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.

@ ACC 2 jack
Terminal numbers and their applications are as follows:
View fram the
rear panel.
13-pin DIN plug
Pin No.| Pin Name Application
1_ [Nc No
2 [Ne No connection
2 [Data output | Qutput level is fixed regardless af the
AF contral setting.
Qutput valtage:
300 mV or more st maximum ce-
ceiving inut with 4.7 k@ load.
4 [ono Grounding (The shielded wire of the
audia output terminal is connected
here.)
5 INC No
6 NC No
7 NC No
8 [GNoO Grounding
9 | Mic mute — [Signal input from the MIC jack ig mut-
ed. Grounding mutes signal,
10 NC No connection
11 [Data input — | Input terminal for data communica:
tion. In SSB, MIC gain can be can-
trolled by the MIC control.
Input voltage:
500 mV ot fess
(SSB: Voltage starts deflecting ALC.
FM: Voltage providing 3.0 kHz
modulation ratio.)
12 |GND Grounding (The shielded wire of the
audio input is connected here.}
13° | Standby Standby terminal
Grounding transmits.
() REMOTE connector
Note:
When the control relay is used refer to section 5-8-10.
+12 VDC ON transmit SND)
max. 10 mA,
ALC input
From standby switch
{PTT circuit for foot switch)
T
R Control relay
Internal wiring
View from cord
€S
=
ExD=
3-1-3. Top cover
CW oFF SEMI FULL
Vox OFF ON
VOX/BREAK IN switch
VOX (Voice Operated Switch} operation is possible in
LSB, USB, FM or AFSK mode operations. To activate
the VOX circuitry place the VOX switch ON.
This control js also used to select either Full or Semi
automatic break-in. oss

3-2. RECEIVE
POWER switch: OFF.
SQL control:
Fully counterclockwise.
Standby switch:
REC
met Joey
(a coe]
RF gain control:
Fully clockwise.
AF gain control:
F Fully counter-
clockwise.
RIT switch: OFF
MODE keys TUNING dial (VFO)
3-2-1. Initial setting
1. Preset the controls as shown in the accompanying
2.
a)
No
~
illustration above.
Place the POWER switch to ON. (During fixed-
station operation you must first turn ON your DC.
power supply, the PS-50 is recommended.)
. The meter will illuminate and a frequency will ap-
pear in the display.
. Set the BAND switches for the desired band. If you
desire to tune a frequency other than one of the
amateur radio frequencies, place the 1 MHz switch
ON. With the 1 MHz switch ON the UP/DOWN
switches will advance the frequency in 1 MHz
steps, rather than thru the amateur radio bands.
Select the desired MODE using one of the mode
switches.
Notes:
1. By internationa) convention amateur radio fre-
quencies below 10 MHz utilize the LSB (Lower
Sideband) mode, and frequencies of 10 MHz
and above use USB (Upper Sideband}.
. The TS-440S automatically selects the normal
mode for you. The exact changeover point is.
9.5 MHz. You can override this selection by
pressing the desired mode switch.
iN)
Adjust the AF gain control for the desired volume.
. Slowly rotate the TUNING diai until the desired sig-
nal can be heard clearly.
. The desired receive frequency can also be entered
directly by using the numeric keypad. For details
of this operation please refer to the ‘Direct key-
board frequency entry’’ section on page 13.
3-2-2. CW zero-beat operation
Zero-beat operation with a station during CW mode
operation
1. Set the RIT/XIT switches to OFF.
2, When an optional fitter is not used, tune the TUN-
ING dial so that the receive beat frequency is ap-
proximately 800 Hz. You can check this by turning
the VOX OFF, and then closing your CW key. Then
by using the sidetone oscillator, and the incoming
receive signal you can zero-beat by turning. the
TUNING dial until the two tones are the same fre-
quency.
. When the YK-88C filter is used the simplest method
to use is to adjust the TUNING dial for a maximum
S-meter deflection.
2
Reception at the desired pitch after zero-beat
operation.
1, After zero-beating turn the RIT switch ON, and ad-
just the RIT control for the desired pitch.
2. Adjust the IF SHIFT control for the strongest sig-
nal level.
