Kenwood TS-140S User manual

GOO/ANA
HF TRANSCEIVER
TS-140S
MULTI BANDER
TS-680S
INSTRUCTION MANUAL
KENWOOD CORPORATION
©PRINTED IN JAPAN B50-8199-50(K, M, T, W)(T)
92/12 1110987654321 9121109876543

Thank you for purchasing this new transceiver.
IMPORTANT:
Please read this Instruction Manual carefully before
placing the unit in service.
SAVE THIS INSTRUCTION MANUAL.
The following _ explicit definitions apply in this
manual:
Note : If disregarded, inconvenience only, no
risk of equipment damage or personal in-
jury.
Caution : Equipment damage may occur, but not
personal injury.
This
Instruction
Manual
covers
the
following
models:
TS-140S : HF Transceiver
TS-680S : All Mode Multi Bander
Illustrations show the TS-140S.
CONTENTS
1.
BEFORE
OPERATION
................0:0ccsesseeeeeeeeeee
3
5-5.
BLOCK
DIAGRAM
.............:cccccesenssenneneees
29
2.
SPECIFICATIONS
AND
ACCESSORIES
u4
5-6.
CIRCUIT
DIAGRAM.
..........ceeeeee
seen
Insert
2-1.
SPECIFICATIONS
4
6.
MAINTENANCE
AND
ADJUSTMENTS
31
2-2.
ACCESSORIES
5
6-1.
GENERAL
INFORMATION
.........
31
3.
INSTALLATION
AND
CONNECTION.
6
G2.
SERVICE
otis
ccsmcsasiies
31
3-1.
INSTALLATION
....
6
6-3.
CLEANING..............0
31
3-2.
CONNECTION
.
6
6-4.
IN
CASE
OF
DIFFICULTY...
-32
4.
OPERATION...
as
9
6-5.
ORDERING
SPARE
PARTS....
-33
4-1.
OPERATING
CONTROLS
.
oo
6-6.
ADJUSTMENTS............
33
4-2.
RECEIVER
OPERATION.
...........:c00seeeeeeeees
16
7.
OPTIONAL
ACCESSORIES
..
.35
4-3.
7-1.
CW
FILTER
INSTALLATION.....
35
4-4.
4-5.
4-6.
5-1
5-2. TRANSMITTER SECTION
5-3. RECEIVER SECTION
5-4. CIRCUIT BOARD DESCRIPTION
7-2. TU-8 TONE UNIT INSTALLATION..... .35
7-3. IF-10C INTERFACE KIT INSTALLATION......36
7-4. OTHER ACCESSORIES ........... 37
8. REFERENCE..............00..... -40
8-1. ANTENNA INSTALLATION. -40
8-2. MOBILE OPERATION.............. 41
8-3. RADIO FREQUENCY ALLOCATION............ 43

1. BEFORE OPERATION
Safety precautions
Never remove the case unless instructed to do so in
this Manual. If the internal parts are touched ac-
cidentally, a serious electric shock might occur.
Never touch internal parts.
If a metal object, such as a hair pin or a needle,
comes into contact with the power socket on the
rear panel, a dangerous electric shock may result.
For families with children, never permit children to
put anything, especially metal, inside this unit.
——
Touching the power plug when your hands are wet
may result in a serious electric shock.
=
Never touch with wet hands.
Os
Never pull, bend or extend the power cord. This
could damage the power cord, resulting in a broken
cord or short-circuit.
Always grasp the plug.
In case of abnormal odor
If an abnormal odor or smoke is detected, immediate-
ly turn the power OFF and pull out the power cord.
Contact your dealer or nearest Service Station.
Notes on installation
Do not place the unit in a place which is exposed to
direct sunlight, near a heating appliance, etc.
Do
not
store
or
use
the
unit
in
a
dusty
location
or
in
a
moist
atmosphere.
Select
a
location
where
there
is
good ventilation.
To
maintain
good
ventilation,
do
not
put
anything
on
top
of
the
unit.
Place
the
unit
at
least
10
cm
away
from
the
walls.
Choose a location that is relatively free from vibra-
tion.
Cleaning
Do
not
use
volatile
solvents
such
as
alcohol,
paint
thinner,
gasoline,
benzine,
etc.
to
clean
the
cabinet.
Use
a
silicone
cloth
or
a
clean
dry
cloth.
Silicone cloth Thinner Benzine

2. SPECIFICATIONS AND ACCESSORIES
2-1. SPECIFICATIONS
aa Model TS-140S TS-680S
Specifications
Me J3E (LSB, USB), A1A (CW),
ece A3E (AM), F3E (FM)
Antenna impedance 50 ohms
Power requirement 12 to 16 VDC (13.8 VDC reference)
Grounding Negative
Receive mode with no 115A
§ | Current drain input signal }
é Transmit mode 20A
Operating temperature —10 to +50°C (+14 to +122°F)
Frequency stability Less than +10 PPM
Frequency accuracy Less than +10 PPM
F H “ie de 2 281 x 107x305 mm
Dimensions (W x Hx D) (Projections included) (11-1/16"x 4-7/32"% 12")
Weight 6.1 kg (13.4 Ibs)
160 m band 1.8 to 2.0 MHz
80 m band 3.5 to 4.0 MHz
40 m band 7.0 to 7.3 MHz
30 m band 10.1. to 10.15 MHz
20 m band 14.0 to 14.35 MHz
Frequency range
17 m band 18.068 to 18.168 MHz
15 m band 21.0 to21.45 MHz
12 m band 24.89 to 24.99 MHz
10 m band 28.0 to29.7 MHz
6 m band rar’ 50.0 to 54.0 MHz
SSB 110W «1 100W «1
hOO"yT Dand = cw 100 W «1
15 m band
AM 40W «1
5 5-05 bapa SSB - CW 100 W
= AM 40 W
a
5 Output power SSB 100 W 95 W
ad cw 95 W
10 m band
FM 50 W
AM 40 W
6 muband SSB -CW- FM eS SS 10 W
AM ——— 4wW
LSB, USB Balanced modulation
Modulation FM Reactance modulation
AM Low level modulation
Spurious radiation (CW)
1.9 MHz to 29.7 MHz
Less than —40 dB
50 MHz to 54 MHz
Less than —60 dB
Carrier suppression
More than 40 dB (with 1.5 kHz reference)
Unwanted sideband suppression
More than 50 dB (with 1.5 kHz reference)
Maximum frequency deviation (FM)
+5 kHz
Frequency response (—6 dB)
400 to 2600 Hz
Microphone impedance
500 ohms to 50 kQ

