MAINTENANCE

SERVICE MANUAL
FT- 107M

YAESU M U S E N CO., LTD.

C.P.O. BOX 1 5 0 0
TOKYO. JAPAN

YAESU ELECTRONICS CORP.

P.O. BOX 49
PARAMOUNT, CALIFORNIA, 90723
 SECTION 1- GENERAL

GENERAL DESCRIPmON ....................................................... 1-1

SPECIFICATIONS .............................................................. 1-2
SEMICONDUCTORS ............................................................ 1-3
FRONT PANEL CONTROLS 'AND SWITCHES ..................................... 1.4
RECOMMENDED ACCESSORIES ................................................. 1.9
MICROPHONE CONNECTIONS ................................................. 1.11
INTERCONNECTIONS ......................................................... 1-12
INSTALLATION: FT-107M .....................................................1-13
r ; OPERATION .................................................................1-16
 YAESU
ALL SOLID STATE HF SSB TRANSCEIVER
C FT-107 M

GENERAL DESCRIPTION
The FT-IO7M is a precision-engineered, high- The FT-107M receiver section features a Schottky
perfomance HF transceiver of advanced design, diode ring mixer, plus individually-tuned input
featuring al1 band coverage (160-10 meters) on bandpass filter networks, for excellent intercept
SSB, CW,.AM, and FSK. This transceiver operates characteristics. An audio peaklnotch filter is also
at an input power of 240 watts on SSB/CW, and included, in addition t o Yaesu's variable IF band-
8 0 watts on AMIFSK. width feature, which uses two 8-pole filters to
provide continuously variable width of the IF
The all-solid-state design aiiows instant band passband from 300 Hz t o 2.4 kHz.
C changes, without so much as a preselector adjust-
ment. Digital plus analog frequency display is used Designed for operation from a 13.5 VDC supply,
in this transceiver, with an advanced LSI frequency the FT-IO7M may be used with either the FP-107
counter providing accurate frequency readout intemal AC power supply o r the FP-107E externa1
without calibration when switchiig modes. VOX, AC power supply/speaker console. Either supply
an RF speech processor, and a built-in SWR meter will provide excellent regulation, for many years
are included for.maximum versatility. of satisfying opeiation.

Yaesu's exciting memory circuitry is available as an We recommend that you read the following pages
option, providing u p to twelve channels of fre- carefully, s o as to derive maximum enjoyment
quency memory, with clarifier adjustment allowing from the feature-packed FT-107M.
offset from memory channels. And Yaesu's new
Digital Memory Shift (DMS) aiiows u p t o 500 kHz

C ' offset from any memory channel, in 100 Hz steps

programmed by a photo-interrupter control. When
the memory option is installed, an optional scan-
ning microphone may be used t o provide up/down
scanning with fingertip ease, using pushbuttons on
the microphone.
 SPECIFICATIONS
GENERAL Transmitter frequency stabiiity:
Frequency coverage: +300 Hz after 10 minute warmup; less than (
160m 1.8 - 2.0 MHz 100 Hz after 300 minute warmup
80 m 3.5 - 4.0 MHz
40 m 7.0 - 7.5 MHz Modulation type:
30 m 10.0 - 10.5 MHz A3J : balanced modulator
20 m 14.0 - 14.5 MHz A3 : amplitude modulation of a low power
17 m 18.0 - 18.5 MHz stage
1Sm 21.0 21.5 MHz
- FSK shift: 170 Hz
12m 24.5 - 25.0 MHz
10 m 28.0 - 29.9 MHz Antenna output impedance:
Power requirements: 50 ohms, unbalanced
DC 13.5 volts t 10 %
Microphone input impedance:
Power consumption: 500-600 ohms (low impedance)
DC 1.5 amps receive
20 amps transmit
RECEIVER
sie:
334 (W) x 129 (H) x 400 (D.) mm Sensitivity:
including heat sink 0.25 pV for S/N 10 dB (SSB, CW, FSK)
i.OpV for SIN 10 dB (AM)
Weigh t:
Approx. 12.5 kg. Image rejection:
Better than 60 dB (160-12 m)
Better than 50 dB (10 m)

IF rejection:
Emission type: Better than 70 dB
LSB, USB(A3J), CW(Al), AM(A3), FSK(F1)