Your frequency Displayed frequency
I
Receiver carrier frequency~. I ‘Transmit-Receive frequency
(BFO} 4 {Displayed frequency}
|
800Hz
Beat note
Tuning for CW Operation

3-2-3. Direct keyboard frequency entry
Direct keyboard entry of the frequency is possible us-
ing the numeric keypad on the TS-440S. This allows
rapid changes in frequency without the delays encoun-
tered when using other tuning methods.
1. Select the VFO mode.
2. Press the ENT key. The display will indicate
T A VFO, |
. Enter the desired operating frequency from Most
Significant Digit to the Least Significant Digit. You
do not have to enter trailing zeros, but you must
enter a leading zero for frequencies between 1 and
3.99999 MHz or two leading zeros for frequencies
between 0.1 and 0.99999 MHz. (03.500.00 MHz).
After the last digit has been entered press the ENT
key again to signify you want the radio to change
frequency. If you entered the frequency down to
the nearest 10 Hz a beep will sound and the radio
will automatically change to the new frequency
without the need of pressing the ENT key for the
second time.
w
b
For example: To enter 14.200.00 MHz there are
two methods:
Method one: Press [ENT}, [1), [4], [2], [ENT].
Method two: [ENT], [1], [4], [2], [0], [0], [0], [0].
Note:
Attempting to enter a frequency outside the tun-
ing range of the radio will cause the display to return
tov...
a
. If you make a mistake while entering the frequen-
cy and have not yet pressed the ENT key, or en-
tered the final digit, you may cancel the input by
pressing either the CLEAR key or standby switch.
3-2-4. AM reception
There are cases during AM broadcast reception, where
interference in noticeable when SELECTIVITY is W, but
the intelligibility is poor with the radio in the M2 posi-
tion, due to a fack of high frequency response. If this
condition occurs place the SELECTIVITY switch to M2
and rotate the TUNING dial +/— 1 kHz from the center
frequency. It should be possible to find a point where
the interference will be a little greater, intelligibility
should be improved.
Another method utilizes the execellent receiver stabil-
ity of the TS-440S by selecting USB or LSB and tun-
ing to one of the sidebands of the AM signal. The only
disadvantage to this method is that a 5 Hz beat tone
might be detected along with the desired receive signal.
3-3. TRANSMIT
3-3-1. SSB (USB, LSB) mode
. Set the MODE keys to USB or LSB. By internation-
ai convention frequencies below 10 MHz utilize the
LSB (Lower Sideband) mode, and frequencies
above 10 MHz use USB {Upper Sideband). The ac-
tual-switchover-point-on-the-TS-440S.is-9.5.MHz.
The TS-440S will select.the proper mode when you
tune to the desired frequency. You can override this
by simply pressing the desired .mode key.
N
Set the Meter switch to ALC.
ALC PWR _SWR
—_—
» Press the microphone PTT switch, or set the Stand-
by switch from REC to SEND.
cad Speak into the microphone and adjust the MIC gain
control so that the meter deflection does not ex-
ceed the ALC zone on voice peaks.
Note:
Adjustment using the ALC meter provides greater ac-
curacy than if you try and use the power meter for ad-
justment. Never adjust for ALC deflection above the
ALC zone, as this will cause distortion of the transmit-
ted audio signal.
ALC zone
Note:
Do not exceed the ALC zone on voice peaks.

3-3-2, CW mode
Set MODE keys to CW and set the Meter switch to
ALC.
ALC_ PWR _SWR
_
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 rode by simply depressing the key, with the
Standby switch in the REC position.
Adjust the CAR control until the meter deflection is
within the ALC zone.
ALC zone
¢ SEMI and FULL break-in
Two break-in methods are provided with the TS-440S
transceiver, SEMI and FULL break-in. With either break-
in operation depressing the CW key will cause the ra-
dio to transmit without the need for manually switch-
ing 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 dash-
es, 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. Addition-
ally, when you are using FULL break-in operation you
should not work cross band splits, only in the same
band.
The TS-440S also provides a side-tone oscillator cir-
cuit to allow monitoring of your CW signal during trans-
mission.
{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 VOX DELAY control on the rear panel
of the transceiver, even after the CW key is
released.
cw
VOX OFF ON
(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 immediately
enabling reception between characters.
Caution:
The TL-922A/922 linear amplifer 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.