Specifications ae TS-1408 TS-G508
Circuitry Double conversion superheterodyne
Frequency range 500 kHz to 30 MHz ae ivi s Sas
Intermediate frequency 1st: 40.055 MHz, 2nd: 455 kHz
500 kHz to 1.6 MHz Less than 3.98 pV
LSB, USB, CW 1.6 MHz to 21.5 MHz Less than 0.25 pV
(at 10 dB S+N/N) 21.5 MHz to 30 MHz Less than 0.25 pV | Less than 0.18 pV «2
50 MHz to 54 MHz Less than 0.16 pV «2
ee 500 kHz to 1.6 MHz Less than 39.8 pV
Sensitivity Ash 1.6 MHz to 21.5 MHz Less than 2.5 nV
(at 10 dB S+N/N) 21.5 MHz to 30 MHz Less than 2.5 yV | Less than 1.78 pV +2
re 50 MHz to 54 MHz Less than 1.58 pV «2
2
FM
21.5
MHz
to
30
MHz
|
Less
than
0.35
»V_|
Less
than
0.18
pV
+2
& (at 12 dB SINAD) | 50 MHz to 54 MHz — Less than 0.18 pV +2
LSB, USB, CW —6 dB: 2.2 kHz, —60 dB: 4.4 kHz
Selectivity AM —6 dB: 6 kHz, —50 GB: 18 kHz
FM —6 dB: 12 kHz, —50 dB: 25 kHz
Image ratio More than 50 dB
1st IF rejection More than 50 dB
IF SHIFT variable range More than +1.2 kHz
10 Hz STEP More than +1.2 kHz
RIT variable range
20 Hz STEP More than +2.5 kHz
Squelch sensitivity (FM) Less than 0.32 pV
Output 1.5 W across 8 ohms load (10% distortion)
Output load impedance 8 ~ 16 ohms
Notes:
1. *1: The output power on the 160 m band is limitted to 10 W depending on local regulations.
2. *2: This is valuable when the RF AMP switch is turned ON.
3. Circuit and ratings are subject to change without notice due to advancements in technology.
2-2. ACCESSORIES
Unpack your TS-140S/680S carefully and confirm that it is supplied with the following accessories.
Dynamic microphone (Except European and U.K. version) .
DIN plug (7-pin).......
DIN plug (13-pin).....
DC power cable assembly
Calibration cable
Fuse (20A)
Instruction manual...
..-E30-2065-05 .
T91-0352-05....
E31-2154-05....
FO5-2036-05....
B50-8199-XX ...
copy
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After unpacking
Shipping container:
Save the boxes and packing in the event your unit needs to be transported for remote operation, maintenance, or
service.

3. INSTALLATION AND CONNECTION
3-1. INSTALLATION
3-1-1. Bail
The transceiver can be elevated for operating conve-
nience.
Caution:
Do not use the bail to carry the transceiver.
3-2. CONNECTION
3-2-1. Fixed Station
The TS-140S/680S requires more than 20A at
13.8 VDC when transmitting at full power. Use the
eae PS-430 power supply for fixed station >.
A. Rear Panel Key
TS-140S 1
i pw DIVIONLD OO00000 OOOOOOOD F UOLLUCCCUUOOCOOC COCKE —
ig T0 MOUTON ess O apR|p
—
Ace
i
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§
To
the
external
appliances
To
AC
outlet
To antenna tuner @——_——————————__—
Ground
Data
communications
device
YZ,
EXCITER, TS-140S/680S TL-922A
Spe ADUUNT NETO HUGH TOTUOUMEOCUT STULL
- § *—_—UUOO O000OOOT sem
ie
=
q
a
4
}
a
u
l
AC LINE
GROUND
BUSS
RF
OUTPUT
CAUTION:
Do not connect the power cable unless the
TL-922A POWER switch is set to the OFF
TL-922A Interconnection to TS-140S/680S _Pesition.

