Kenwood TS-670 User manual

KENWOOD
TS-670
INSTRUCITON MANUAL
Thank you for buying the TS-670 amateur band
transceiver. This equipment has been carefully
engineered and manufactured to rigid quality stan-
dards and should provide satisfactory and depen-
dable operation for many years.

MISTANDARD ACCESSORIES
The following parts are supplied with TS-670 as stan-
dard accessories.
° DC power cord (E30-1648-05)
© Fuse (FO5-4022-05).............00.
° Instruction manual (B50-41 15-00)
° Warranty card (for USA)
° Microphone (option for USA) ...
MCONTENTS
a
. TROUBLESHOOTING.........
. ACCESSORIES ............0006
. INTERNAL VIEWS .............
. BLOCK DIAGRAM.............
. SPECIFICATIONS.... OANODOARWHN
SFEATURES 5c. cenisesdeceutecbessecasase
. PREPARATION BEFORE USE........
. CONTROLS, INDICATORS AND CONNECTORS
OPERATION viissiisissaccsyecxxecdscsvens
° After unpacking
© Shipping container
Save the box and packing in the event your unit
needs to be transported for remote operation,
maintenance, or service.
¢ The following explicit definitions apply in this
manual:
i
If disregarded, inconvenience only, no risk of equipment
damage or personal injury.
Equipment damage may occur, but not personal injury.
[xine

1. FEATURES
. Built-in 4 bands, 7 MHz-50 MHz:
Three HF bands, 7 MHz, 21 MHz, 28 MHz and one
VHF band, 50 MHz are provided. Band selection is ac-
complished by the UP/DOWN switch. Each band
covers 1 MHz. Operating frequency can be con-
tinuously varied by the main tuning control.
. All mode operation
Applicable to SSB, CW, FM (option) and AM (AM filter
optional) modes. The transceiver is capable of
operating in SSB, CW, FM (option) and AM (optional
AM filter).
. 500 kHz-30 MHz general coverage receiver:
With the optional GC-10, the TS-670 works as a
general coverage receiver (except for the frequencies
near 8.83 MHz).
. Various frequency control functions:
° Selectable tuning rate, 10 Hz steps or 100 Hz
steps for AM, SSB and CW, 10 kHz and 100 Hz for
FM.
° Two different VFO’s are built into the set allowing
cross-band operation.
° 80 channel memory for band-mode information.
° Pushbutton frequency entry is also possible using
the O~9 keys.
° Provided with two kinds of scanning function.
° Memory channels are selectable with the main tun-
ing control.
10.
11.
. Lithium battery memory backup.
. Built-in all mode squelch circuit.
. An IF shift circuit is provided to allow shifting the IF
passband, to aid in reducing adjacent channel in-
terference. Filter: wide/narrow selectable.
. Built-in peak power meter.
. Continuously variable TX power.
CW semi break in circuit
2-color fluorescent display tube.

==2. PREPARATION BEFORE USE
@ 2-1 PRECAUTIONS ON INSTALLATION M 2-2 PREPARATION BEFORE OPERATION
Before operating the equipment, the following preparation
is required. Before connecting the power supply, carry out
the following.
(1) First, to familiarize yourself with the operation of this
Nex OH 3h equipment, read the instruction manual thoroughly. If
SSS you are using the transceiver for the first time, practice
Avoid
direct
sunlight,
and
select
a
dry,
well
ventilated
loca-
while
reading
the
manual,
by
actually
operating
each
tion.
switch
and
control
with
the
power
switch
OFF.
After
you have mastered the transmit procedure, you may
begin actual operation.
NOTE:
Grounding
Making a good earth connection is important for preven-
Since the heat sink is on the rear panel, avoid placing the | ting dangers such as electric shock and for emitting a
equipment with the bottom and rear sides close to a wall or | high quality signal with minimum spurious radiation.
desk. Bury a commercially available ground rod or copper plate
under the ground and connect it to the GND terminal of
TS-670. A thick wire cut as short as possible, should be
used for the connection.
A city water pipe cannot be used as a good earth in
some cases.
Never use a gas pipe or electrical conduit pipe.
When installing the equipment in an automobile, ensure
adequate ventilation. Install the equipment in a location
where the rear does not make direct contact with the seat,
and is not directly exposed to vibration.
CAUTION:
Power supply
The standard operating voltage of TS-670 is 13.8 V
and the current is 4 A. Do not use a power supply (both
fixed and mobile) that provides over 16 V with the
power switch of TS-670 turned off.
Operation under such a condition will void the warranty.
7) Also, do not use a power supply that does not supply at
{
i
t \ t J
& : least 12 V in transmit or receive. Use of such a supply
may cause the performance of the TS-670 to suffer.
Avoid installing the equipment in front of the car heater air
outlet.
The
standard
operating
voltage
of
the
equipment
is
13.8
V.
Do
not
operate
below
12
V
or
over
16
V.

