~ " ~ CTCSS T" T 'J ,
b ffi Ci!J mA
PROG-l PROG - 2 MEMO TX 5
,F~~
<D l/AL key
This key
is used to turn memory channell on or off.
Pressing the key
within 10 seconds of pressing the Fkey
will check Memory Channel 1 at approx. 5 second
intervals.
If the channel is busy, a beep will sound
(ALERT).
® 2/CTCSS key
This key is used
to turn memory channel 2 on or off.
Pressing the key
within 10 seconds of pressing the Fkey
will turn the CTCSS function on or off.
@ 3/T.AL T key
This key
is used to turn memory channel 3 on or off.
Pressing the key
within 10 seconds of pressing the Fkey
will turn the TONE ALERT function on or off.
10
@ F key
This key
is used to activate control of the functions. The
"F" indicator will turn ON or flash for approximately 10
seconds. You must press the desired function key before
the indicator turns off.
® 4/ PROG-1 key
This key
is used to turn memory channel 4 on or off.
Pressing the key
within 10 seconds of pressing the Fkey
will select the programmable scan 1 MODE.
@ 5/ PROG-2 key
This key
is used to turn memory channel 5 on or off.
Pressing the key within
10 seconds of pressing the Fkey
will select the programmable scan 2 MODE.
(f) 6/ MEMO key
This key
is used to turn memory channel 6 on or off.
Pressing the key
within 10 seconds of pressing the F key
will select the memory scan MODE.
@ M/ TX.S key
This key
is used to store the displayed data into memory.
Pressing the key within
10 seconds of pressing the Fkey
will turn the TX.STOP function on Or off.