(1) Antenna
Caution:
Protect your equipment—Use a LIGHTNING AR-
RESTER.
The type of antenna that is used will greatly affect
the performance of the transceiver. Use a properly
adjusted antenna, of good quality, to enable your
transceiver to perform at its best. The antenna input
impedance is 50 ohms. Use 50-ohm coaxial cable
such as 5D-2V for this connection. If the antenna is
far from the transceiver the use of low loss coaxial
cable, such as 5D-2V is recommended. Match the
impedance of the coaxial cable and that of the anten-
na so that the SWR is less than 1.5 to 1. The protec-
tion circuit in the transceiver will activate if the SWR
is particularly poor (greater than 3 to 1). High SWR
value will cause transmitter output to drop, and may
lead to TVI or BCI reports.
(2) Grounding
Caution:
Never use a gas pipe or electrical conduit pipe.
Notes:
1. A ground connection that is a 1/4 wavelength or
its multiple may provide a good DC ground, but it
will not provide a good RF ground.
2. A city water pipe cannot be used as a good earth
in some cases.
Making a good earth connection is important for
preventing dangers such as electric shock and for
emitting a high quality signal with minimum spurious
radiation. Bury a commercially available ground rod
or copper plate under the ground and connect it to
the GND terminal. A thick wire, cut as short as possi-
ble, should be used for the connection. To make a
good earth connection, connect the GND terminal to
a grounded metal water pipe.
(3) External speaker
The
TS-140S/680S
includes
a
built-in
speaker.
If
you
would
like
to
use
an
external
speaker,
such
as
the
SP-430,
it
may
be
connected
to
the
EXT
SP
jack
on
the
rear
of
the
radio.
The
speaker
may
be
any
good
8
ohm
permanent
magnet
type
speaker.
The
diameter
should
be
at
least
4
inches
for
good
audio
quality.
If
you
plan
on
using
a
speaker
other
than
the
SP-430
it
should
be
equipped
with
a
miniature
phone
jack
plug.
The
internal
speaker
is
disabled
when
the
external
speaker
plug
is
inserted
into
the
receptacle.
(4) Key connection
Your
key
should
be
connected
as
illustrated
in
the
figure
below.
When
using
an
electronic
keyer,
make
sure
that
polarity
is
set
for
positive.
Always
use
shielded
line
from
the
key
to
transceiver.
Before connecting, check that the
polarity is correct. The KEY jack pro-
vides +5.5 V. Use shielded cable.
KEY
+5.5V
To
key
J
ae
=:
©<
4
==F5=
GND
Key connection
B. Front Panel
Microphones
(1) Headphones
Any low-impedance (4~ 16 ohms) headphones may
be used with the transceiver. Connect the head-
phones to the front panel phone jack.
The optional HS-5 or HS-6 headphones are best
suited for use with the transceiver. Stereo type
headphones can also be used.
(2) Microphones
Any microphone with an impedance between 500
and 50 kQ may be used with this transceiver.
The KENWOOD microphones MC-43S (handheld),
MC-60A, MC-80, MC-85 (table-top type) are
recommended.
You can switch send/receive by voice if a voice con-
troller is connected. (TS-680S only)
(3) Voice Controller (TS-680S only)
We recommend the use of VOX-4.
Simply connect the MIC cable to the MIC jack.
7

3-2-2. Mobile
Antenna
SP-50B or
SP-40
Accessories DC cable
To battery
A. Battery connection
Connect the supplied power cable with fuse directly
to the battery terminals. Connecting to the cigarette
lighter socket can cause a poor connection, and ex-
cessive voltage drop.
Cautions:
1. Before installing the power cable, be sure to
remove the negative lead from the battery for
safety.
. After installation and wiring, be sure to double
check for correct installation before reconnecting
the negative lead to the battery terminal.
If the fuse opens, be sure to check that each con-
ductor has not been damaged by short-circuiting,
etc.
Then replace with a new fuse of the same rating.
. After completing the wiring, wrap the fuse holder
with heat resistant tape to protect against heat
and moisture.
Do not remove the fuse even if the power cable is
too long.
B. Ignition Noise
The transceiver has been designed to suppress igni-
tion noise; if excessive noise is present, it may be
necessary to use suppressor spark plugs (with
resistors).
Ground
Transceiver
Batter sf
Zn Rubber grommet
To battery
Consider ease of operation and safety when
selecting the installation location when installing the
transceiver in a vehicle.
White/Red
secure the cable.
Select the location
where the power cable
is protected from heat,
moisture or abrasion
Make sure the positive (+) and negative (—) lead polarity are correct when wiring to the battery.
Chassis or
fire wall
To the transceiver
Make sure the cable
does not directly con-
tact the edge of the hole
by using a grommet.

4. OPERATION
4-1. OPERATING CONTROLS
4-1-1. Front Panel
® ®@ ®@ © ®©©
Note:
All segments on the Display Panel and Indicators are
shown on for this explanation.
® ® © OO®Q ®
{=
4 ot | tge uss M.CH SCAN AVFOB SPLIT 3
OFF SAMI FULL
OFF SqMLFULL
exh fo EF wOhGRBRAEEE -alp GD
ON QOFF ‘ON AIR CS M.SCA cS FLOCK 1MHz PWR
— a vay
2 EEKENWOOD =nuitiavoch Ts-1405- C= t—_19)
HONES
a
oe
MIC
6 MEMORY M.CH/YFO CH MODE MIN Max |
OTN
O
RF GAIN il
MIN MAX
(With the TS-680S)
> AGC ae al
@ POWER switch Se
Press to turn the power ON or OFF.
@
@ Program keys
F.LOCK : The selected dial frequency and mode are
locked.
MeV: Used to transfer a frequency from
memory to the VFO.
M.IN : Used to enter data into a memory channel.
VFO/M : Used to switch between memory or VFO
operations.
SCAN _: Pressing during VFO operation will initiate
program scan, and pressing during
memory operation will initiate memory
scan.
CLEAR : Used when reentering memory channel
data, erasing a memory channel, clearing
scan, or when specifying the channels
that will be skipped during scan opera-
tions.
@ Meter
During receive the meter is used as an S-meter. Dur-
ing transmit the function of the meter is controlled
by the Meter switch @ , and provides either ALC
level, or PWR (power) readings.
@ M.CH/VFO CH (Memory channel/VFO
channel) control
This control is used to change the frequency in 10
kHz steps during VFO operations. This is convenient
when large changes in the operating frequency are
@ Q BW @d wd
required and for FM operations.
This control is also used to select the desired
memory channel during Memory Channel Operation.
© Indicators
ON AIR : Lights during transmit.
M.SCR_ : Lights when the M.IN key is pressed.
When the memory scroll function is active
you can review the contents of the
memory channels without a loss of the in-
coming receive frequency.
F.LOCK : Lights when the F.LOCK key is ON.
1 MHz _: Lights when the 1 MHz step switch is ON.
© MODE keys
These keys are used to select the desired mode of
operation. In CW mode the CW/N key is also used to
select the desired filter bandwidth. When a MODE
key is pressed the first character of that mode will be
sounded in Morse code thru the internal speaker.
This announcement can be inhibited by following the
instructions in Section 4-2-8.
LSB/USB key : Press the LSB/USB key to alternate
between LSB and USB.
CW/N key : Press the CW/N key to alternate be-
tween CW (SSB filter) and N (nar-
row).
Note:
There will be no audio from the
speaker in the CW narrow position if
no optional CW filter is installed.
AM/FM key : Press the AM/FM key to alternate
between AM and FM.