3. CONTROLS,
INDICATORS
AND
CONNECTORS
Meter switch
final stage power
transmission.
ampli
tion.
During SSB operation,
adjust the MIC control so that the
meter is within the ALC zone. Similarly,
adjust the CAR control for CW opera-
During
transmission,
the
meter
switch
deter-
F
mines
meter
function.
The
switch
selects
bet-
"
ween:
Meter
;
n
RF:
In
this
position,
the
meter
monitors
the
Works
as
an
S-meter
in
receive,
in-
RF output of the transceiver. dicating the signal strength, and_in-
ALC:
The
meter
monitors
the
output
of
the
dicates
the
RF
power
or
ALC
level
in
SPLIT indicator
transmit. These two modes are selected SS
Lights when the SPLIT switch is ON.
by the meter switch.
ifier during
[
VFO indicator
Indicates VFO (A or B).
POWER switch
Turns the TS-670 on (.™)
[
[
MCH (Memory Channel) display ——
Indicates memory channels (1-79) or
NB (N
and off (ML).
| Set thi
short duration pulse noise.
program scan (P).
loise Blanker) switch
is switch to ON to elimi
inate
VOICE switch
Audible announcement
of frequency when the
VS-1 is installed.
ATT (Attenuator) switch
Set this switch to ON to at-
tenuate the input by approx-
imately 20 dB.
STANDBY switch
REC: Indicates recep-
tion mode.
SEND: Indicates trans-
mission mode.
NAR/WIDE filter selector
Selects the passband width
when optional filters are install-
ed.
Connect
this terminal.
|
MIC (Microphone) connector
the microphone
to
[
PHONES jack
Connect the headphone to this jack.
MODE switch
Selects LSB, USB, CW, AM
and FM (option) modes.
Numeric keypad
Used to input numeric data for
frequency etc. See page 18 for
additional information.
|
Scan/memory
keyboard
Indicators
-
Used
to
select
memory
scan,
pro-
ONAIR
:
L
gram
scan,
VFO
or
memory
opera-
F.LOCK
:
Li
tion and for memory input. See page
18 for additional data.
F.STEP

requency display
\dicates the operating frequency to the
[
RF PWR (RF Power) control
Varies the transmit power in SSB, CW and FM modes.
RIT display
Indicates the RIT frequency with the a
earest 100 Hz.
Es ON.
This is
MIC (Microphone Gain) control
Adjust
the
microphone
gain
in
SSB
and
AM
modes.
Turn
clockwise
to
increase
the
gain.
SQUELCH control
This
is
a
squelch
adjusting
control.
Turn
clockwise
to
increase
squelch.
This
control
can
be
used
in
all
modes.
RF (RF Gain) control
This
is
used
to
adjust
the
gain
of
RF
amplifier
stages
of
the
receiver.
Normally
this
control
is
set
for
maximum
gain, full clockwise.
AF (Audio Gain) control
This is used to adjust the audio
volume. Set this control to the
desired position.
‘—IF shift control
effective for eliminating in-
terference from the near-by stations or for
adjusting the receive tone quality. |
RIT control
(mum BAND TMHz
a
al
le
28 60
[
RIT switch
This
is
the
ON/OFF
switch
of
the
RIT circuit.
This
allows
shifting
the
receive
frequency
only,
about
+1.2
kHz.
1 MHz
nected.
This
is
used
to
vary
the
frequency
in
1
MHz
steps.
This
switch
does
not
work
unless
the
GC-10
(option)
is
con-
step switch
BAND switch
/FO control
his
is
used
to
select
the
frequency.
a
lower
frequency.
This
is
the
band
selector.
Press
the
UP
button
to
switch
to
a
higher
frequency,
and
the
DOWN
button
to
his is also used for memory channel
election.
VFO keyboard
A/B __: Selects the VFO (A or B).
SPLIT
A=B
jhts in transmit.
jhts
when
the
LOCK
VEO:
vitch
is
pressed.
LOCK
a
i
hts
when
the
STEP
STEP:
Press
this
switch
to
change
the
VFO
step.
Jitch is pressed.
:
For
split
frequency
operations
A-R,
B-T
or
B-R,
A-T.
:
During
VFO
operation,
press
this
switch
to
equalize
the
frequency
and
mode
of
the
idle
VFO
to
that
of
the
active
:
Press
this
switch
to
lock
the
VFO
and
BAND
switches.