Power input: SSB 2.4 kHz at 6 dB down, 4.0 IcHz at 60 dB

240 watts DC (SSB, CW) down
C
80 watts DC (AM, FSK) CW (with optional 600 Hz CW fiter)
600Hz at 6 dB down, 1.2 kHz at 60dB down
Canier suppression: AM (with optional 6 kHz AM filter)
Better than 40 dB at 14 MHz 6 kHz at 6 d~ down, 12 kHz at 60 dB down

Unwanted sideband suppression: RF attenuator:

Better than 50 dB (14 MHz, 1 kHz) 20dBi3dB

Spurious radiation: APF, Notch frequency response:

Better than 50 dB down 300 Hz to 1.4 kHz

Transmitter frequency response: Bandwidth control:

350-2700 Hz (-6 dB) Continuous from 2.4 IcHz to 300 Hz

Third order distortion products: Audio output impedance:

Better than 3 1 dB down 4-16 ohms

Negative feedback: Audio output:

6 dB at 14 MHz 3 watts at 10 % THD, 4 ohm loa&
1-2
 GENERAL

SEMICONDUCTORS
Transistor Germanium Diode
2SA564A 2SC1674L 1N270(GB) 18 IS1007(GB) 34
c 2SA733 2SC1815GR
2SA952L 2SC1815Y Silicon Diode
2SC3 72Y 2SC1959Y 10D1 2 IS1555 148
2SC38OY 2SC2290 lOD10 4
(2SC3 80TM-Y) 2SC233 1
2SC535A 2SC2395 Schottky Bamer Diode
2SC735Y 2SD235Y 1SS16 1O
2SC1000GR MPS-A 13
2SC1583 2N4427 Varactor Diode
2SC1589 FC63 1 l S7236
l S2209 1
FET
2SK 19GR Zener Diode
YZ-O33 1 WZ090 1

IC LED
pPA54H 1 MSM9520RS 1 LN224RP 7 GD4203SRD 3
p PC3 24C 1 MC14011B 1
pPC2002H l MC14016P l LED Display
TA7060P 1 NJM78L05 1 5082-7623 6
TA7063P 1 pPC14305 1
SN76514N I pPC14308 3
c 34024P 1
Specifications subject to change without notice

ACCESSORIES

The following accessones are included with your

FT- 107M FT-107 SERIES MODEL CHART
C DC Power cord FEATURE
A L L BAND CRYSTALS
FT-107M
Speaker plug MEMORY U N I T I D M S
RCA plug CW FILTER
A M FILTER
DC fuse (20A) R F SPEECH PROCESSOR
Extender legs I30 mm) MICROPHONE ISTANDARDI
MICROPHONE (SCANNING] X
Pad for legs AC POWER SUPPLY X

O = Standard feature X = Availableoption

CAUTION
WHEN REPLACING FUSES IN THE DC
CABLE, USE ONLY A 20 AMPERE FUSE.
OUR WARRANTY DOES NOT COVER

<' DAMAGE CAUSED BY USE OF AN IM-

PROPER FUSE. NEVER CONNEcT AC
POWER DIRECTLY TO THE REAR PANEL
DC POWER CONNECTOR.
 FRONT PANEL CONTROLS AND SWITCHES
This transceiver has been specifically designed for grade transceiver performance: Therefore, be
ease of operation. However, the operator may not certain that you understand the function of every
be familiar with the function of some of the con- control and switch before operating the FT-IO7M. C
trols, and improper adjustment thereof may de-

( l ) FWDSET ( 6 ) MIC
t
This switch sets the SWR meter sensitivity level. This eight-pin connector accepts the microphone
andio input, as we11 as the push-to-talk (PTT)
(2) VOX-CAIN and scanning control lines.
This control selects MOX/PTT/VOX relay control,
as we11 as adjustment of the VOX (voice-operated
TX/RX switching) circuit. The PTT position pro- This control vanes the noise blanker threshold
vides push-tc-talk operation from a microphone level.
PTT switch or a footswitch. The MOX position
(8) PHONES
c
provides manual transmit; this switch must be
returned to the PTT position for receiver recovery. This is a standard twc-pin phone jack for output to
- your headphones. The impedance is 4 ohms, and
(3) DRIVE the intemal speaker will be cut off when a plug is
On CW, FSK, and AM, this control sets the carrier inserted into this jack.
level. On SSB, with the RF processor ON, this
control sets the drive level. (9) COMP
This control sets the compression level for the RF
(4) MIC GAIN speech processor.
\' \
This control sets the AM and SSB microphone
amplifier gain level. (10) MODE
This switch selects the desired mode: LSB, USB,
(5) POWER CW-W, CW-N, FSK, and AM. When the optional C
This is the main power on/off switch for the 600 Hr or 350 Hz CW filter is installed, the CW-W
transceiver. position will use the two 8-pole SSB filters, while
the CW-N position will use the 6-pole CW filter and
the &pole SSB filter used for the variable band-
width feature.
1-4
 GENERAL