CW OFF _ SEMI FULL
On occasion an electronic keyer may be used that
has no method of producing a continuous trans-
mit condition. In order to obtain a continuous car-
rier for tuning simply place the Standby switch to
the SEND position.
3-3-3. FM mode
Select the desired frequency within the 28 MHz
amateur radio band. Place the MODE key to FM and
the Meter switch toe ALC.
ALC_ PWR SWR
—_—
Press the microphone PTT switch or place the Stand-
by switch to SEND.
Adjust the CAR control until the meter deflection is
within the ALC zone. This will provide full power in the
FM mode. -
To decrease the power, place the Meter switch to PWR
and while observing the meter rotate the CAR control
counterclockwise until the desired output level is ob-
tained.
ALC_ PWR _SWR
—_
ALC zone
Notes:
1. The FM power output may fluctuate if running less
than full output.
2. Ensure that an antenna with a low SWR is used.
The TS-440S provides several protection circuits,
continually loading into an antenna with a high SWR
(3 to 1 or greater) will eventually cause damage to
the final amplifiers.
. The PWR meter reading may not be accurate with
high SWR values. Use a good antenna for the most
accurate readings.
oo

¢ Subaudible tone
An optional subaudible tone unit TU-8 is available for
installation in the TS-440S for accessing 10 meter FM
repeaters. This tone is activated whenever the
TS-440S is in the SPLIT mode.
3-3-4. AM mode
1. Set the Meter switch to PWR.
2. Set the MODE key to AM.
3. Place the Standby switch to SEND.
4. Adjust the CAR contro! so that the meter indicates
25 watts.
Placé the Meter switch to ALC.
. Adjust the MIC gain contro! so that the meter
deflection does not exceed ALC zone on voice
peaks.
oo
3-4. AUTOMATIC ANTENNA TUNER
(The AT unit AT-440 is required for
this function.}
The automatic antenna tuner operates within the
amateur radio bands from 3.5 thru 29.7 MHz.
. Ensure that an antenna designed for use within the
band you intend to operate on is properly connect-
ed to the antenna terminal. .
N
. Set the AUTO/THRU switch to the AUTO position.
wo
. Place the AT TUNE switch to the ON position. The
AT TUNE indicator will light and the tuner will be-
gin tuning. Then the CW made indicator will light.
i
. After a short period the AT TUNE indicator will go
OFF and the motors will stop turning.
oO
. Place the AT TUNE switch to OFF.
a
. Tuning is now completed. You may now carry out
normal communications.
Notes:
4. When the AT TUNE switch is ON and the AT indi-
cator lights but then goes out immediately it is an
indication that the antenna was not that far off
resonance and that tuning has been completed.
. Normal operation is not possible until the AT TUNE
switch has been turned OFF.
. if the motors do not stop turning after approximately
30 seconds, place the AT TUNE switch to OFF, and
then back to ON again. The tuner will attempt to
tune again, and should find a good match. If the
tuner will not stop after several tries it indicates
some problem exists with the antenna system.
Readjust the antenna and feedline before attempt-
ing to tune again.
NS
wo
3-5. DUAL DIGITAL VFO’s
Operational convenience can be enhanced thru the use
of both VFO A and VFO B.
3-5-1. Why two VFO’s
Occasionally DX stations will utilize an operational
procedure known as split frequency operation. When
the DX station is in this mode he will be transmitting
on
one frequency and receiving on another. This is
done in order for the DX station to be able to recog-
nize the calls of stations during pile-ups.
Older transceivers required the use of an external VFO
to aliow this split frequency operation. The TS-440S,
thru the use of microprocessor controls, effectively pro-
vides two separate VFOs in the same package. Several
different controls and switches have been provided to
increase the operators convenience when faced with
this type of operation. The use of these controls is dis-
cussed below.
3-5-2. Split frequency
{a}
(b]
{d)
A=B switch
Depressing this switch causes the data contained
in the inactive VFO (the VFO that is not currently
being displayed} to change to the same data con-
tained in the active VFO {the one currently dis-
played). Both the frequency and mode are
‘Changed. ~~~ oo . ~
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 switch
will cause VFO B to change to 7 MHz in LSB.