ANT (Antenna) switch
Used to select either the 7-50 MHz or
the 50 MHz connector.
7-50 MHz antenna connector
KEY jack
Connect a key to this jack when
operating in CW mode.
For connecting a single 7-50 MHz
antenna. May also be used for a
7-28 MHz antenna with the proper set-
ting of the ANT switch.
Used for connection of a seperate
50 MHz antenna.
EXT SP (External Speaker) jack ——
An external speaker terminal. Use the
50 MHz antenna oro» oe |
supplied plug when connecting an ex-
ternal speaker.
GND terminal
REMOTE
connector
_
DC
power
connector
The TS-670 should be grounded
through this terminal to avoid the
possibility of TVI and BCI.
Use this connector when the TS-670 is
operated in conjunction with an exter-
nal device. This connector is internally
connected as shown in the illustration.
For connection use the supplied 7P DIN
plug.
Connect a DC power supply to this con-
nector using the supplied power cord.
The standard voltage is 13.8 V. Pay at-
tention to polarities.
1
Rear view u GND External control (+12
Saget V DC at max. 10mA GND
7 6 5) S— yey” terminal appears in transmis-
sion.)
‘Standby terminal (For
transmission, this ter-
minal should be ground-
ed.)
External ALC
input
Speaker output
+8Vvpc GND

4. OPERATION
@ 4-1 Connection
Make connection of TS-670 as shown below.
Headphones
Use headphones of 4 to 162 impedance.
Stereo-type headphones can also be used.
on 8
Voice controller VOX-4 REMOTE commectot
Connect
the
VOX-4
output
cable
to
the
External
accessories
can
be
connected
to
the
MIC
connector
of
TS-670,
if
desired.
TS-670
through
the
REMOTE
connector.
The
PTT
terminal
can
be
used
for
remote
control
of
send/receive
operations.
a=
GND terminal External speaker
It is recommended that a ground lead be con- Key Besides the built-in speaker, an external
nected to the GND terminal at the rear of the For CW operation, connect your key to the speaker can also be used. Connect to the rear
set
to
prevent
the
possibility
of
electric
KEY
jack
at
the
rear.
Use
shielded
cable.
EXT
SP
jack
using
the
supplied
plug.
shock, TVI and BCI. Use as short and heavy a
lead as possible.
@
4-2
CONNECTION
OF
ANTENNA
AND
POWER
SUPPLY
FOR
FIXED
STATION
When
the
7-50
MHz
common
antenna
is
used,
set
the
switch
to
the
7-50
position and use the upper connector. When separate antennas are used,
50
MHz
band
HF
band
_
set
the
switch
to
the
50/7-28
position
and
connect
the
50
MHz
antenna
to
antenna
antenna
the
lower
connector
and
the
7-28
MHz
antenna
to the
upper
connector.
PS-20
Se
ms
iy
ms
Regulated
power
supply
728 mes
50
a
Wall AC outlet
Black © | @ Red
M-type connector
—_>
—
M-type connector
DC power terminal

@ 4-3 CONNECTION OF MOBILE ANTENNA AND POWER SUPPLY
ANT When a 7-50 MHz common antenna is used, set the switch to the 7-50
somo
position and use the upper connector. When separate antennas are used,
728 7-50 set the switch to the 50/7-28 position and connect the 50 MHz antenna to
the lower connector and the 7-28 MHz antenna to the upper connector.
50
M-type connector
—,,> >
—ZJ> =
M-type conector
Take power directly from
the battery terminal.
Battery (12 V)
Mobile operation
NOTE:
Before connecting and disconnecting the power connec-
tor, be sure to turn off the power switches of the
TS-670 and the PS-20.