@ _ Display Panel
The fluorescent display tube displays operational in-
formation such as the operating frequency, memory
channel information, and RIT information. (See page
13.)
FUNCTION keys
A/B_ : Selects VFO A or VFO B.
SPLIT: For split frequency operations; A-R, B-T (A
receive, B transmit), or B-R, A-T.
A=B : Equalizes the frequencies and modes of VFO
A and VFO B.
@ _ RIT control
When the transmit frequency of the distant station
drifts a little bit during the QSO, but you do not wish
to alter your transmit frequency to compensate, you
may wish to make use of the RIT control function.
This control allows shifting the receive frequency
without shifting the transmit frequency. The RIT
control allows you to shift the receiver frequency.
This control is also useful for pileups when the DX
station is transmitting a little above or below his
receive frequency.
The RIT step size is either 10 Hz or 20 Hz. Please
refer to Section 4-2-8 for information on how to
select the desired step size.
Notes:
Tt The RIT offset is displayed on the main display.
You can therefore preset the offset before you
actually need to use it. When you move to
another station make sure you turn OFF the RIT
switch.
. The figure at the right illustrates that the RIT
display and the VFO display may not agree exact-
ly in all instances since the RIT and VFO tune in
10 Hz steps. The normal resolution of the VFO is
100 Hz, so if the RIT or VFO is turned slowly the
associated display may not update immediately.
You will have to tune 100 Hz to see the display
actually change.
VFO RIT
A
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[Foo
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5 sy
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(aS a ga -0.0) 9
so000
(299 RG)o -3. i} 0
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ines s “0. i} }
10
IF SHIFT control
The IF SHIFT control allows you to shift the IF pass-
band of the receiver, without changing the actual
center frequency of the receiver. This control is
useful when there is interference near your center
frequency.
Note:
The IF SHIFT control does not function in the AM or
F
USB mode
Interference from lower frequencies can be
reduced or eliminated by rotating the IF SHIFT
control in the @ direction. This will cause the
resulting audio frequencies to have a slightly tre-
ble response, i.e.low cut filter (low frequencies
attenuated). Interference from higher frequencies
can be reduced or eliminated by rotating the IF
SHIFT control in the © direction. This will cause
the resulting audio frequencies to sound a little
bassy, i.e.high cut filter (high frequencies at-
tenuated).
LSB mode
Interference from lower frequencies can be
reduced or eliminated by rotating the IF SHIFT
control in the @ direction. This will cause the
resulting audio frequencies to sound a little
bassy, just the opposite of the effect in the USB
mode. Interference from higher frequencies can
be reduced or eliminated by rotating the IF SHIFT
control in the © direction. This will cause the
resulting audio frequencies to appear a little on
the high side, again just the opposite of the USB
mode.
M modes.
es
Turned counterclockwise
=
Turned clockwise
=>
IF filter passband
characteristic
® ®
Signal \
Interfering signal (e)
Signal
Signal
(e) Interfering signal (e)
RIT—@—IF
SHIFT
RIT—@-—IF
SHIFT
RIT—@-IF
SHIFT
@
© 4
Turn the knob counterclock-
wise to eliminate interference
from signal ©).
Turn the knob clockwise to
eliminate interference from
signal @).
IF SHIFT operation

() SQL (Squelch) control
Note:
This function operates in the FM mode only.
This control is used to eliminate atmospheric noise,
and receiver static noise during no signal periods.
Slowly rotate the control clockwise to the point
where the ambient noise just disappears, and
speaker shuts off. This point is known as the squelch
threshold point. Now you will only hear output from
the speaker when an incomming signal is present.
For weak signal reception this control should be fully
counterclockwise.
@2 AF gain control
Turn the knob to increase or decrease the volume.
Clockwise rotation increases the volume and
counterclockwise rotation decreases the volume.
Note:
The output level of the ’’Beep’’ is not affected by the
setting of the AF gain control.
@3 CW OFF/SEMI/FULL (Break-in) switch
This switch affects the transmit/receive recovery
time. In the SEMI position the transceiver will key
when the key is depressed and remain in the transmit
position until a preset delay has been reached. In the
FULL position the transceiver will switch back to
receive as soon as the key is released, thus allowing
you to copy incoming signals between characters.
The CW switch must be in the FULL position when
transmitting a carrier for antenna adjustments, etc.
PWR (Power) control
Power can be controlled in the FM, LSB, and USB
modes only. In CW this control functions as the
CARRIER level adjustment. This control should be
adjusted so that the pointer on the meter remains
within the ALC section marked on the meter, in the
CW transmit mode, and for 40 watts of un-
modulated power output in the AM mode.
[50 MHz : 4 watts (TS-680S only)]
(§ MIC gain control
Microphone gain can be adjusted during USB, LSB,
and AM operations. Gain is increased by moving the
control to the right.
(6 RF GAIN control
This control adjusts the gain of the receiver high-
frequency amplifier section.
For normal receiver performance, and maximum
gain, this control should be all the way to the right. If
you are having trouble copying the desired signal
make a note of the stations peak S-meter reading.
Then, adjust the RF control left, so that the meter
needle is stationary at this level. Now, all signals that
were less than the desired signal will be attenuated,
such as static noise, etc., making reception easier.
If the incoming signal pegs the S-meter you can also
reduce the receiver gain by moving the RF GAIN con-
trol to the left. The S-meter pointer will always ad-
vance up-scale as the RF control is moved to the left,
as a visual reminder that the gain of the radio has
been reduced.
Simultaneous use of the RF GAIN control and AGC
switch
If a strong signal (such as a local station) appears in
the vicinity of the intended receive signal, the
S-meter may show unusual deflection due to the
AGC voltage developed from the strong disturbing
signal. If this occurs, move the RF GAIN control to
the left so the meter pointer remains at about the
original deflection peak and turn the AGC switch to
the FAST position. This will reduce the unwanted
AGC voltage and permit clear reception.
@ NB LEVEL control
Controls the noise blanker operating level.
Use only the minimum level necessary.
(8 NB 2 switch
Noise blanker 2 is used for long duration pulse noise,
like
the
‘‘woodpecker’’.
To
reduce
‘‘woodpecker’’
radar noise interference, set switch NB 2 to the ON
position (NB 2's effectiveness depends on the
specific type of interference). If you use NB 2 for
short duration pulse noise, the receive tone may
become distorted, making it difficult to hear.
Unfortunately
no
noise
blanker
can
remove
all
dif-
ferent types of interference; but the two noise
blankers
that
have
been
provided
in
the
TS-
140S/680S are effective in most cases.
If
there
is
no
‘‘woodpecker’’
present,
the
switch
should
be
in
the
OFF
position.
NB 1 switch
For
pulse
type
noise,
such
as
generated
by
automotive
ignition
systems,
turn
the
NB
1
switch
ON.
When
pulsating
noise,
such
as
that
caused
by
automobile
ignitions
is
encountered,
place
the
NB
1
switch
ON.
This
switch
will
not
help
to
eliminate
atomospheric
or
line
noises,
only
pulse
type
noise.
@ RIT switch
Press to turn the RIT ON or OFF.
@) 1 MHz switch
This
switch
is
used
to
determine
if
the
UP/DOWN
switches
will
function
in
1
MHz
steps
or
only
thru
the
amateur
bands.
When
the
1
MHz
step
position
is
selected,
the
1
MHz
indicator
will
light.
@ UP/DOWN switches
Pressing
the
UP
switch
increases
the
frequency,
and
pressing
the
DOWN
switch
decreases
it.
11

