Kenwood TH-75A User manual

GOOMNS>)I
144/440MHz FM DUAL BANDER
TH-/75A
144/430MHz FM DUAL BANDER
TH-75A
144/430MHz FM DUAL BANDER
TH-75E
INSTRUCTION MANUAL
KENWOOD CORPORATION
@©PRINTED IN JAPAN B50-8275-00(K, M, X, W, T, P)(T)
90/12 1110987654321 89/12111098765

CONTENTS
1. BEFORE OPERATION
2. SPECIFICATIONS and ACCESSORIES ..
3. BATTERY PACK
4. OPERATION
OPERATING CONTROLS ...
RECEIVER OPERATION
Reception, Frequency selection,
Frequency step selection, Programable VFO, A.B.C.
TRANSMITTER OPERATION . F015:
MEMORY 216
-oO PWNH
Microprocessor initialization, Memory channel,
Memory contents, Memory entry,
Memory recall, Memory shift
SCAN
Scan operations, Hold/resu g!
Band scan, Programmable band scan,
Memory channel scan, Double memory scan,
Memory channel lockout, Priority alert
REPEATER OPERATION..
Transmitter offset, Reve
Tone and CTCSS operation, ea
TONE ALERT SYSTEM.
BATTERY SAVER.........
AUTOMATIC POWER OFF.
FAST SQUELCH
5. BLOCK DIAGRAM and
SCHEMATIC DIAGRAM ............. another sheet
6. MAINTENANCE ......o..... ee eeeeceeceseeeseeeteeeseeenaee 29
In Case of Difficulty
7. OPTIONAL ACCESSORIES....................::::cccee 31
CTCSS unit TSU-6
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
transmittion
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.
Use of an external antenna for fixed station is recommended.
SAVE THIS INSTRUCTION MANUAL.
This
Instruction
Manual
covers
the
following
models.
TH-75A
:
144/440
MHz
FM
DUAL
BANDER
with
CTCSS unit.
(U.S.A. and Canadian version)
TH-75A : 144/430 MHz FM DUAL BANDER.
(Other market)
TH-75E : 144/430 MHz FM DUAL BANDER.
(U.K. and European version)
The following explicit definitions apply in this manual:
NOTE : If disregarded, inconvenience only, no risk of
equipment damage or personal injury.
CAUTION:
Equipment
damage
may
occur,
but
not
per-
sonal
injury.