@ 4-4 RECEPTION
Power switch OFF
(1)
Turn the SQUELCH
ntrol fully counter-
clockwise.
Turn the RF control
fully clockwise.
Turn the AF control ful-
ly counterclockwise.
REC RIT switch OFF
(2)
(3)
MODE switch BAND switch
(4)
(5)
90000
oooo0
=
———
VFO control
First connect the antenna, microphone and key.
Preset the controls as shown at the left.
Turn the POWER switch on. (First turn on the power
switch of PS-20 and then, the POWER switch of
TS-670 when operating fixed station.)
The meter and digital display will illuminate, indicating
the transceiver is in operation.
Select the desired band with the BAND switch (UP or
DOWN).
Select the desired mode. (In SSB, LSB for 7 MHz or
lower and USB for over 10 MHz is commonly used by
international convention.)
(6) Adjust the AF control to obtain the desired volume.
(7) Turn the VFO control slowly so the desired signal can
be heard clearly.
NOTES:
1. A weak beat will be heard at 53.9999 MHz. This is
normal and is not an indication of trouble.
2. In AM mode without the YK-88A filter (option), the
passband is the same as in SSB mode.

(1) How to use the RF ATT switch
Se
m=
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RF attenuater
(2) How to use the RF control
RF control
AF GAIN—®— RF GAIN
3 5 79 20 40 60 §
jth
0
S-meter reading at
partial counter- oy
Signals below clockwise position Position.
this level Pos} fit RF GAIN control
attenuated AF GAIN -@)— RF GAIN
Turn
counter-
clockwise
Full Clockwise
RF GAIN Control Operation
(3) How to use NB switch
NB switch
A
—jo0000 fo
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}eoosl|o
Sso|e
RF ATT SWITCH
When this switch is turned on the input to the receive RF
amplifier is attenuated approximately 20 dB, providing
distortion-free reception. This feature may be used in cases
of receiver overload, caused either by a strong local signal,
or during weak signal reception when a strong adjacent
signal may blank the receiver.
RF GAIN CONTROL
For normal operation, this control should be turned fully
clockwise for maximum sensitivity. Receive sensitivity is
reduced by turning the control counterclockwise.
Adjust the RF GAIN so the S-meter does not show ex-
cessive deflection. This minimizes noise during reception
and allows the S-meter to indicates signal peak (or a little
below that point). Noise is markedly reduced when signals
are absent.
NB SWITCH
The TS-670 has a sophisticated noise blanker designed to
reduce ignition-type pulse noise. The noise blanker is par-
ticularly important for mobile operation. When necessary,
activate the noise-blanker by depressing the NB switch to
ON.
SQUELCH
To eliminate receiver noise during no-signal periods, slowly
advance the squelch clockwise until the noise just disap-
pears (threshold point).
The squelch will open and the speaker will operate when a
signal is received. If the signal is weak or fades, readjust
the squelch for consistent reception.
NOTE:
Squelch operation is possible in all (FM, SSB, CW and
AM) modes, but the threshold point differs a little in
each mode. Operation of the squelch circuit also varies
depending on the external noise strength.

(5) How to use the RIT control
RIT control
RIT control
(6) How to use the IF SHIFT control
IF SHIFT control
i] —
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Oe) ss=o
Turned in © direction
IF filter passband
es
marks
aad)
Turned in ® direction
®
~—
Interfering signal
Interfering signal
RIT—®- IF SHIFT RIT—®-IF SHIFT RIT-@- IF SHIFT
0. 0
c) ® oO ® oO @
Turn in © direction to
eliminate interference
from signal ®
Turn in @ direction to
eliminate interference
from signal ®
IF SHIFT Control
10
RIT CONTROL
By using the RIT (Receiver Incremental Tuning) control, the
receive frequency can be shifted approximately +1 kHz
without changing the transmit frequency.
If the frequency of the station you are working changes,
your receiver frequency can be reset by turning the RIT
switch ON, and adjusting the RIT control. Adjusting the
control clockwise increases the frequency.
NOTE:
When first calling another station, the RIT should be
OFF, otherwise your transmit and receive frequency will
not coincide.
IF SHIFT CONTROL
The
IF
SHIFT
control
is
used
to
shift
the
passband
of
the
IF
filter
without
changing
receive
frequency.
By
turning
this
control
in
either
direction,
the
IF
passband
is
shifted
as
shown
in
the
figure
at
left.
The
IF
SHIFT
is
effective
in
eliminating
interference
when
nearby
signals
are
superimposed
on
the
receive
signal
dur-
ing
either
SSB
or
CW
operation.
IF
SHIFT
does
not
Operate
in
the
AM
or
FM
modes.
°
USB
Mode
(21
MHz,
28
MHz
and
50
MHz
bands)
Adjust
the
IF
SHIFT
control
in
the
+
direction
and
lower
frequencies
are
cut.
Adjust
the
control
in
the
—
direction
and
high
frequencies
are
cut.
¢ LSB Mode (7 MHz and below)
Adjust
the
control
in
the
+
direction
and
higher
frequen-
cies
are
cut.
Adjust
the
control
in
the
—
direction
and
low
frequencies
are
cut.
° CW Mode
By
using
the
IF
SHIFT
in
conjunction
with
the
RIT,
tone
quality can be adjusted.

