Kenwood TS-440S User manual

GOO/ANAD
HF TRANSCEIVER
TS-4405
INSTRUCTION MANUAL
KENWOOD CORPORATION

Thank you for purchasing the new TS-440S tran-
sceiver. Please read this instruction manual carefully
before placing your transceiver in service. This unit has
been carefully engineered and manufactured to rigid
quality standards, and should give you satisfactory and
dependable operation for many years.
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.
1. This Instruction Manual covers the TS-440S,
with and without AT (Automatic Antenna
Tuner) unit. When there are differences in
operation, separate instructions will be given
for each model. Illustrations show the
TS-440S with AT unit.
. In the U.K, the TS-440S is available under the
brand name ‘TRIO’. The TS-440S with
KENWOOD brand appearing in this instruction
manual is not sold in the U.K., as they are
made to a different market specification.
N
CONTENTS
1, FEATURES....
2. INSTALLATION
2-1. PRECAUTIONS
2-2, FIXED STATION
2-1, interconnection
-2-2. Grounding .
2
2
-2-3. Antenna.
'-2-4, Key connection
2-3. MOBILE.
2-3-1. Mounting bracket installation
2-3-2, Power supply connection
3. OPERATIOW.........
3-1. OPERATING CONTROLS
3-1-1, Front panel
3-1-2. Rear panel.
3-1-3. Top cove
3-2, RECEIVE...
3-2-1. tnitial setting.
3-2-2. CW zero-beat operation.
3-2-3, Direct keyboard frequency.
3-2-4, AM reception
TRANSMIT .
. SSB (LSB, USB) mode
OOOANTTTGAR RAR W
(a) Semi-automatic breal
(b) Full-automatic break-in
in.
3-4, AUTOMATIC ANTENNA TUNER
3-5. DUAL DIGITAL VFO’s
{c} SPLIT switch
(d) T-F SET switch.
3-6. MEMORY .
3-6-1. Memory entry .
3-6-2. Transferring memory information to the
VFO
3-6-3. Transferring data between memory
channels
3-6-4. Entering/Transferring data in the split
frequency channels...
3-6-5. Clearing a memory channe'
3-6-6. Memory recall.
3-7. SCAN........
3-7-1, Memory scan
3-7-2, Program scan
3-7-3. Scan speed...
3-7-4. Memory channel lockout.
3-8. -AFSK....
3-8-1. Reception.
3-8-2. Transmit
3-8-3. AMTOR operation
3-9. OPERATION WITH A LINEAR AMPLIFIER.. 19
2
4. CIRCUIT DESCRIPTION ...
4-1, GENERAL DESCRIPTION
4-2, TRANSMITTER SECTION
4-3, RECEIVER SECTION...
. RF unit (X44-1680-00)
IF unit (X60-1300-00)..
Controt unit (X53-1450.
PLL unit (X50-2050-00) .
. AT (Automatic Antenna Tuner) unit
{X67-1150-00)
5. MAINTENANCE AND ADJUSTMENT.
5-1, GENERAL INFORMATION
-2. SERVICE ...
3. CLEANING.
-4. IN CASE OF DIFFICULTY
5. MICROPROCESSOR BACK-I
LITHIUM BATTERY
. MICROPROCESSOR RESET
. ORDERING SPARE PARTS .
. ADJUSTMENTS
1. Cover removal.
Internal views .
Digital display calibration ..
Optional 10 Hz display resolution
CW zero beat frequency selection ..
Side tone level
Beep tone selectiol
Beep tone level ..
Tuning dial torqui
-8-10. Linear amplifier control ..
6. OPTIONAL ACCESSORIES
6-1. CRYSTAL FILTER INSTALLATION ......... 27
6-2. VOICE SYNTHESIZER UNIT VS-1
INSTALLATION
6-3. INTERFACE IC KIT IC-10
INSTALLATION .......
OTHER ACCESSORIES
6-4.
9. SPECIFICATIONS AND ACCESSORIES .
9-1, SPECIFICATIONS
9-2. ACCESSORIES
10. REFERENCE .....
10-4. ANTENNA INSTALLATION .