( l l ) WIDTH RX MR The receive frequency is controlled by

the memory unit and/or DMS, while
This control vanes the IF handwidth (except on
the transmit frequency is controlled
AM) from 2.4 kHz down t o 600 Hz.
by the intemal VFO.
c 12) AF CAIN TX MR The transmit frequency is controlled
by the memory unit and101 DMS,
This control vanes the audio output level from the
while the receive frequency is con-
speaker o r headphones. Clockwise rotation in-
trolled by the internal VFO.
creases the audio output level.

(19) PUSH SWITCHES (M, M SET, TX CLAR,

This control vanes the gain of the receiver R F and RX CLAR)
IF amplifiers. For proper S-meter operation, this
M Push the M button to store a fre-
meter should be set fully clockwise.
quency in memory.
M SFT Push this switch to activate the.
DMS system.
This control vanes the frequency response of the
audio peak/notch filter. The peak/notch filter
TX CLAR While using the internal VFO or
may be varied over the range 300 Hz-1400 Hz.
RX CLAR) memory, push the TX CLAR switch to
provide offset from the TX frequency.
( I S) MAIN TUNING KNOB
Push the RX CLAR button to provide
This is the main frequency tuning dial for the offset of the receive frequency, and
transceiver. push both buttons t o provide offset
of the transceive frequency from the
(16) ANALOG AND DIGITAL DISPLAYS dial frequency.
The analog display is calibrated every 50 kHz,
with 1 kHz marks providing finer resolution. The (20) CLARIFIER
digital display provides resolution to 100 Hz. The CLARIFIER allows offset from the VFO
or memory frequency, according to the selection
(17) BAND made by pushing the TX CLAR and/or RX CLAR
This switch selects the desired band buttons.

( l 8) SELECT SWITCH (21) M FINE

C This switch selects the means of frequency control This control allows fme tuning dunng memory
for the transceiver. The details below apply t o the operation.
fully equipped FT-107M (DMS unit installed).
(22) M SET
TX EXT The transmit frequency is controlled
by the FV-107 extemal VFO This control activates the DMS system, allowing
(option), while the receive frequency offset tuning from a memory channel in 100 Hz
is controlled by the FT-107M internal steps, The M FINE control may, in tum, be used to
VFO. tune between the 100 Hz steps.
RX EXT The ieceive frequency is controlled by
(23) M CH
the FV-107 external VFO (option),
while the transmit frequency is con- This control selects the desired memory channel.
trolled by the FT-107M internal VFO.
(24) LEVER SWITCHES
EXT The transceive frequency is controlled
c I by the FV-107 external VFO (option) PROC This switch activates the RF speech
processor.
MR The transceive frequency is controlled
by the memory unit and/or the DMS ATT This switch activates a 20 dB attenu-
(Digital Memory Shift) control. ator in the incoming signal path.
APF/ This control selects either the Audio
Peak Filter (APF) or the audio notch
filter.
AGC This switch selects the AGC recovery 01
time constant. Selection of slow, fast,
and AGC O F F is possible.
NB/MARK This switch selects the noise blanker
(NB) or the crystal calibrator. The
latter feature is useful in receiver
servicing, as it provides a signal at the %
\- ' f b-
antenna input which will serve as a
reference.

(25) INDICATORS (PROC, ATT, MARK, EXT, KEY PLUG CONNECTIONS

INT, MR, M)
These indicators show the operating condition for
the speech processor (PROC), the 20 dB attenuator
(ATT), the crystal calibrator (MARK), external or
intemal VFO (EXT, INT), and the memory system
k. M).

(26) METER SWITCH

This switch selects meter indication of Vcc, Ic,
ALC, compression (COMP), forward relative
power (FWD),and reflected relative power (REF).

(27) METER
The meter will display transceiver operating con-
ditions, according t o the setting of the meter
switch.

HEADPHONE CONNECTIONS
 GENERAL

REAR PANEL CONNECTIONS

( l ) ANT ( 8 ) EXTVFO
This is a:standard UHF type female jack for con- This is a 6 pin DIN jack for interconnection to the
nection t o the antenna. FV-107 external VFO.