@ TUNING knob (VFO)
Rotate the knob to select the desired frequency. Fast
tuning is possible by rotating the knob rapidly. This
knob may also be used to select the desired memory
channel. The dial drag is adjustable by holding the
outside knob and turning the inside knob clockwise
to increase drag, and counterclockwise to decrease
drag.
@ VOX switch (With the TS-140S)
VOX (Voice Operated Keying) operation is possible
in LSB, USB, FM or AM operations. To activate the
VOX circuitry place the VOX switch ON.
RF AMP switch (With the TS-680S)
Depress this control when receiving weak signals.
Note:
The RF amplifier does not function below 21.5 MHz
even if this switch is ON.
@ AGC switch
This switch selects the operating time constant of
the AGC (Automatic Gain Control) circuit. When the
AGC switch is set to SLOW, the receiver gain and
S-meter readings will react slowly to large input
changes, and when set to FAST, the receiver gain
and S-meter will react quickly to changes in the input
signal level.
The normal position when using all modes is the
SLOW position. When working any of the following
you might wish to use the FAST position.
e When tuning with the TUNING dial.
e When receiving weak signals.
e When a high-speed CW signal is being received.
Note:
This switch is disabled during FM operations.
@8 ATT (Attenuator) switch
The incoming receive signal level is attenuated by
approximately 20 dB when this switch is activated.
When the incoming receive signal is very strong
(20 dB over S-9), the signal should be attenuated to
prevent distortion of the signal, thereby stabilizing
the receiver performance. This is easily done by ac-
tivating the ATT switch. This control is also useful
when a strong signal is near your desired signal,
while some loss will occur to the desired signal as
well as the undesired signal, the use of the at-
tenuator will sometimes allow you to complete the
aso.
12
@ ALC/PWR meter switch
ALC meter
Used to monitor the drive level in USB, LSB, and AM
modes.
PWR meter
Used to indicate the output power. Note that this
meter is a peak reading meter, not an average
reading meter.
@8 PROC (Processor) switch
Effective transmit power output will increase when
the PROC switch is turned ON during USB, LSB, or
AM mode operations. ((<7 4-3-6. Speach Processor)
Note:
When the speech processor function is used in the
USB, LSB, or AM mode it is possible to overdrive the
transmitter: An easy way to check for excessive
modulation is to monitor the ALC meter. If the needle
is over the ALC zone you are overmodulating.
Reduce the MIC gain control setting until the needle
remains in the ALC zone on voice peaks.
@) Standby switch
This switch is used when you want to manually con-
trol transmit or receive.
SEND: Places the radio into transmit.
REC : Places the radio into receive.
60 MIC jack
Microphone connection.
GND (STBY)@
MICa 7GND (MIC)
STBY @
®NC
DOWN®s
® 8V/approx. 10 mA
UP4
MIC connector (Front view)
61) PHONES jack
Output terminal for headphones.

A. Display Panel
@ MODE display
@ M.CH display
@® SCAN display
@ VFO A/B display
@® SPLIT display
© * display
@ RIT display
RIT frequency
display
CW CWN
ORC)
: Indicates the selected mode.
: Turns ON during a Memory
Channel operation.
: Turns ON during scanning.
: Turns ON when VFO A (or
VFO B) operates.
: Turns ON during split opera-
tion.
: Lights during selection or
operation on memory chan-
nels 20 to 30. (See Sections
4-4 and 4-5 for additional in-
formation on this indicator.)
: Turns ON when using RIT.
: Shows the amount of RIT
offset to the nearest 100 Hz.
Note:
Minus ‘’—’’ appears in the
display when the RIT offset
is below the transmit fre-
quency.
tsB usB M.CH SCAN AVFOB_ SPLIT
AM FM SEGARA baEE -4.4
RIT
®
® Frequency display: Indicates the operating fre-
quency. Frequency resolu-
tion is selectable between
10 and 100 Hz. Please refer
to Section 4-2-8 for addi-
tional information on the
selection process.
: The @ display indicates the
Memory Channel currently
display will be skipped dur-
ing Memory Channel scan.
(Please refer to Section
4-5-5.)
) e display
() Memory Channel
number display : Memory Channel Number is
displayed.
13