Hightcut signal }———————-Lowcut signal
Lowcut signal —————— ————————-Hightcut signal
(7) NAR-WIDE switch
NAR/WIDE switch
For short to medium distance communication, the WIDE
position may be used for CW operation. For DX (long
distance) communication, the NAR position will be an ad-
vantage in reducing interference.
This feature, in combination with the IF SHIFT control, will
provide outstanding interference rejection. The receive IF
bandwidth is 2.5 kHz in the SSB and CW wide position,
270 or 500 Hz for CW (with optional filters YK-88CN or
YK-88C) in the NAR position.
*In the AM MODE without an optional filter, both WIDE
NARROW positions are 2.5 kHz. With a YK-88A, Wide is
6 kHz, and Narrow is 2.5 kHz.
*In transmit bandwidth is automatically WIDE.
PASSBAND WIDTH (-—6 dB) kHz
FILTER
No optional filter
YK-88C or CN
YK-88A
NOTES:
1. In SSB, no reception is a result when the NAR/WIDE
switch is set to NAR.
2. Without optional filters, there is no CW reception in
the NAR switch position (*).
3. The NAR/WIDE switch does not function in the FM
mode.
11

@ 4-5 TRANSMISSION
(1) SSB mode
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Sela g|o00/0
LSB USB
Meter switch RF PWR control
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000
Go
(2) CW mode
Peak should not exceed the ALC zone.
ALC range
810 1520
w
Meter switch
== j
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12
(1) Set the MODE switch to LSB or USB.
LSB for 7 MHz or lower and USB for 10 MHz or over
by international convention.
(2) Set the meter switch to ALC.
(3) Turn the RF PWR control fully clockwise.
(4) Press the PTT switch of the microphone, or set the
standby switch to SEND.
(5)
Speak
into
the
microphone.
Adjust
the
MIC
gain
con-
trol
for
an
‘‘ON-SCALE”’
meter
reading
on
voice
peaks.
NOTE:
The RF meter pointer deflection may be small with some
types of antenna. Therefore, monitoring the ALC
reading during transmit operation will be effective. If the
MIC
gain
is
set
past
the
ALC
zone,
it
may
cause
distorted transmit audio.
An RF power control is provided with this transceiver for
controlling the transmit power output.
Turning the RF PWR control counter clockwise reduces
transmit power. This is useful for local QSO’s.
Set
the
MODE
switch
to
CW,
and
the
meter
switch
to
ALC.

Standby, switch Set the standby switch to SEND, and press the key.
Transmission is also possible by pressing the key with the
standby switch set to REC. (Semi-break-in operation)
RF PWR control
'
Adjust the RF PWR control so that the meter pointer
deflects to about half of the ALC zone.
E
aoe =
ee
Pd
\
* By turing this control, the
time required for changing
from transmit to receive
after the key is released
can be adjusted.
Turning this control clock-
wise prolongs the time,
and turning it counter-
clockwise shortens it.
TS-670 Bottom panel
A side tone oscillator is provided in TS-670, permitting monitoring
of your CW signal.
(3) AM mode
Select the desired frequency.
Set the MODE switch to AM.
Set the meter switch to RF.
13