» Fixed station
10-2. MOBILE OPERATION .
10-2-1, installation ......
10-2-2, Noise reduction .
10-2-3. Battery capacity 4!
10-3. RADIO FREQUENCY ALLOCATION...... 46

1. FEATURES
1. Wide dynamic range
New advances in circuit design have made a 102 dB
dynamic range {500 Hz IF bandwidth) possible.
2. General coverage reception from 100 kHz
to 30 MHz
In addition to transmission and reception on all amateur
bands from 1.8'to 28 MHz, the TS-440S provides a
continuous tuning general coverage receiver with a
range of 100 kHz to 30 MHz.
3. Automatic antenna tuner
The optional, built-in automatic antenna tuner will oper-
ate from 3.5 to 28 MHz.
4. All-mode operation
USB, LSB, CW, AM, FM, and AFSK modes are
provided.
5. 100% continuous duty transmit
Transmission at a 100% duty cycle is possible for rela-
tively long durations (one hour or less) in any mode,
including FM and AFSK.
6. CW full break-in
Full break-in operation is possibie in the CW mode.
Rapid transmit/receive switching also makes the radio
suitable for data communications in the SSB mode,
such as AMTOR.
7. Build-in XIT
XIT (Transmitter incremental tuning) allows fine tun-
ing of the transmitter frequency.
8. Switchable IF bandwidth
The IF bandswitch allows you to tailor the receiver
bandwidth to the operating conditions. Several selec-
tions are provided; AUTO, W (Wide), M1 (Medium 1),
M2 (Medium 2) and N (Narrow). When the AUTO po-
sition has been selected the radio will select the opti-
mum bandwidth for the selected mode of operation.
9. Switchable AGC time constant
A switch is provided to select either FAST or SLOW
AGC action.
10. All mode squelch
11. Built-in RF power/SWR meter
12. Versatile frequency control
Accurate frequency selection is possible due to the
use of a single reference oscillator circuit.
Continuous tuning of all frequencies thru the use of
digital VFO technology. The basic 10 Hz step tun-
ing rate is modified, according to the selected mode,
for optimum tuning speed and accuracy. An auto-
Matic fast scan function is also provided.
Dual, digital VFO‘s (A/B) enable crossband, cross
mode operation.
400-channel memory {including 10 odd-split chan-
nels} stores the frequency, band, and mode.
Memory scan and two programmable scan ranges,
Direct entry of the desired frequency using the front
panel numeric keypad is also possible.
A memory scroll function allows review of the
memory channel contents.
Selection of the desired memory channel is possi-
ble using either the TUNING dial or microphone
UP/DOWN pushbuttons.
The T-F SET function is useful for split frequency
operation.
An optional tone unit TU-8 may be used in conjunc-
tion with the oda-split memory channels to allow 10:
meter repeater operations with CTCSS access.
Optional computer interface.
Built-in long-life memory back-up battery.
2-color fluorescent display tube indicates frequen-
ey and other operational data.
ae
13. Front panel control of the TUNING dial
torque is provided.

2. INSTALLATION
2-1. PRECAUTION
. Avoid direct sunlight, and select a dry, well venti-
lated location.
Since the heat sink is on the rear panel, avoid piac-
ing the equipment with the bottom and rear sides
close to a wall or desk.
. When installing the equipment in an automabile, en-
sure adequate ventilation, Install the equipment in
N
@
2-2. FIXED STATION
2-2-1. Interconnection
The TS-440S requires more than 18A at 13.8 VDC
when transmitting at full power. Use the PS-50 or
PS-430 power supply for fixed stations.
Note: ;
The PS-50 base station supply is needed for continu-
ous transmission operation.
PS-50 —_ >
TS-4408
To antenna
2-2-2. 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.
. A city water pipe cannot be used as a good earth
in some cases,
N
a location where the rear does not make direct con-
tact with the seat, and is not directly exposed to
vibration.
4. Avoid installing the equipment in front of the car
heater air outlet.
5. The standard operating voltage of the equipment
is 13.8 V. Do not operate below 12 V or over 16V.
The transceiver can be elevated for operating con-
venience.