A/B switch
Allows selection of the desired active VFO. Each
time this switch is depressed the active VFO will
alternate between VFO A and VFO B.
SPLIT switch
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. switch will
cause the TS-4408 to receive on VFO A and trans-
mit on VFO B. The mode of reception and trans-
mission will follow the mode contained in the
appropriate VFO memary. It is possible to work
cross band, cross mode if desired.
To avoid confusion during contest, or pile-up oper-
ations we recommend using VFO A for receive and
VFO B for transmit.
T-F SET switch
Depressing this switch will allow you to rapidly set
or check the transmit frequency, during SPLIT
operations, without the need of actuaily trans-
mitting.
This switch is especially convenient when you are
trying to locate the transmit frequency of the sta-
tion currently in contact with the DX station, since
15

depressing this switch allows you to receive on the
transmit frequency as long as the switch is held
depressed. The TUNING dial is active when this
switch is depressed, so it is easy to change your
transmitter frequency at the same time, if neces-
sary. Releasing the switch will return you to the
original receive frequency.
3-6. MEMORY
The TS-440S incorporates a convenient 100 channel
memory that can be used to store and recall common-
ly used frequencies. These channels can be subdivid-
ed into 10 user-defined groups to tailor the TS-440S
for optimum operation in a particular application. You
can, for instance, assign channels 10 through 18 to
the 160 meter band, channels 20 through 29 to the
80 meter band, channels 30 through 39 to the 40
meter band (LSB), channels 40 through 49 to the 20
meter band (USB}, channels 50 through 59 to the 15
meter band, channels 60 to 69 to the 10 meter band
(FM), channels 70 through 79 to the 12 meter band,
and channels 80 through 89 to various shortwave
bands. Channels 90 through 99 could then be assigned
as split frequency channels. After completing channel” ~
assignments, you can then use the convenient memory
scan function to automatically recall the stored fre-
quencies on a group basis.
3-6-1. Memory Entry
1. With the TS-440S in the VFO mode, select the
desired operating frequency and mode as described
in previous sections.
x We
tty 7
44759 |
Nn
. Press the M.IN switch. The radio will enter the
Memory Scroll (M.SCR} mode. The current memory
channel number (M.CH), frequency and made will
be displayed, but the actual operating frequency
and mode will remain unchanged allowing uninter-
Tupted reception.
oe |
eo
. Select the desired memory channel using one of the
three methods described below.
a. Turn the TUNING dial until the desired channel
number is displayed (One revolution of the dial
cover about 10 channels}.
b, Enter a two digit channel number using the nu-
meric keypad, being sure to include the leading
zero for channels OO through O9. Pressing the
CLEAR key or the standby switch before press-
ing the second digit will return you to the origi-
nal channel.
c. Use the UP/DOWN switches and/or microphone
UP/DOWN switches to scroll thru the different
memory positions.
5, When the desired memory channel is displayed,
press the M.IN key again. The current frequency
and mode will be stored, the scroll made will be
cancelled, and the TS-440S will return to the oper-
ating mode and frequency that was displayed be-
fore the M.IN key was pressed initially. Note that
if RIT was'selected prior to step 2, the actual fre-
quency stored will be the indicated frequency plus
or minus the RIT variable.
3-6-2. Transferring memory information to the VFO.
1. Press the VFO/M key to select the memory mode.
t 7
es (44759 |
N
Select a channel using any of the methods dis-
cussed under the Memory Entry section.
oom n
secdaaona
oR
wo
. Press the MV key. The stored data will be trans-
ferred to the active VFO allowing you to begin tun-
ing from that point. The TS-440S automatically
returns to the VFO mode when the MV key is
depressed.
|
Note
1. The RIT/XIT status will be copied from the memory
to the VFO when the MV key is depressed.
2. When data is transferred from the split frequency
memory, the active VFO is loaded with the receive
data and the inactive VFO will be loaded with the
transmit data. The TS-4408S will then automatical-
ly enter the SPLIT mode,
3. This operation will not function if no data is con-

tained in the displayed memory channel.
4. Data in the VFO is replaced by the memory data.
Memory data is not lost during this operation.
3-6-3. Transferring data between memory channels
1, With the TS-4408 in the memory mode, press the
M.IN key and scroll to the channe! that you want
the data ‘to be transferred to.