2. SPECIFICATIONS
2-1. SPECIFICATIONS
and ACCESSORIES
2m Band 70 cm Band
TH-76A U.S.A. version 144 to 148 438 to 450
Bae eeR TH-75E European and U.K. version 144 to 146 430 to 440
TH-75A Others 144 to 148 430 to 440
MODE F3E (FM)
MEMORY CHANNELS 10+1 I 10+1
FREQUENCY STEP (kHz) 5, 10, 18, 20, 12.5, 26
ANTENNA IMPEDANCE (0) 50
POWER REQUIREMENT 6.3~ 16 (7.2 VDC nominal)
13.8V Approx. 1.4 A Approx. 1.5 A
i hg HI | 9 V (with BT-6) Approx. 1.2 A Approx. 1.3 A
S| cup. | mode 7.2 V (with PB-5/6/7/9) ‘Approx. 1A Approx. 1.1A
Ser LO transmit mode Approx. 0.6 A Approx. 0.6 A
& DRAIN | Single | RECEIVE mode with no signal_| Approx. 45 mA Approx. 50 mA
band | BATTERY SAVER mode Approx. 12 mA Approx. 13 mA
Dual | RECEIVE mode with no signal Approx. 83 mA
band | BATTERY SAVER mode ‘Approx. 20 mA
AUTOMATIC POWER OFF mode Approx. 3 mA
GROUND Negative
DIMENSIONS _ | Projections not included (mm) 58x 179 29.5 (2.3x 7X 1.2 inch)
(WxHxD) Projections included (mm) 74x 193 x40 (2.9x7.6x 1.6 inch)
WEIGHT (g)___ With NiCd Battery and Antenna | 510 (1.1 Ibs.)
OPERATING TEMPERATURE =20°C~ +50°C (—4°F~122°F)
MICROPHONE IMPEDANCE 2ko
m 13.8V More than 5 W
B] oureur Hi [9 V (with BT-6) ‘Approx. 3 W Approx. 2.5 W
| POWER 7.2 V (with PB-5/6/7/9) Approx. 1.5 W. Approx. 1.5 W.
FA to ‘Approx. 0.5 W
< MODULATION REACTANCE
f | MAXIMUM FREQUENCY DEVIATION (kHz) +5
SPURIOUS RADIATION HI/LO Less than — 60 dB/— 50 dB
CIRCUITRY [DOUBLE CONVERSION SUPERHETERODYNE
INTERMEDIATE | 1st IF (MHz) 16.9 59.525
| FREQUENCY _[ 2nd IF (kHz) 455
5 | SENSITIVITY 12 dB SINAD | Less than 0.16,V | Less than 0.18:V
| SQUELCH SENSITIVITY Less than 0.1 .V
@ -6 dB More than 12 kHz
SELECTIVITY: » anna Less than 28 kHz
AUDIO OUTPUT POWER
(across 8 @ load 10% distortion)
More than 400 mW/at 9 V
NOTES:
1. Circuit and ratings are subject to change without
notice due to advancement in technology.
2. Recommended duty cycle: 1 minute Transmis-
sion, 3 minutes Reception
2-2. ACCESSORIES
Unpack your new transceiver carefully, and exa-
mine it for visible damage. If the equipment has
been damaged in shipment, notify the transporta-
tion company immediately.
Save the boxes and packing material for future
shipping.
The following accessories should have been includ-
ed in the box with the transceiver.
Antenna.... T90-0388-05...1 ea.
Belt Hook J29-0424-04...1 ea.
Hand strap. J69-0312-04...1 ea.
W09-0507-05..1 ea.
NiCd Battery pack (PB-6).
Battery charger
for U.S.A. version (120V)
adesincavesaseuck W09-0382-15
for European version (220V)
inidessauaaee see WO09-0388-05
for U.K. version (240V)....WO9-0387-05
for Oceania version (240V)
WO09-0386-05
WO09-0385-05
for other market (120V).
Instruction Manual ..
Warranty Card....
(U.S.A., Canada, and European version)
B50-8275-XX .1 copy
1 ea.

3. BATTERY PACK
3-1.
NiCd
BATTERY
PACK
(PB-6)
This battery pack has not been charged at the factory in
order to provide you with the greatest number of charge/dis-
charge cycles. You must charge the battery before use. The
battery pack will require several charge/discharge cycles be-
fore 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.
3-2. RECHARGING Msxe”
1. Slide the adapter onto the
NiCd battery pack.
2. Plug the supplied 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.
NOTE:
Recharging should be per-
formed within an ambient
temperature range of between
5°C~40°C (41°F ~
104°F).
Recharging the battery out-
side of this range may not al-
low the battery to reach full
charge.
to AC outlet
3-3.
MANGANESE
or
ALKALINE
BAT-
TERIES
(Optional
Battery
Case
BT-6)
Install 6 x R6 (AA) manganese
or alkaline batteries in the bat- Press down on the hook in the
tery
holder.
Pay
close
atten-
‘Middle
of
the
battery
case
top
* ty to open.
tion the battery polarities
marked in the holder. We Hook
recommend the use of high |
performance manganese bat-
teries for the greatest operat-
ing time.
NOTE: ——________
Do not install NiCd batteries
and attempt to charge them
with the supplied charger.
There is no battery protection
circuit in the battery holder.
3-4.
INSTALLING
THE
BATTERY
PACK
Align the grooves in the bat- Release button
tery pack with the transceiver >
and slide the pack to the right
until it locks in place.
To remove the battery pack
push up on the release button
and slide the pack to the left.