Caution:
Do not use the bail to carry the transceiver.
Making a good earth connection is important for
preventing dangers such as electric shock and for emit-
ting a high quality signal with minimum spurious radi-
ation. Bury a commercially available ground rod or
copper plate under the ground and connect it to the
GND terminal of the TS-440S. A thick wire, cut as
short as possible, should be used for the connection.
To make a good earth connection, connect the GND
terminal to a grounded metal water pipe.
4

2-2-3. Antenna
2-3-2. Power supply connection
Cauti
Cautioi
Protect your equipment—Use a LIGHTNING AR-
RESTOR.
Any of the common antenna systems designed for use
on the high frequency amateur bands may be used with
the TS-440S provided the input impedance of the
transmission line is not outside the capability of the Au-
tomatic Antenna Tuner. The transmission line should
be coaxial cable. An antenna system which shows a
SWR (Standing Wave Ratio) of less than 1.5: 1 when
using 50 ohm coaxial transmission line, or a system
that results in a transmission line input impedance that
is essentially resistive, and between 20 and 150 ohms
will take power from the transceiver through the AT
unit.
2-2-4. 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 pasitive. Always use shieid-
ed line from the key to transceiver.
Before connecting; check that the
potarity is correct. The KEY jack
provides +5.5V. Use shielded
cable.
+65V To key
a >
<|4—
GND
Key connection
2-3. MOBILE
Being compact in design, this transceiver is ideal for
mobile operation. Satisfactory mobile operation is
achieved through proper power and antenna connec-
tion, and thoughtful transceiver installation and ad-
justment.
2-3-1. .Mounting bracket installation
Secure the TS-440S under the dashboard using an op-
tional MB-430 mounting bracket. As an alternative, use
strapping, making sure that the TS-440S will not slip
out of place while operating the vehicle.
Notes:
1. Do not install the TS-440S near the heater outiet.
2. Allow sufficient space behind the TS-440S to en-
sure proper ventilation.
KENW-01848 / DRUCK 1
. Turn POWER switch OFF before connecting/dis-
connecting the power cable.
. Observe battery polarity.
N
DC power cable
Red and white +
Black and gray —
wo
. When charging your vehicle battery, or when jump-
starting a dead battery, ALWAYS disconnect the
power cable fram the back of the transceiver, or
damage may result ta the transceiver.
Connect the TS-440S power cable to the battery ter-
minals, with ion to current fi and
noise prevention. The maximum current drawn by the
TS-440S reaches between 18 and 20A when trans-
mitting. Therefore, the cable should be made as short
as possible, using the specified fuse. Also, canfirm that
the power system of the car {including the battery and
generator or alternator) will handle the increased load
of the TS-4408.
Use fuse block battery acc-
12V Battery
Fuse should be as close to the battery
ibi
terminal as possible.
essary position. 20A mini-
mum rating.
hort as possible, TS-440S

3. OPERATION
3-1. OPERATING CONTROLS
3-1-1. Front panel °
POWER.
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[HE TRANSCEIVER,
JSEND AUTO AT TUNE}
KENWOOD) .
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F.Lock PROC NoTCH éMST
auto,
AGC SELECTIVITY
@ POWER switch
Press to turn the power ON or OFF.
@ 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,
PWR. (power) or SWR readings.
@ MODE/KEY (Numeric Keypad)
These keys are used to select the desired mode of oper-
ation (USB, LSB, CW, AM, FM, AFSK}. When program-
ming a memory channel or directly entering a frequency
these keys are used as a numeric keypad to enter the
channel number or frequency.
@ Indicators
AT TUNE: Lights when the AT TUNE switch is ON.
Turns itself OFF when the antenna tuner
has completed tuning.
NOTCH: Lights when the NOTCH switch is ON.
F,LOCK: Lights when the F.LOCK switch is ON.
1 Miz: Lights when the 1 MHz step switch is ON.
M.SCR: Lights when the M.IN switch is pressed.
When the memory scroll function is active
you can review the contents of the
memory channels without a break: in the
reception of the station you are listening
to.
ON AIR: Lights during transmit.