Ge
a
lp Pitt |
. Pres§ the M.IN key. The frequency and mode of the
memory channel that appeared before you pressed
the'M.IN key will duplicated in the new channel.
wor
5 fu Ie
Gera i iad
3-6-4, Entering/Transferring data in the split fre-
quency channels
Separate transmit.and receive frequencies may be en-
tered into memory channels 90 through 99. The proce-
dure is similar to that given for the other channels with
the following exception: we ee
1. The active VFO frequency and mode is stored in
the receive memory, and the inactive VFO frequen-
cy and mode is stored in the transmit memory,
regardless of whether the SPLIT function is ON or
OFF.
. The RIT offset is stored in the receive memory, and
the XIT offset in the transmit memory.
3. When data is transferred from the general memory
section into the split frequency memory section the
transmit and receive frequencies will be the same.
4. Only the receive memory will be transferred into
general memory during transfer operations from the
split memory area.
N
N
3-6-5. Clearing a memory channel
Two methods may be used to clear a memory
channel:
1. M.IN switch
Transferring information from a vacant channel, i.e, one
that has no stored information, thru the use of the M.IN
switch, as described previously in section 3-6-1 is one
method of ‘‘clearing’’ a memory channel.
2. ENT switch
Data may aiso be erased by depressing the ENT key
while depressing the CLEAR key.
3-6-6. Memory recall
Fixed channel type recall is possible when using the
VFO/M key to recall memory channel information. The
stored frequency cannot be changed, although the
RIT/XIT function is active.
1, Press the VFO/M key. The memory channel num-
ber, mode, and stored frequency data will be dis-
played. If a channel contains no data, only the
channel number will be displayed.
or
ae 27 mt
e314 7758 |
2. Select the desired memory channel using the
methods described under Memory Entry section.
rei2eso |
3. To return to the VFO mode, press the VFO/M key
again.
carr)
| asa ]
Notes:
1. RIT/XIT will be cancelled when the TS-440S is
switched from the VFO mode to the memory mode,
but will be restored when the TS-440S returns to
the VFO mode.
2, When the TS-440S is switched from the memory
mode to the VFO mode, the VFO will be set to the
RIT/XIT variable specified when the data was
programmed in to memory.
3-7. SCAN
3-7-1. Memory scan
Memory scan operates from memory channel 00 thru
memory channel 99 at approximately 3-4 second in-
tervals, or you may specify which memory groups you
want to scan. Only these memory channels with data
entered are scanned.
To initiate memory scan of all mamory channels
1. Press the VFO/M key to select the memory mode.
2. Press the SCAN key. Scan will begin at memory
channel 00, or the lowest numbered channel con-
taining data.
You can stop scanning by pressing the CLEAR or
microphone PTT switch. Pressing the PTT switch
will atlow you to continue scanning from the point
that you stopped, and pressing the CLEAR key will
allow you to start scanning from the beginning.
4. To resume scan press the SCAN key again.
w
To initiate memory scan of specific memory channel
groups.
1, Press the VFO/M key to select the memory mode.
2. Press and hold the SCAN key.
3. You may specify which memory groups you want
to scan by depressing the key that corresponds to
the ten position of the memory channel group.
fo) - Memory channels 00 thru 09
Cc. . Memory channels 10 thru 19
seetaseeeenes Memory channels 20 thru 29
wees Memory channels 90 thru 99
17

In example 1 we want to scan only Group 2, so we
would press the 2 key. In example 2 we want to scan
Group 1 and Group 2, so we would press the 1 key
and then the 2 key.
Example 1
Group 2
ia!
Example 2
Group 1 Group 2
cHes oHo cHIa CHSO. cH39
4, You can stop scanning, or resume scan using the
same methods described above for the entire
memory scan.
3-7-2. Program scan
Two programmable scan ranges are provided on the
TS-440S transceiver. PG.S-1 (Program Scan range 1}
utilizes memory channels 06 and 07 to specify the up-
per and lower scan limits. PG.S-2 (Program Scan range
2) utilizes memory channels 08 and O9 to specify the
upper and lower scan limits.
To initiate PG.S
1, Press the VFO/M key to select VFO operation.
NR
. Press and hold the SCAN key.