3-5. BATTERY VOLTAGE LEVEL METER
The S meter indicates the rela-
tive battery voltage during Manganese or Alkaline
transmit. a
b
Recharge or replace the bat- mitexies
teries when the level reaches New myeeg te
batteries replace
the low indicator.
7
|
Approximate battery condition
NiCd Battery pack
model mAh Vv Fully charged Fully discharged
ageret "ag Ae
PB-6 600
peg | 600 | 72 ”
PB-7 1100 Zz
=f
F
pp-8 | 600 | 12 =A
z
3-6. OPERATING TIME
TH-75
series
Transmitting.
Receiving
..
ti
AF
OUTPUT...
Nica
* Battery voltage is mea:
600
transmission (Hi).
battery 1
2v
12 mAh (PB-8)
10 | NiCd battery
7.2V 200 mAh
(PB-5)
NiCd battery 7.2 V 600 mAh (PB-6)
NiCd battery 7.2 V
1100 mAh (PB-7)
Lower limit voltage range for transmission
6
4 | Mengansese — Manganese battery ‘AA Alkaline manganese
battery (BT-6) _(Low-Power)(BT-6) battery (BT-6)
2
° ens
60 120 180 240 300 (minutes)
We recommend use of the NiCd battery pack for long trans-
mission or extended operation.
Manganese battery (except Alkaline manganese battery) is
suitable only for LOW power transmission.

4. OPERATION
4-1.
OPERATING
CONTROLS
© Antenna connector
Connect
the
antenna
that
is
supplied
to
this
jack.
Twist
to lock.
@ HI-LO switch
This
switch
is
used
to
select
the
transmit
output
power.
@ MIC jack
This
jack
is
used
for
connection
of
an
external
micro-
phone.
The
use
of
an
electret
type
microphone
is
recom-
mended.
Input
impedance
is
2
kQ
and
the
DC
voltage
on
this
ter-
minal is approximately 4 V (max. 3.5 mA).
NOTE:
The
use
of
a
dynamic
microphone
is
not
recommended.
Speaker
sP
Ground
th
5V
MIC
MIC
PTT
PET:
@ Speaker jack
This
jack
is
used
to
connect
an
external
speaker
or
ear-
phone.
The
recommended
impedance
is
8
Q.
© VHF SOL control
This
control
is
used
to
select
the
desired
SOL
threshold
level of the VHF frequency band.
© VOL control/Power switch
The
volume
control
and
power
switch
are
combined.
Rotating
the
control
clockwise
will
turn
ON
the
tran-
sceiver.
Advancing
the
control
further
clockwise
will
in-
crease
the
volume
of
both
bands.
The
BAL
control
proportions
the
volume
among
the
two
bands.
@ UHF SOL control
This
control
is
used
to
select
the
desired
SQL
threshold
level of the UHF frequency band.
BALANCE control
This
control
proportions
the
total
audio
volume
among
the two bands.
MAIN
position
Audio
only
from
the
MAIN
band
Center
position
Equal
audio
from
both
bands
SUB
position
Audio
only
from
the
SUB
band
© Tuning control
This
control
is
used
to
select
the
desired
transmit-
ter/receiver
frequency,
memory
channel,
frequency
step,
tone
frequency,
and
scan
direction.