Standby switch
RF PWR control
(2)
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a
a
c=)
a
Meter switch MIC gain control
ice —
foo
(cose?
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(4) FM mode (With FM-430 installed)
Meter switch
of o| .
conoa|8("~") 2
Oolea=s\ J
ry FM mod: Band switch
Standby switch
(Oe)
Qo
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RF PWR control
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14
Press the PTT switch of the microphone, or set the standby
switch to SEND. Adjust the RF PWR control so that the
meter pointer deflects to 4 W.
NOTE:
While the protection circuit is activating due to poor
antenna VSWR, turning the RF PWR control to the max-
imum may not provide 10 W meter reading. In such a
case, check the antenna VSWR. If it is poor, correct
before transmitting.
Speak into the microphone and adjust the MIC gain control
so that the RF PWR meter reading does not exceed 8 W at
voice peaks.
Set
the
MODE
switch
to
FM,
and
the
meter
switch
to
RF.
Press
the
PTT
switch
of
the
microphone,
or
set
the
standby
switch
to
SEND.
NOTE:
In
FM
mode,
the
MIC
control
is
not
used.
The
RF
power
control
is
provided
on
the
TS-670
to
change
the
transmit
power.
The
transmit
power
can
be
lowered
by
turning
the
RF
PWR
control
counterclockwise.
This
feature
is
effective
for
local
communications.

The RF power control works only in SSB, CW and FM
modes.
NOTES:
1. Before transmitting, be sure to connect an antenna
with a low SWR. The TS-670 is provided with a final
protection circuit to protect the final stage.
2. However, if the antenna terminal is open, a failure
may occur. So never transmit without an antenna.
3. The RF PWR meter does not indicate correctly when
the antenna VSWR is poor.
Keep the VSWR as close to 1:1 as possible.
@ 4-6 HOW TO USE BAND (UP/DOWN)
-
-
1.
When
the
GC-10
general
coverage
unit
(option)
is
not
oool\
1
:
O)
connected.
q 1M > el (1 MHz step switch OFF)
= 2 - 7MHz
ms
Band switch SOMHz 21MHz
DOWN
direction
PRS
Pa
UP
direction
28MHz
2.
When
the
GC-10
general
coverage
unit
(option)
is
con-
nected.
7MHz
SOMHz 21MHz
DOWN
direction
=...
_—s
up
direction
28MHz
Works in this way.
(The
1
MHz
step
switch
does
not
work.)
(1 MHz step switch ON)
DOWN
:
0.5MHz
UP
direction
ue
a
iP
Changes
in
aah
|.BMHz
direction
1
MHz
steps.
50.5MHz
at
}
29.5MHz
-- NOTES:(GC-10 unit is mounted)
1. When the DOWN switch is pressed with the VFO set
to 1.000 MHz-1.4999 MHz, the VFO changes to
500 kHz.
2 When the DOWN switch is pressed with the VFO set
to 999.9 kHz or lower, the VFO changes to 53 MHz.
15

@ 4-7 DUAL VFO OPERATION
(1) How to use the [A/B
switch
A-VFO or B-VFO is displayed.
©oO
©)
oj0
A/B switch
(2) How to use the |SPLIT} switch
SPLIT switch
16
LOCK switch
VFO frequency steps
STEP switch | SSB, CW-AM
STEP switch
OFF 10 Hz
ON 100 Hz
When the switch is pressed, VFO°A or B will be
displayed, indicating which VFO is operating.
When receiving on VFO.A pressing the [SPLIT|switch will
cause the transmit frequency to be on VFO-:B. When
receiving on VFO:B and pressing the [SPLIT] switch, the
transmit frequency will be on VFO-A.
By pressing the B} switch, the frequency and mode of
the idle VFO are equalized with those of the operating VFO.
For example:
When VFO-A is 7 MHz LSB and VFO-B 21 MHz USB,
pressing will change VFO-B to 7 MHz LSB.
When the[LOCK] switch is pressed, the F.LOCK indicator
lights on the display and the VFO and BAND switches (MIC
UP/DOWN) are locked. This is useful for mobile operation.
The RIT control is still active.
When the switch is pressed, the |STEP| indicator
lights on the display and the VFO step frequency is chang-
ed. See chart at left for step size explanation.
¢ In SSB and CW modes, turn this switch on only for
rapid frequency changes.
¢ In AM mode, tuning is easier with this switch ON.
¢ In FM mode tuning is in 100 Hz steps with the STEP
switch ‘‘ON’’, and 10 kHz steps with the switch
“OFF”.