@
. To initiate PG.S 1 press the 6 key, and then release
both the 6 and the SCAN keys. Scan will begin on
the frequency programmed in memory channel
number 6 and proceed in 10 Hz steps to the upper
jimit stored in memory channel 7, then return to
channel 6 and begin again.
Ge POS-I—,
HE PAS: CH?
ra S18 00 14.0000
oo
Le ---aad
&
. Toinitiate PG.S 2 press the 8 key, and then release
both the 8 and the SCAN key. Scan will proceed
in the limits specified in memory channels 8 and
9, just as for PG.S 1.
r——PGS-2—,
ons CHa
14,200.00 14, 320,00
g . if you want to scan both ranges PG.S 4 and PG.S
2, press the 6 and then the 8 key while holding the
SCAN key down, and then release the SCAN key.
Scan will proceed thru the limits in memory chan-
nels 6 and 7, thru the limits in memory channels
8 and 9, and then return to begin the process again.
—PGs-2—
cH ons
a
To stop scanning press the PTT switch, or the
CLEAR key. Pressing the SCAN key allows scan to
resume from the point you stopped.
Note:
The TS-440S microprocessor remembers the various
scan parameters that you have specified and will fal-
low whatever you have entered the next time you
press the SCAN key.
Example 1: Memory mode
Previously programmed memory scan
data was to scan channels 20-29 and
40-49.
To scan this same range again simply
press the SCAN key.
Example 2: VFO mode
Previously entered program scan data
was to scan both PG.S1 and PG.S2.
To initiate program scan over these two.
ranges again simply press the SCAN key.
The TS-4408 will continue to execute scan according
to the above parameters until you manually change the
information. This saves a lot of key strokes if you al-
ways scan the same ranges, etc.
3-7-3. Scan speed
Two scan speeds are available with the TS-440S.
To change the speed press the SCAN key after you
have initiated scan. You will be able to taggle between
fast and slow each time you press the key.
Note:
The scan step size depends upon the mode that has
been selected for SSB, CW and AFSK the step size is
10 Hz, for FM and AM the step size is 100 Hz.
3-7-4, Memory channel lockout
This transceiver has a memory channel lockout func-
tion which allows you to temporarily skip unwanted
memory channels during memory scan.
. Press the VFO/M key to enter the memory mode.
2. Select the memory channel that you want to skip
using the numeric keypad, the TUNING knob, or the
UP/DOWN microphone or BAND switches.
. Press the CLEAR switch.
wo
mom
5 fu PIE A
esd Tea |
-
. A decimal point will appear in the M.CH display to
indicate that the channel will be skipped.
wen
aus 76 7
ea itl 5 |
a
. To cancel the lockout, select the desired channel
and then press the CLEAR switch. The decimal
point will go out indicating that the channel will
again be scanned.
2th i7Sd |

3-8. AFSK
3-8-1. Reception
Note:
An RTTY termina! is required to receive and dis-
play/print the RTTY signal.
. The AFSK mode utilizes the LSB carrier frequency,
which conforms to international conventions.
2. When the optional YK-88C filter is instailed, the nor-
mal receiver bandwidth is 500 Hz when the SELEC-
TIVITY switch is set to the AUTO position, and the
ODE switch is in AFSK.
The accompanying diagram illustrates the relation-
ship between the carrier and the passband width.
3. The demodulated AFSK signal is sent from the
AFSK OUT terminal on the rear panel.
4. This cornpletes the preparation for using the AFSK
mode.
Note:
Before connecting the terminal you should review the
contents of the instruction manual previded with that
terminal unit.
AFSK IN, 15-440 Y=
AFSK keying signal
ATTY
AFSK receive signal
AFSK OUT
The figure below shows the frequencies relationship.
2295H2
2iasHz
SSB Filter
rons oe
rol
4 CW Filter
jy
14.09771MHz 14.09788MHz
SPACE MARK
14.10000MHz
RX CARRIER
3-8-2. Transmit
Note:
Key down periods of 1 hour will require a cool down
period of approximately 30 minutes. The PS-50
heavy-duty supply is recommended for continuous
duty transmission.
. Ensure that your terminal is set up for AFSK type
keying.