@ F key
This key is used to activate control of the functions print-
ed above the various front panel controls. The ‘’F’’ indi-
cator will turn ON for approximately 10 seconds. You
must press the desired 2nd function key before the indi-
cator turns off.
@ TONE/T.SEL key
This key is used to activate the subaudible tone encorder.
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.
@ SHIFT/REV key
This key is used to select the desired transmitter offset
direction. Pressing the key will cause the radio to shift
from one offset direction to the other, i.e. + to — to sim-
plex where no indicator showes. [— to — — for Europe-
an version (UHF band)].
Pressing the key within 10 seconds of pressing the F key
will reverse the transmit/receive frequencise during
repeater operations. If you have selected simplex this key
will not function.
@ UP/DWN (Sub tuning) keys
These keys are used to select the desired SUB band
receive frequency or Memory channel.
Pressing the UP key within 10 seconds of pressing the
M key will enter the upper limit for the programmable VFO
tuning limit function. Pressing the DWN key within 10
seconds of pressing the M key will enter the lower limit
for the programmable VFO tuning limit function.
© M/TX.S key
This key and numeric key are used to store the displayed
data into memory.
Pressing the key within 10 seconds of pressing the F key
will turn the TX.STOP function ON and OFF.
ENT/K.LOCK key
In the VFO mode this key is used to switch to the direct
keyboard frequency entry mode.
In the MR or CALL channel mode this key is used to trans-
fer the contents of the channel to the VFO mode (Memory
shift).
Pressing the key within 10 seconds of pressing the F key
will deactivate all functions except the PTT, MONI,
LAMP, F then LOCK keys.
@ SCAN/DMS key
This key is used to start or stop scanning.
Pressing the key within 10 seconds of pressing the F key
will start or stop Double Memory Scanning.
CALL key
This key is used to activate the Call channel function.
@ MICROPHONE

@
BAND/A.B.C.
(Automatic
Band
Change)
key
This
key
is
used
to
exchange
the
contents
of
the
MAIN
and
SUB
band.
When
this
key
is
pressed
within
10
seconds
of
pressing
the
F
key,
the
contents
of
the
SUB
band
will
be
trans-
fered
to
the
MAIN
band
whenever
a
signal
is
received
at
the
SUB
band,
which
is
strong
enough
to
open
the
squelch.
The
contents
of
the
MAIN
band
are
transfered
to
the
SUB
band
at
the
same
time.
@ MHz/STEP key
This
key
is
used
to
tell
the
microprocessor
that
you
wish
to
increase
or
decrease
the
operating
frequency
in
1
MHz
increments.
During
VFO
operation
pressing
the
key
within
10
seconds
of
pressing
the
F
key
will
switch
to
the
frequency
step
selection
mode.
@ DUAL/DUP key
This
key
is
used
to
turn
the
SUB
band
ON
or
OFF.
Pressing
the
key
within
10
seconds
of
pressing
the
F
key
will
cause
the
duplex
function
to
activate.
@ 1/AL key
This
key
is
used
to
turn
memory
channel
1
ON
or
OFF.
Pressing
the
key
within
10
seconds
of
pressing
the
ENT
key will enter number 1.
Pressing
the
key
within
10
seconds
of
pressing
the
F
key
will
check
Memory
Channel
1
at
approx.
5
second
inter-
vals.
If
the
channel
is
busy,
a
beep
will
sound.
© 2/T.ALT key
This
key
is
used
to
turn
memory
channel
2
ON
or
OFF.
Pressing
the
key
within
10
seconds
of
pressing
the
ENT
key will enter number 2.
Pressing
the
key
within
10
seconds
of
pressing
the
F
key
will
turn
the
Tone
Alert
function
ON
or
OFF.
3/CTCSS key
This
key
is
used
to
turn
memory
channel
3
ON
or
OFF.
Pressing
the
key
within
10
seconds
of
pressing
the
ENT
key will enter number 3.
Pressing
the
key
within
10
seconds
of
pressing
the
F
key
will
turn
the
CTCSS
function
ON
or
OFF.
@ 4/TO/CO keys
This
key
is
used
to
turn
memory
channel
4
ON
or
OFF.
Pressing
the
key
within
10
seconds
of
pressing
the
ENT
key will enter number 4.
Pressing
the
key
within
10
seconds
of
pressing
the
F
key
will
toggle
the
hold/resume
mode
alternately
from
Time
Operated
scan
to
Carrier
Operated
scan.