6
KENW-01848 / DRUCK 2
v2)
@) Frequency display
The operating frequency is displayed down to the
nearest 100 Hz. Also displays the memory channel
number, RIT/XIT frequency, and includes indicators for
memory, VFO A/B, scan, split and RIT/XIT operations.
© FUNCTION switches
The switches included in this group are-the RIT/XIT,
T-F SET switch, and the VFO select switches. (See
page 15.)
@ MIC gain control
Microphone gain can be adjusted during USB, LSB,
AFSK and AM operations. Gain is increased thru clock-
wise rotation of this control.
CAR (Carrier level} control
This control sets the carrier level during CW, FM and
AM operations. When transmitting in the CW mode,
adjust so that the ALC meter pointer is within the ALC
zone.
@ SOL (Squelch) control
This function operates in all modes, FM, USB, LSB,
CW, AFSK, and AM.
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 am-
bient noise just disapears, and speaker shuts off. This
point is known as the squelch threshold point. Now you
will only hear output from the speaker when an incom-
ming signal is present. For weak signal reception this
control should be fully counterclockwise.
Note:
The squelch threshold position will vary from mode to
mode, so you may have to readjust when you change
modes.
(® NOTCH control
The NOTCH function is used to reduce or eliminate het-
erodyne, or CW type signals. The NOTCH filter will not
be effective against SSB, AM or FM type signals. To
use the control, place the NOTCH switch ON and slow-
ly rotate the NOTCH control to reduce the interference.
Normally the notch point will occur between the 11:00
and 1:00 o’clock position.
Notes:
1. The NOTCH frequency can be varied within a range
of approximately 400 to 2600 Hz.
2. When an interfering signal such as a CW station
appears, slowly rotate the NOTCH control. If you
rotate the knob too quickly you may pass right over
the notch point. Slow rotation will yield the best
results.
; aye iiterfering Receive
interfering
Recel
©
signal
attenuated
—
signal
ig signal by NOTCH control
Audio output Audio output
(NOTCH OFF) (NOTCH ON}
NOTCH control
@) IF SHIFT control
Note:
The IF SHIFT contro! does not function in the AM or
FM modes.
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. As the
accompanying illustration shows rotating this control
may place the interfering signal outside the receiver
passband, allowing for easier copy. The operation of
this control in the USB, LSB, AFSK, and CW modes
is detailed below.
° 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 fre-
quencies to have a slightly treble response, i.e.low
cut filter (ow frequencies attenuated). Interference
from higher frequencies can be reduced or eliminat-
ed by rotating the IF SHIFT control in the © direc-
tion. This will cause the resulting audio frequencies
to sound a little bassy, i.e.high cut filter (high fre-
quencies attenuated).
LSB/AFSK mode
Interference from lower frequencies can be reduced
or eliminated by rotating the IF SHIFT controt in the
@ direction. This will cause the resulting audio fre-
quencies 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 ap-
pear a little on the high side, again just the opposite
of the USB mode.
CW mode
The operation of the IF SHIFT control is simitar to
that for USB with the exception that you can con-
trol the tone of the CW note by using the RIT
control.
Turned jn @direction
- IF filter passband
characteristic
®
° ISignal
Signal Signal
0
o —
Interfering signal Interfering signal
Turned in @direction
| RIT/XIT@1F-SHIFT- RIT/XIT—@ IF SHIFT RIT/XIT=@™1F SHIFT |
0° 0:
@E@
Turn in ©direction
to eliminate inter-
ference from signal
Tum in @direction
to eliminate inter-
ference from signal
IF SHIFT operation
@ RIT/XIT control
« 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 contro! function.
This contro allows shifting the receive frequency
without shifting the transmit frequency. The RIT
control allows you to shift the receiver frequency
+/— 1.2 kHz. This control is also useful for pileups
when the DX station is transmitting a little above
or below his receive frequency.
Notes:
1. 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.
2. The figure at the right illustrates that the RIT dis-
play and the VFO display may not agree exactly in
ail 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 associat-
ed display may not update immediately. You will
have to tune 100 Hz to see the display actually
change.