2. Connect the terminal units AFSK output jack to
TS-440S AFSK IN jack, and the terminal unit’s
AFSK input jack to the TS-440S AFSK OUT jack
on the rear panel of the transceiver. The terminal
units standby (PTT) terminal should be connected
to the standby terminal on the REMOTE connector
of the TS-440S. (See page 11 for the REMOTE ter-
minal pin configuration.)
. Place the MODE key on the TS-440S to AFSK, and
the Meter switch to ALC.
4. To transmit, either place the SEND/REC switch on
the TS-440S to SEND, or use the PTT signal from
your terminal unit.
5. When using AFSK, you can also apply your trans-
mit signal tones to pin number 1 of the microphone
connector; if you do not wish to use the two jacks
on the rear of the TS-440S. To adjust the power
output in AFSK, increase or decrease the MIC gain
control setting. A mid-scaie ALC reading will yield
full power output.
Notes:
1. AFSK operation requires terminal unit designed to
supply this type of operation. You cannot use FSK
tones with an AFSK jack!
. The AFSK oscillator circuit should provide audio
tones of 2125 and 2295 Hz. Lower tones may
cause spurious output due to the higher harmonic
content present with these lower frequencies.
. The TS-4408 and RTTY terminal unit should use
separate power supplies, in order to prevent RF!
(Radio Frequency Interference).
. During AFSK mode operation, the microphone
switch should be OFF or ground pin No. 9 of the
ACC 2 jack, or the microphone disconnected, if you
are using the AFSK jacks on the rear panel.
. The AFSK input level should be less than 100 mV.
wo
N
wo
S
a
3-8-3. AMTOR operation
For AMTOR operation, you should reverse the trans-
mit/receive input polarity on your AMTOR terminal,
since AFSK on the TS-440S operates in the LSB mode.
If you cannot reverse the polarity. you should select
the USB mode on the TS-441
During AMTOR operation, he microphone switch
should be OFF, or ground pin No. 9 of the ACC 2 jack,
or the microphone disconnected, if you are using AFSK
IN/OUT jacks on the rear panel.
3-9. OPERATION WITH A LINEAR AMPLI-
FIER
The TS-440S may be operated with any conventional
linear amplifier which will accept up to approximately
125 watts of RF drive, has alow current DC operated
keying circuit, and returns approximately ~8 to ~1
VDC ALC back to the exciter. Please note that in ord-
er to operate full OSK (FULL break-in} the linear ampli-
fier must also.be OSK capable.
Refer to the REMOTE connector diagram on page 11
and section 5-8-10..
Initial linear amplifier tune-up should be performed with
the TS-440S set for approximately 50 watts output
to reduce wear and tear on both the linear, and the
TS-440S. Use of a dummy load is strongly recom-
mended, since the bands are already sufficiently
crowded.
19

4. CIRCUIT DESCRIPTION
4-1. GENERAL DESCRIPTION
The TS-440S utilizes double-conversion for FM trans-
missions,- and triple-conversion for ail other transmis-
sion modes, and for all modes in receive. The
intermediate frequencies are 45.05 MHz, 8.83 MHz
and 455 kHz.
A wide dynamic range is made possible thru the use
of 28K 125 junction FET’s in the receiver section’s 1st
and 2nd mixers, and by a 35K73 dual-gate MOS FET
in the 3rd mixer.
An integrated circuit balanced modulator (AN61 2) is
used in the 1st transmitter mixer and 2SK122's are
used in the 2nd and 3rd mixers. The PLL circuit, con-
sisting of 5 loops, and the digital VFO are controlled
by a single reference oscillator circuit. IF SHIFT and 10
Hz tuning steps are provided thru the use of this
system.
4-2. TRANSMITTER SECTION
The incoming microphone audio is routed to the IF unit
where it is amplified by the microphone amplifier and
then distributed to the SSB, FM and VOX circuits. The
SSB signal is applied to the balanced modulator, then
amplified and converted to the 1st IF frequency of 455,
kHz. This DSB (Double Side Band) signal is filtered to
obtain the SSB signal. The SSB signal is mixed with
the local oscillator frequency of 8.375 MHz in the 1st
mixer to obtain the 2nd IF signal of 8.83 MHz. This
signal is filterd by a CF (Ceramic Filter) to remove the
unwanted by-products of the mixing action. The
filtered output is applied to the RF unit.
in the RF unit the signal is mixed with the HET OSC.
frequency of 36.22 MHz by the 2nd mixer to obtain
a frequency of 45.05 MHz. This signal is combined
with the VCO signal in the 3rd mixer to obtain the
transmit frequency which is applied to the Final unit
via a LPF {Low Pass Filter). The Final unit amplifies the
signal to the desired power level and then routes the
signal thru an additional LPF to the antenna terminal,
or the Antenna Tuner, if installed.