4-1-2. Rear Panel
@ > ANT (Antenna) connector
This connector should be attached to a suitable
antenna for transmitting and receiving. The antenna
cable should be 50-ohm coax, terminated with a
PL-259 connector.
@ GND (Ground) terminal
To prevent electric shock, as well as RFI and BCI,
connect the transceiver to a good earth ground.
@ DC power connector
This is used to connect the DC power supply.
® ACC 2 jack
Terminal numbers and their applications are as
follows:
View from the
rear panel.
13-pin DIN plug (E07-1351-05)
14
Pin No. Pin Name Application
1 NC No connection
2 NC No connection
3 Data output Output level is fixed regardless of
the AF control setting.
Output voltage:
300 mV or more at maximum
receiving input with 4.7 kQ load.
GND
Grounding (The shielded wire of the
audio output terminal is connected
here.)
Psa.
This pin is used for connecting a
TNC (Terminal Node Controller) for
use with packet radio. It is the
Squelch Control terminal and will not
allow packet communications while
squelch is off.
NC
No connection
NC
No connection
GND
Grounding
© }/@O;N |
PKS
This terminal disconnects the
microphone and places the
transceiver into transmit when a
ground is applied to this terminal.
10 NC
No connection
11 PKD
This is the MIC (microphone) input
pin from the terminal unit. The input
level is approximately 10 mV.
12
GND
Grounding (The shielded wire of the
audio input is connected here.)
13 Standby
Standby terminal
Grounding transmits.

® ACC 1 jack
This jack is designed for connection of the 6-pin DIN
connector supplied with the optional interface unit.
@® KEY jack
Using shielded line, connect a 1/4” phone plug to
this jack for CW operation. Open-terminal voltage is
approximately 5.5 VDC.
@® ACC 8 terminal
This terminal is used to access the automatic anten-
na tuner AT-250.
Caution:
The TUNER switch should be turned off if the
transceiver will be used on frequencies outside the
range of the AT-250.
REMOTE connector
Note:
When the control relay is used refer to section 6-6-8.
+12 VDC ON transmit GND
max. 10 mA. ~ ALC input
From standby switch
(PTT circuit for foot switch) Speaker output
T
R Control relay
View from cord
a SSS
£5 Els
@ EXT. SP (External speaker) jack
This jack is for connection of an external speaker.
@ VOX GAIN control (TS-140S only)
This control adjusts the sensitivity of the VOX
amplifier. Adjust this control for your personal
preference.
VOX GAIN
(2)
@ ANTI VOX control (TS-140S only)
VOX operations are sometimes difficult with high
speaker volume control settings. The ANTI VOX
control is used to reduce the tendency of the VOX to
activate from inputs from the speaker. The ANTI
VOX control is not active when headphones are con-
nected, for obvious reasons!
ANTI
©)
@® DELAY control
This control adjusts the ‘‘hang-time’’ that the radio
will remain keyed after voice input has stopped.
DELAY
‘€)
4-1-3. Microphone
@® @ UP/DWN (Up/Down) switches
These switches are used to step the VFO frequency
or memory channel up and down. The frequency will
change continuously if the switches are pressed and
held.
@ PTT (Push To Talk) switch
The
transceiver
will
be
placed
into
Transmit
whenever
this
switch
is
pressed.
Operations
such
as
scanning,
code
squelch
operations,
and
channel
linkage
will
be
cleared
when
this
switch
is
pressed.

4-2. RECEIVER OPERATION
4-2-1. Beep Tones
Audible confirmation of microprosessor functions is
provided in the form of a series of audio beeps.
4-2-2. Audible Mode Announcement
When a Mode key is pressed, the first character of the
mode is sounded in Morse code thru the speaker.
The output level of the ‘’Beeper’’ is adjustable with a
variable resistor located inside the set. (Please refer Made Morse.Code
to Section 6-6-4) USB oe
LSB ‘ee
Beep Tone Indication CW (Wide) —-—-
1 short beep | When the following keys are CWN (Narrow) _—-
pressed:
AM
ee
A/B, SPLIT, F.LOCK, A=B,
MeV, SCAN, CLEAR, M.IN FM eae
(When the Memory Scroll mode
is selected.), VFO/M, BAND Noiz:
P, t , RIT, LSB, = 5
Nee ARAN: ! 1 short beep can be selected by pressing the CW/N
s z key and the power switch ON. (Please refer to Sec-
1 long beep When the M.IN key is pressed tion 4-2-8)
again to enter the data.
3 short beeps | A.When the SCAN key is pressed
and the receiver is unable to
memory scan. *2
. When all memory channels are
empty and attempt to select
memory channel with 1 MHz
switch ON. *2
C.When all memory channels are
full and attempt to find out an
empty channel with 1 MHz
switch ON. *2
ive}
Notes:
*1 : 1 short beep can be selected by pressing the
CW/N key and the power switch ON.
(Please refer to Section 4-2-8)
*2 : 3 short beeps can be selected by pressing the
F.LOCK key and the power switch ON. (Please
refer to Section 4-2-8)