@ 4-8 CW OPERATION
° When the YK-88C/CN filter (option) is not inserted:
IF SHIFT control
RIT switch
RIT control
RIT switch
° When the YK-88C/CN filter (option) is inserted:
IF SHIFT control
oogoo
=16
RIT switch
° When the key is connected:
For CW operation, your transmit frequency should be
“‘zero-beat’’ to the transmit frequency of the station you
are contacting. This also allows your contact to receive
your signal without having to retune his receiver. Tuning
methods are detailed in the following paragraphs.
Your frequency Displayed frequency
Transmit-Receive frequency
Receiver carrier frequency
a (Displayed frequency)
(BFO)
|
=o
800 Hz
Beat note
Tuning for CW Operation
NOTE:
In CW mode, transmit frequency is displayed when both
transmitting or receiving.
Set the IF SHIFT control to its center position and the RIT
switch OFF. Adjust the main tuning control for an 800-Hz
beat note and your transmit frequency will then coincide
with that of your contact station (’’zero-beat’’).
You may now adjust the RIT for a pitch which suits your
preference.
If
interference
is
encountered,
adjust
the
IF
SHIFT. For more convenient and effective CW operation,
use
of
the
optional
YK-88C
or
YK-88CN
CW
crystal
filter
is
recommended.
Set the IF SHIFT to its center position and the RIT to OFF.
Adjust the main tuning control for maximum deflection of
the S-meter. Receive signal pitch will be about 800 Hz, in-
dicating correct tuning.
NOTE:
Rear panel of TS-670
Connection to the key plug
+8V
GND
TS-670 Before connecting, check that the
polarity is correct. The KEY jack pro-
vides +8 V. Use shielded cable.
When using an electronic keyer, make sure that polarity
is set for positive. Always use shielded line from the key
to transceiver.
17

@ 4-9 MEMORY CHANNEL OPERATION
The memory is used to store frequently used frequencies
and specific frequencies. There are 80 channels in the
memory. It is convenient to store data by considering 10
channels as one group. For example, channels 10 — 19
are for 7 MHz band LSB, channels 50 — 59 for 50 MHz
(1) Memory input
Use the [MIN] (Memory IN) switch.
MEMORY
at le ee
i rcs =
a a a ee
(2) Memory recall
2-1 When using the |VFO/M] (VFO/Memory) switch
Operation will be similar to that of a fixed channel. RIT is
still possible.
MEMORY
—rGs—1
2-2 Memory recall using the keypad
18
band
USB,
channels
60
—
69
for
50
MHz
band
FM,
and
channels
70
—
79
for
short
wave
broadcasting.
As
memory
scan
can
be
designated
for
each
group,
this
way
of
sorting
the
channels
is
easy
to
identify
and
convenient
for
memory
scanning.
(1) Select the frequency to be stored using the VFO con-
trol or the key.
For operation of the key, refer to 4-9-3 keyboard.
Frequency entry on the following page.
(2) Press and hold the [MIN] switch.
(3) Select the desired channel (0 — 79) using the keypad.
(4) The designated channel numbers are displayed in the
([MCH] display, the mode and displayed frequency are
entered into memory.
(5) Release the [MIN] switch.
NOTE:
To designate a 2-digit channel, press the 1st digit
number key and then, press the 2nd digit number key.
(1) Set the |VFO/M]| switch to ON.
(2) M.CH number will be displayed.
(3)
Select
the
desired
channel
(0
—
79)
using
the
keypad.
The
stored
channels
can
also
be
selected
by
the
main
dial.
One
full
turn
of
the
main
dial
is
equivalent
to
15
channels.
(4)
Pressing
the
switch
again
restores
operation
to
the
VFO.
(1) To select the desired memory channel (0 — 79) while
in
the
VFO
A
or
the
VFO
B
mode,
press
the
desired
channel number using the keypad.
(2) The {MCH] channel number will be momentarily
displayed
and
the
display
will
indicate
the
frequency
that was stored in that channel. The main tuning dial
and the RIT will still be functional.
NOTE:
The
frequency
that
was
displayed
prior
to
keypad
recall
will be erased from the display.
The
contents
of
the
memory
channel
will
not
be
erased.