< (2) GND (9) RCVANT

For best performance and safety, a good ground This jack pmvides for connection of an extemal
should be connected at this point. receiver to the main station antenna. This jack is
switched to the antenna in the receive mode only.
( 3 ) RFOUT
This jack provides 300 mV RMS at 50 ohms for ( l O) PATCH
connection t o the FTV-I 07R transverter. This is an auxiliary microphone input for use with
a phone patch, etc.
(4) AF OUT
This is an audio output jack, providing 200 mV of
audio output for recording purposes. This jack is
not disabled by insertion of a headphone or
( l l ) I F OUT 1
This jack provides narrow-band I F output for use
I
speaker plug into their respective jacks. with a monitorscope (such as the YO-901).

( 5 ) IF OUT 2 (1 2) FSK
This jack provides input for the FSK keying lead
I
This is wideband I F output for use with a band
scope (such as the YO-901). from your FSK terminal. The standard shift of
170 Hz is used.
(6) PTT
(13) ACC 1
This jack accepts push-to-talk control. When using
a footswitch, it should be connected a t this point. This is a 5 pin DIN jack for connection t o a linear
c amplifier or other station equipment. Included are
(7) ACC 2 make and break relay connections, as we11 as the
external ALC line.
This is a 7 pin DIN jack for use with the FTV-
107R transverter.
GENERAL

(14) +8 V
This is a +8 volt DC line for connection to the
FC-107 antenna tuner meter lamp. PIN No.
I -ALC IN
(
(1 5) BU (BACKUP) 2 GND

This jack is for connection t o an extemal +3 VDC 3 TX GNO

power source, in order to hold the FT-107M 4 GND

memory circuits when the transceiver is tumed off. 5 RX GND

ACC 1 PLUG CONNECTIONS

This is a miniature phone jack for connection t o an (FOR LINEAR AMPLIFIER)
extemal speaker. Insertion of a plug into this jack
automatically cuts off the intemal speaker.
PIN No.
( l7) KEY 1 CONTROL
Your key plug may be inserted at this point. Key- 2 13.5V
u p voltage is 7 volts, while key down current is 3 BV
1.5 mA. 4 CONTROL
5 13.5V
( l 8) DELAY 6 RX GND

This control vanes the receiver recovery time 7 TX GND

constant for the VOX circuitry. ACC 2 PLUG CONNECTIONS

(FOR FTV-107R TRANSVERTER)
(19) DC 13.5 V
The DC cable should be connected at this point.
Never connect AC power t o the DC cable. Failure I E X T VFO I N
t o observe this simple precaution will void the 2 GND
warranty..During AC operation with the FP-107, 3 E X T BV
insert the DC dumniy plug (supplied with the AC
power supply) into this jack. 5 13.5V
6 BV
(20) AC
EXT VFO PLUG CONNECTIONS
When using the internat FP-107 AC power supply (FOR FV-107 EXTERNAL VFO)
option, the AC cord is connected at this point.
Be certain t o observe the proper voltage when
using the FP-107.

(21) FUSE
When using the FP-107 AC power supply, the AC
line fuse is inserted a t this point. For 100/1 10/117
VAC, use only a 10 amp fuse, and for 200/220/
234 VAC, use only a 5 amp fuse.

MICROPHONE PLUG
 GENERAL

RECOMMENDED ACCESSORIES

( FV-107 EXTERNAL VFO FTV-107R VHFIUHF TRANSVERTER

The FV-l07 is a solid state remote VFO for the The FVT-lO7R is an all-new transverter for the
FT-107M senes of HF transceivers. Featuring a FT-107M senes, capable of operation on the 50,
precision'analog dia1 coupled to a high quality gear 144, and 430 MHz bands. The basic unit comes
mechanism, the FV-107 includes clanfiers for the equipped with all control circuitry, and the
transmit, receive, or transceive frequency, allowing 430 MHz and either the 50 MHz or 144 MHz unit
offset of i 2.5 kHz from the dia1 frequency. may be installed as options (in the USA, the
144 MHz unit is built in). Power input is 20 watts
As many as six crystal-controlled channels may be DC on all bands.
installed, for fixed, channel operation (crystals
optional). Selection of VFO or crystal operation For satellite operators, three satellite bands are
is made by a convenient switch on the front panel provided, allowing full duplex operation through
of the FV-107. All power required by the FV-107 the transverter, using an extemal receiver in
is provided by the FT-107M transceiver. addition to the FT-107M. The operator may trans-
mit on 145 MHz while listening on 29 MHz or
435 MHz, o r transmit on 435 MHz while listening
on 145 MHz.