4-2-3. Receiving
POWER switch : OFF (=)
RIT control : Center
IF SHIFT control : Center
RIT 2 eT
acc
RSENORECA PROC AALCIPWRO ATT mnsrSGwO VOX
[| POWER kd 2 Use use -M.CH SCAN AVEO SPUT + ar ocr Su eu
peng teow auew 88. 8. 8. &. 8.8.8.8. -8.8} |- + || GD SQL control :
20N
OFF
Se
=a
ie
ea
Fully
counterclockwise
E == 15.140 = SS ==) :
PHONES.
EKENWOOD
=
———
=
AF
gain
control
:
FANCTION a ae ,
EMORY
M.chivro
cH
re
(
Fully
counterclockwise
FLoGeY [WFOMY [Reuey | ee MO
AX
te
ax
[Mev ‘SCAN \ ‘CWIN ‘SPLIT
RE —— By cles RF GAIN
(MINS) (CEA [AM/FM AsB s
Pe) a control : MAX
(ORD eaNOUB | ms wT Ne: Ne
NB LEVEL
control : Center
oY
|
OFF (m) | OFF(m)
REC (m) SLOW (m)
Note:
All segments on the Display Panel and Indicators are
shown on for this explanation.
1. Preset the controls as shown in the accompanying
illustration.
2. Turn on the DC power supply (Fixed station) and
then turn the transceiver’s power switch ON. The
display panel will indicate as shown below.
usB AVFO
ruUnnnsn
et LI Le LS
Note:
If the display is not as shown reset the
microprocessor using the procedure in Section
4-4-2.
3. Select the desired mode using one of the MODE
keys.
4. Adjust the AF gain control for the desired volume.
5. Press the UP/DOWN switches to select the
desired frequency band.
6. Slowly rotate the TUNING knob until the desired
signal can be heard clearly.
4-2-4. Dual Digital VFO’s
Operational convenience can be enhanced thru the
use of both VFO A and VFO B.
Two VFO’s are provided to allow you to change fre-
quencies rapidly. You could set one VFO to the lower
tuning range and the other VFO to the upper tuning
limit. You can set either VFO to any frequency you
desire.
(a)A=B key
Depressing this key causes the data contained in
the inactive VFO (the VFO that is not currently be-
ing displayed) to change to the same data contain-
ed in the active VFO (the one currently displayed).
Both the frequency, mode and antenna selection
are changed.
OFF ( =)
For example:
VFO A is set at 7 MHz in LSB, and VFO B is
21 MHz in USB. VFO A is the active VFO (show
on the display). Depressing the A=B key will
cause VFO B to change to 7 MHz in LSB.
(b)A/B key
Allows selection of the desired active VFO. Each
time this key is depressed the active VFO will
alternate between VFO A and VFO B.
(c)SPLIT key
Allows the use of one VFO for transmit, and the
other for receive (Split Frequency operation).
For example:
VFO A is the active VFO, and VFO B is the inactive
VFO. Depressing the SPLIT key will cause the TS-
140S/680S to receive on VFO A and transmit on
VFO B. The mode of reception and transmission
will follow the mode contained in the appropriate
VFO memory. It is possible to work cross band,
cross mode if desired.
To avoid confusion during contest, or pile-up
operations we recommend using VFO A for
receive and VFO B for trasmit.
4-2-5. Frequency Step
1. The frequency step is set automatically depending
on the mode that has been selected.
Frequency Step
Mode | USB/LSB/
aan
CW/CWN
AM/FM
Frequency step 10 Hz 100 Hz
One revolution
of TUNING knob | 10 kHz ae
17

2.When a 10Hz or 100 Hz frequency step is
selected rapid tuning is possible by rotaing the
TUNING knob quickly.
When the TUNING knob is rotated at about 3
revolutions a second a geometric increase in the
tuning step occurs, that corresponds to the speed
of dial rotation.
4-2-6. SSB AUTO mode shift
This transceiver automatically selects the ap-
propriate sideband when in the SSB mode.
500 kHz 9.5 MHz 54 MHz
LSB
USB
Notes:
1. USB is selected from at 9.5 MHz and above.
2. The AUTO mode selection will not function when
using RIT.
4-2-7. CW zero-beat Operation
1. When an optional filter is not used, tune the TUN-
ING knob so that the receive beat frequency is ap-
proximately 800 Hz.
2.When an optional CW filter is installed the
simplest method to use is to adjust the TUNING
knob for maximum S-meter deflection.
800 Hz
SSB filter passband
CW filter
t
1
!
!
i Passband
!
!
\
|
|
|
I
I
1
I
1
4
*
Frequency
—=
BFO
Displayed
frequency
4-2-8. Power on function selection
Several
of
the
functions
of
this
transceiver
can
be
changed
at
the
time
the
trasceiver
is
turned
ON.
Repeat when releasing each function.
Switch or key These functions include
CLEAR 10 Hz Main display resolution: ON/OFF
RIT
RIT
step
frequency
selection:
10
Hz/20
Hz
AM/FM
AM
step
frequency
selection
for
the
522
kHz
to
1620
kHz
band:
9
kHz/10
kHz
SCAN Program scan hold: ON/OFF
CW/N
Audible
mode
announcement:
Beep
tones/Morse
code
F.LOCK
Audible
alarm:
Beep
tones/Morse
code
1 MHz BAND switch (1 MHz switch is ON): 500 kHz/1 MHz
4-2-9. Alarm Function
Several
alarms
have
been
included
to
signal
errors
that
you
might
encounter.
The
chart
below
lists
the
possible
causes and the resulting Morse code alarm.
Morse code will be heard from the speaker.
Indication
Morse Code
When the microprocessor is reset.
(RESET)
When the system is unlocked.
(UNLOCK)
When the SCAN key is pressed and the receiver is
unable to memory scan. *
(CHECK MEMORY)
When all memory channels are empty and attempt to
select memory channel with 1 MHz switch ON. *
(EMPTY)
When all memory channels are full and attempt to
find out an empty channel with 1 MHz switch ON. *
(FULL)
Note:
*
:
3
short
beeps
can
be
selected
by
pressing
the
F.LOCK
key
and
the
power
switch
ON.
(Please
refer
to
Section
4-2-8.)