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XIT control
When the RIT/XIT control is rotated with the XIT
switch depressed the transmit frequency can be
varied +/— 1.2 kHz without affecting the receiver
frequency.
Pressing the switch again releases the XIT function.
@® 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 in the full clockwise position. If
you are having trouble copying the desired signal make
anote of the stations peak S-meter reading. Then, ad-
just the RF control counterclockwise, 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 the completion of
the OSO easier.
If the incoming signal pegs the S-meter you can also
reduce the receiver gain by counterclockwise rotation
of the RF control. The S-meter pointer will always ad-
vance up-scale as the RF control is rotated counter-
clockwise, as a visual reminder that the gain of the
radio has been reduced.
(@ AF gain control
Tum the inside knob to increase or decrease the
volume.
@} SELECTIVITY switch
When an optional filter is instalied, the radio’s pass-
band can be switched to one of four different band-
widths.
The switch has five positions; AUTO, N, M1, M2 and
W, that are used to select the bandwidth. The M1, and
N positions are not active until the optional filters are
installed, see the accompanying chart. This switch
should normally be set to the AUTO position. The IF
bandwidth will then be selected for optimum receiver
characteristics, according to the MODE that has been
selected. Manual override is possible by simple rota-
tion of the SELECTIVITY control.
7

The table in section 6-1, CRYSTAL FILTER INSTAL-
LATION on page 27 shows the bandwidth of each
switch setting. Note the differences when the option-
al filters are installed. The YK-88C is used in the ‘‘N’
position and the YK-88SN in the “’M1” position.
Notes:
. During transmit the wide filter position is selected
regardless of the position of the SELECTIVITY
switch.
.. When in the FM mode the bandwidth is always 15
kHz, regardless of the position of the SELECTIVI-
TY switch,
. When the SELECTIVITY switch is set to N or M1,
and no optional filters have been installed, there will
be no sound from the speaker. Refer to the option-
al filter installation procedure in the rear of this
manual for information on installation of these
options.
N
wo
@® AGC switch
This switch selects the operating time constant of the
AGC (Automatic Gain Control) circuit during receive.
When the AGC switch is set to SLOW, the receiver
gain and S-meter readings will react slowly to large in-
put changes, and when set to FAST, the receiver gain
and S-meter will react quickly to changes in the input
signal level.
The narmai position when using all modes is the SLOW
position. When working weak signals, or high speed
CW you might wish to use the FAST position.
Note:
This switch is disabled during FM operations.
@ NOTCH switch
When this switch is ON, the notch fitter is activated.
@® PROC (Processor) switch
Effective transmit power output will increase when the
PROC switch is turned ON during USB, LSB, AFSK, or
FM mode operations.
Note:
When the speech processor function is used in the
USB, LSB, or AFSK mode it is possible to overdrive the
transmitter: An easy way to check for excessive modu-
lation 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.
@ F.LOCK switch
The selected dial frequency is locked and cannot be
changed except thru the use of the RIT/XIT controls,
when this switch is ON.
@ UP/DOWN switches
Pressing the UP switch increases the frequency, and
pressing the DOWN switch decreases it.
8
@) 1 MHz step 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.
@) TUNING dial (VFO)
Rotate the knob to select the desired frequency. Fast
tuning is possible by rotating the knob rapidly. This con-
trol may also be used to select the desired memory
channel. The dial drag is adjustable by holding the out-
side knob and turning the inside knob clockwise to in-
crease drag, and counterclockwise to decrease drag.
@) Program keys
Mev: Used to recall a frequency from memory
to the VFO.
SCAN; Pressing during VFO operation will initiate
program scan, and pressing during memory
operation will initiate memory scan. Press-
ing during scan operatian will cause the
scan speed to toggle between 2 speeds,
fast and slow.
CLEAR: Used to cancel memory storage operations,
or to cancel an entry during direct keyboard
entry of frequency using the ENT key.
VFO/M: Used to switch between memory or VFO
operations.
MIN: Used to enter data into a memory channel.
ENT: Used to directly enter a frequency from the
numeric keypad.
@} PHONES jack
Output termina! for headphones.