4-3. RECEIVER SECTION
The incoming signal for the antenna is fed to the
receive band-pass filters in the RF unit, via a front panel
controlled attenuator circuit. Selection of the desired
BPF is accomplished thru data supplied from the Con-
trol unit. Signals from the BPF are mixed with the VCO
signal in the 1st RX mixer to obtain the 1st IF frequen-
cy of 45.05 MHz This signal is filtered by a MCF
(Monolithic Crystal Filter) and appiied to the 2nd RX
mixer. This mixer combines the 1st IF frequency with
the HET OSC frequency of 36.22 MHz to obtain the
2nd iF frequency of 8.83 MHz.
The 2nd IF frequency is split into two paths, one to
the noise blanker circuits, and the other past the noise
blanking gate to the 2nd ‘F filter. The signal that is
taken from the output of the 2nd IF filter is applied to
the 3rd RX mixer, via a buffer amplifier, where it is
mixed with the focal oscillator frequency of 8.375
MHz, to obtain the 3rd IF frequency of 455 kHz.
20
This 3rd IF frequency is either amplified and then
demodulated by the FM detector IC, for FM operation,
or applied to the 455 kHz filter. After filtering the sig-
nal is amplified and applied either to the SSB or AM
detector circuits.
4-4. CIRCUIT BOARD DESCRIPTION
The TS-440S contains the following major units:
RF unit, IF unit, Control unit, PLL unit, Fitter unit, AT
unit, etc. A brief description of these units follows.
4-4-1. RF unit (X44-1680-00)
The receive section of this unit includes the BPF’s for
each band, the 1st RX mixer, a 45.05 MHz MCF, the
2nd RX mixer, noise blanker circuits, and an 8.83 MHz
MCF. The transmit section includes the 2nd TX mix-
er, 3rd TX mixer, amplifier circuits, FM microphone am-
plifier circuit, microphone limiter circuits, and four
VCO’s required to cover the frequencies fram 100 kHz
to 30 MHz.
4-4-2. IF unit (X60-1300-00)
The receive section of this unit contains the 8.83 MHz
filter, 3rd RX mixer, 455 kHz filter, detector, and low
frequency. amplifiers.-The. transmit. section. contains.the-
microphone amplifier, balanced modulator, 1st TX mix-
er, 8.83 MHz filter, etc. This unit also includes the tim-
ing circuit which contro!s the CW break-in circuit, and
the 8.375 MHz local oscillator circuit.
4-4-3. Control unit (X53-1450-00)
The unit is centered around the main microprocessor,
and provides a wide variety of contro! signals for all
the various units.
4-4-4. PLL unit (X50-2050-00)
Five PLL loops are provided, as well as the reference
crystal oscillator (36 MHz).
4-4-5, Final unit (X45-1470-00)
This unit amplifies the TX RF signal for transmission.
TS-440$ has an output of 100 W. This is accomplished
by utilizing a three-stage final amplifier section having
a relatively low collector loss figure, and a high effi-
ciency cooling system.
4-4-6. Filter unit (X51-1340-00} '
Provides for a high quality transmitter output by reduc-
ing: unwanted harmonic emissions. This unit also de-
tects the forward and reflected power sensing circuits
for ALC, SWR and Antenna Tuner circuits.
4-4-7. Automatic Antenna Tuner unit (X57-1150-00)
This unit consists of the tuner and control sections. The
tuner section consists of three coils and motor driven
variable capacitors which form the actual tuning cir-
cuit, The control section takes the information provid-
ed by the filter unit, as well as band and frequency data
provided by the RFunit to contro the variable capaci-
tors, and switching off the coil, The automatic anten-
na tuner operates from 3.5 thru 29.7 MHz.