5/BEEP key
This key is used to turn memory channel 5 ON or OFF.
Pressing the key within 10 seconds of pressing the ENT
key will enter number 5.
Pressing the key within 10 seconds of pressing the F key
will turn the audio confirmation beep ON or OFF.
© 6/CT V/U key
This key is used to turn memory channel 6 ON or OFF.
Pressing the key within 10 seconds of pressing the ENT
key will enter number 6.
Pressing the key within 10 seconds of pressing the F key
will switch the CTCSS function alternately between the
VHF band and UHF band.
TISAVE key
This key is used to turn memory channel 7 ON or OFF.
Pressing the key within 10 seconds of pressing the ENT
key will enter number 7.
Pressing the key within 10 seconds of pressing the F key
will turn the Battery Saver function ON or OFF.
@ 8/APO key
This key is used to turn memory channel 8 ON or OFF.
Pressing the key within 10 seconds of pressing the ENT
key will enter number 8.
Pressing the key within 10 seconds of pressing the F key
will turn the Automatic Power OFF function ON or OFF.
@ 9/LOCK key
This key is used to turn memory channel 9 ON or OFF.
Pressing the key within 10 seconds of pressing the ENT
key will enter number 9.
Pressing the key within 10 seconds of pressing the F key
will deactivate the Tuning control and all functions ex-
cept the PTT, MONI, LAMP, and F then K.LOCK keys.
@ O/L.OUT key
This key is used to turn memory channel O ON or OFF.
Pressing the key within 10 seconds of pressing the ENT
key will enter number 0.
Pressing the key within 10 seconds of pressing the F key
will turn the memory channel lock out function ON or
OFF.
MONITOR switch
When operating in the CTCSS mode you
can use this key to determine if the fre-
quency is in use before transmitting.
Pressing the key will disable the CTCSS
function as long as the key is held
® depressed.
@ Lamp switch
This switch is used to control the night
lamp on the display. The lamp will turn it-
self off automatically 5 seconds after the
last key operation.
PTT switch
Press this switch whenever you wish to
transmit.
@ Release button
Press this button up to release the battery
pack.

DC IN terminal
This terminal is used for an external pow-
er supply. Input voltage is 13.8 VDC
nominal. The center is the + side and the
sleeve is — side.
CAUTION:
You should turn the power switch OFF
when connecting this terminal. Pay close
attention to the polarity.
As a precaution, do not remove the bat-
tery pack when an external power supply
is used.
Use the KENWOOD PG-2V or PG-3E op-
tional cable for the connection.
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Displays
the
selected
transmitter
offset
-+
direction.
@R
ON
when
the
Reverse
function
is
active.
@TX.STOP
ON
when
the
TX.STOP
function
is
active.
@K.LOCK
—_
ON
when
the
K.LOCK
function
is
active.
LOCK
ON
when
the
LOCK
function
is
active.
© RE
ON during transmit.
ON
when
the
Tone
Alert
System
is
active.
The
indicator
will
flash
when
a
signal
is
received.
This
level
meter
indicates
the
relative
receive
input
strength or
battery
voltage
level
during
transmit.”
c ON when the SUB band frequency dis-
plays CALL channel.
@
M
ON
when
the
SUB
band
frequency
dis-
plays a memory channel.
CTCSS
ON
when
the
CTCSS
function
is
active.
O Ve
-U
Displays the selected CTCSS band.
®
Displays
the
operating
frequency
to
the
886.888.
nearest
kHz,
the
frequency
step
size,
or
the
tone
frequency
of
the
MAIN
band.
ON
when
the
Fast
Squelch
function
is
active.
Flashes when Scanning.
®
ON
when
the
Tone
function
is
active.
(©)
ON
when
the
Priority
Alert
system
is
active.
®
Co
ON
when
Carrier
Operated
scan
is
selected.
ON during duplex operations.
(0)
ON
when
the
A.B.C.
(Automatic
Band
Change)
function
is
active.
M
ON
when
the
MAIN
band
frequency
dis-
plays
a
memory
channel.