@} MIC jack
Connector for a microphone.
GND (STBY)
MICo- OGND (MIC)
STBY ©
NC
DOWNe.
© BV/approx. 10 mA
UP @ i}
MIC connector (Front view)
@8 AT TUNE switch
When this switch is turned ON with the AUTO/THRU
switch is placed in the AUTO position, the automatic
tuner will be engaged and the tuner will try to match
the antenna.
@) AUTO/THRU switch
AUTO: The auto antenna tuner is used in
transmit.
THRU: The auto antenna tuner is not used in
transmit.

@8 Standby switch
This switch is used when you want to manually con-
trot transmit or receive.
SEND: Places the radio into transmit.
REC: Places the radio into receive.
The Standby switch is also used to clear an entry dur-
ing direct entry of VFO frequencies, or when entering
a memory channel,
@) ALC/PWR/SWR meter switch
ALC meter
Used to monitor the drive level in USB, LSB, and AFSK
modes.
PWR meter
Used to indicate the output power. Note that this meter
is a peak reading meter, not an average reading meter.
SWR meter
Used to indicate the Standing Wave Ratio of the an-
tenna and feedline connected to the ANT connector
when the AUTO/THRU switch is in the THRU position.
@ ATT (Attenuator) ‘switch
The incoming receive signal level is attenuated by ap-
proximately 20 dB when this switch is activated.
When the incoming receive signal is very strong (20
dB aver S-9), the signal should be attenuated to pre-
vent distortion of the signal, thereby stabilizing the
receiver performance. This is easily done by activat-
ing the ATT switch. This control is also useful when
a strong signal is near your desired signal, while some
joss will occur to the desired signal as well as the un-
desired signal, the use of the attenuator will sometimes
allow you to complete the OSO.
@) NB (Noise Blanker) switch
When pulsating noise, such as that caused by automo-
bile ignitions is encountered, piace the NB switch ON.
This will provide approximately 40 dB‘s of attenuation
to this interfering signal. If there is no noise present,
the switch should be in the OFF position. This switch
will not help to eliminate atmospheric or line noises,
only pulse type noise.
@ VOICE switch
When the optional VS-1 voice synthesizer unit is in-
stalled the operating frequency will announced
whenever the VOICE switch is depressed. For a dial
frequency of 14.200.0 the frequency will be an-
nounced as: “one”, ‘four’, point’, “two”, “zero”,
“zero, ‘zero’, ‘zero’.
Please refer to page 28 for installation instructions con-
cerning the VS-1 Voice Synthesizer.

3-1-2. -Rear panel
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@ ACC 3 terminal
Spare RCA type terminal. No internal connections have
been made.
@ AFSK IN terminal
AFSK input terminal.
® AFSK OUT terminal
Constant level AF output terminal for AFSK operation,
@ ANTI VOX control
VOX operations are sometimes difficult with high
speaker volume control settings. The ANTI VOX con-
trol is used to reduce the tendency of the VOX to acti-
vate from inputs from the speaker. The ANT! VOX
control is not active when headphones are connect-
ed, for obvious reasons!
(@®\
@® DELAY control
This control adjusts the “‘hang-time” that the radio will
remain keyed after voice input has stopped.
DELAY,
19)
@® VOX GAIN control
This contro} adjusts the sensitivity of the VOX ampli-
fier. Adjust this control for your personal preference.
VOX GAIN
{ YQ’
@ ACC 1 jack
This jack is designed for connection of the 6-pin DIN
connector supplied with the optional interface unit.
EXT. SP (External speaker) jack
This jack is for connection of an external speaker.
@® DC power connector
This fs used to connect the DC power supply.
@ KEY jack f
Using shielded line, connect a 1/4” phone plug to this
Jack for CW operation. Open-terminal voltage is approx-
imately 5.5 VDC.
() ANT (Antenna) connector
This UHF connector should be attached to a suitable
antenna for transmitting and receiving. The antenna ca-
ble should be 50-ohm coax, terminated with a PL-259
connector,
@ GND (Ground) terminal
To prevent electric shock, as well as RFI and BCI, con-
nect the transceiver to a good earth ground.