4-3. TRANSMITTER OPERATION
Preset the controls as shown in the accompanying il-
lustration.
RNS iF SHIFT
° W
POWER s\AEL2 2 80 isa Use MOH SCAN AVFO® SPLIT + Rr (ZB => (ore Sih eu.
POWER
l
ASE
surw
88.
8.8.6.8.
.8.8.
-8.8|
|-
+
|_@aD-
OFF
switch:
20N
BOFF
OARS
MER
eS
FLOCKS
ma
PWR
ire
net
EXE
Sau
nose
=
=
cuit
OFF
(
m)
puones
KENWOOD
=i
TS-140S
—
=
mowveo cn CHOBE] vA sy. snisanh .
==,
((serusé
7
feo
Pa.
—
IC
gain
control:MIN
CO
=~
RF
GAIN
control:
MAX
NB LEVEL
Microphone
com)
,
—
[
a
=
ALC(=) Note:
REC(m)
All
segments
on
the
Display
Panel
and
Indicators
are
shown
on
for
this
explanation.
4-3-1. Precaution
Before transmitting check the frequency for activity
so that you do not interrupt another QSO.
4-3-2. SSB (LSB, USB) Mode
1. Place the POWER switch ON.
2. Set the MODE keys to USB or LSB. By interna-
tional convention frequencies below 10 MHz
utilize the LSB (Lower Sideband) mode, and fre-
quencies above 10 MHz use USB (Upper Side-
band). The actual switchover point on the TS-
140S/680S is 9.5 MHz. The TS-140S/680S will
select the proper mode when you tune to the
desired frequency. You can override this by simp-
ly pressing the desired mode key.
3. Press the microphone PTT switch, or set the
standby switch to SEND. The ON AIR indicator
will light.
4. Set the PWR control to the desired level.
5. Speak into the microphone and adjust the MIC
gain control so that the meter deflection does not
exceed the ALC zone on voice peaks.
Note:
Adjustment using the ALC meter provides greater
accuracy than if you try and use the power meter for
adjustment. Never adjust for ALC deflection above
the ALC zone, as this will cause distortion of the
transmitted audio signal.
ALC zone
Notes:
1. Do not exceed the ALC zone on voice peaks.
2.When using high gain microphones or pre-
amplified microphones you might have difficulty
in obtaining proper ALC meter readings, or you
might receive reports of audio distortion. To pre-
vent this type of problem you should set the front
panel MIC gain control to center and reduce the
gain of the internal microphone gain control, by
rotating the control clockwise, until the proper
ALC reading is obtained. The adjustment of this
control is described in Section 6-6-6.
6. Turn on the PROC switch if required. (Please refer
to Section 4-3-6)
7.Release the PTT switch, or place the standby
switch to REC. The ON AIR indicator will turn
OFF.
4-3-3. FM Mode
1. Place the POWER switch ON.
2. Select the desired frequency within the 28 MHz/
50 MHz amateur radio band. (50 MHz : TS-680S
only) Place the MODE key to FM.
3. Press the microphone PTT switch or place the
standby switch to SEND. The ON AIR indicator
will light.
4. Set the PWR control to the desired level.
5.Speak
into
the
microphone,
holding
the
microphone
about
5
cm
away
from
your
mouth.
Close
talking
or
talking
too
loudly
may
reduce
transmission
clarity
or
spread
the
side
bands
too
much.
6.
Release
the
PTT
switch,
or
place
the
standby
switch
to
REC.
The
ON
AIR
indicator
will
turn
OFF.
19

4-3-4. AM Mode
. Place the POWER switch ON.
. Set the ALC/PWR meter switch to PWR.
. Set the MODE key to AM.
. Press the microphone PTT switch or place the
standby switch to SEND. The ON AIR indicator
will light.
5. Adjust the PWR control so that the meter in-
dicates 40 watts. [50 MHz : 4 watts (TS-680S
only)]
PWN
50 MHz BAND _1.8~28 MHz BAND
6. Speak into the microphone and adjust the MIC
gain control so that the meter indicates 80 watts.
[50 MHz : 8 watts (TS-680S only)]
50 MHz BAND 1.8~ 28 MHz BAND
7. Turn on the PROC switch if required. (Please refer
to Section 4-3-6)
8. Release the PTT switch, or place the standby
switch to REC. The ON AIR indicator will turn
OFF.
4-3-5. CW Mode
Sidetone oscillator
The transceiver contains a sidetone oscillator circuit
to permit you to monitor your own signal. If the key
is closed in a mode other than CW, transmit will not
be selected but a sidetone will comes out of the
speaker, to allow Morse code training. The volume
of the sidetone can be adjusted internally. (Please
refer to Section 6-6-3)
Place the POWER switch ON. Set MODE keys to CW.
Placing the standby switch to SEND and depressing
the CW key will cause the radio to transmit.
Transmission is also possible when in the SEMI or
FULL break-in mode by simply depressing the key,
with the standby switch in the REC position.
Adjust the PWR control until the meter deflection is
within the ALC zone.
ALC zone
20
e SEMI and FULL break-in
Two break-in methods are provided with the TS-
140S/680S transceivers, SEMI and FULL break-in.
With either break-in operation depressing the CW
key will cause the radio to transmit without the need
for manually switching the SEND/REC switch. The
difference between FULL and SEMI break-in is that
during FULL break-in operation it is possible to listen
between dots and dashes, and that during SEMI
break-in it is not.
Note:
With either SEMI or FULL break-in operation, cross
band/cross mode operation is not possible. Addi-
tionally, when you are using FULL break-in operation
you should not work cross band splits, only in the
same band.
The TS-140S/680S also provides a_ side-tone
oscillator circuit to allow monitoring of your CW
signal during transmission.
(a)Semi-automatic break-in
Depressing the CW key will automatically place
the transceiver into the transmit mode. Transmit
mode will be maintained for a period determined
by the setting of the DELAY control on the rear
panel of the transceiver, even after the CW key is
released.
CW
OFF SEMI_FULL
bese IY agen
(b)Full-automatic break-in
Depressing the CW key will automatically place
the transceiver into the transmit mode. Releasing
the CW key will return the radio to receive im-
mediately enabling reception between characters.
Caution:
The TL-922A/922 linear amplifier is not designed
for full break-in type operation. Attempting to use
this accessory in the FULL break-in mode cause
damage to occur to the linear amplifier.
OFF_SEMI_FULL
St a
CU)
On
occasion
an
electronic
keyer
may
be
used
that
has
no
method
of
producing
a_
continuous
transmit
condition.
In
order
to
obtain
a
continuous
carrier
for
tuning
simply
place
the
standby
switch
to
the
SEND
position,
and
the
CW
switch
to
FULL.
4-3-6. Speech Processor
The Speech Processor is used when signals from
your station are weak at the distant station.
Notes:
1. Intelligibility is normally reduced when the speech
processor is used.