The FTV-I07R includes repeater split on all

repeater bands within its operating range, for
operation on the many SSB repeaters that are
emerging. Fully solid state, the FTV-107R includes
protection for the final amplifier transistors against
damage caused by high SWR. Spunous radiation is
at least 6 0 dB down.
SP-107P PHONE PATCHISPEAKER

Tlie ' SP-107P featuriiig a sliaped-response loud-

speaker, and the hybrid phoiie patch allows easy,
effiiient operation during patches. Styling and
size matcli the rest of tlie FT-107 series.

FC-107 ANTENNA COUPLER

Preseiit a 50 olim load for your FT-107M trans-

ceiver all across the band with FC-107 alitenna
coupler. You may select three coax-fed and 1
random wire antenna. Included are an SWR bridge
and power output meter. Maximum power handl-
ing capability is 250 watts.

FP-107E EXTERNAL POWER SUPPLY

The FP-107E is an external power supply allowing

operation from AC supply voltages of 100/110/
1 17/200/220/234 volts, 50160 Hz.
Excellent regulation and conservative design assure
the owner of many years of trouble free operation.
 GENERAL

MICROPHONE CONNECTIONS

YM-34 MICROPHONE CONNECTIONS

l GRAY ,I

Y M-35 YM-35 MICROPHONE CONNECTIONS

l

Y M-36
YM-36 MICROPHONE CONNECTIONS I

d!": YM-37 MICROPHONE CONNECTIONS

HF ANT l

Telephone Line
 GENERAL

INSTALLATION: F T - 1 0 7 ' M
The FT-107M is designed to be a single-unit trans- supply/speaker console provide this voltage with
ceiver for top-performance base station or mobile excellent regulation. These options are available
C operation. For operation from AC mains, the from your Yaesu dealer..
optional FP-107 intemal power supply or FP-107E
externa1 power supplylspeaker are available from Before attempting operation of the FP-107 or FP-
your Yaesu dealer. Please read the following sec- 107E from AC mains, check t o see that the voltage
tions carefully, so as t o understand the important specification on the rear of the s q p l y matches
steps required for a successful installation. your local supply voltage. This inspection must be
made before applying power t o the equipment.

PRELIMINARY INSPECTION WARNING

Upori opening the packing carton, immediately Operation of the FT-107M directly from AC
give the transceiver a thorough visual inspection. mains, from improper DC voltages, or with an
Check t o see that the controls and switches are all improper fuse shall void the warranty on this
working freely, and inspect the cabinet for any equipment. Likewise, operation of the FP-107
sigiis of damage. If any dainage has been sustained, or FP-107E from improper voltages or iise of
contact the shipping company immediately, and an improper fuse shall void the warranty.
ddcument the damage completely. Save the pack-
ing carton and foam packing material for possible Please refer to the power transfornler primary con-
use at a later date. nectioii chart when changing supply voltages.

The transceiver should be connected t o a good

BASE STATION INSTALLATION earth ground. The ground lead should be made of
C a heavy, braided wire, and. should be connected t o
The FT-107M requires a power supply of 13.5 VDC the GND terminal on the rear apron of the trans-

t
,IIi
at 20 amps for proper operation. The FP-1 07 inter- ceiver. The ground wire connection to the station
nal power supply and FP-107E extemal power ground bus should not be longer than 10 feet.

+ 100
110

+
PT I
AC AC AC AC
200V 117V llOV IOOV

Fp-1071 FP-107EPOWER TRANSFORMER PRIMARY CONNECTIONS

(Refer t o FP-107ElFP-107 Installation on page 5 8 f o r details.)

GENERAL

MOBILE INSTALLATION

The FT-107M is designed for operation from 13.5 Before connecting the DC power cable t o the trans-
volts DC, a t 20 amps maximum current on voice ceiver, check the battery voltage with the engine
peaks. As such,it provides exceptional performance mnning (battery charging). If the voltage exceeds (
as a mobile station. The DC cable is a standard 1 5 volts DC, the vehicle voltage regulator should be
accessory for the FT-I07M. adjusted, so as t o limit the maximum charging volt-
age t o less than 15 VDC. As well, d o not operate
For under-dash mounting, a special mobile mount- the transceiver if the DC supply falls below 12
ing bracket is available from your Yaesu dealer. volts. The transceiver should always be tumed off
The FT-107M should be located away from heater when the car is started, t o prevent voltage transients
ducts, and a minimum of two inches of air space from possibly causing damage to the transistor
on all sides is recommended, in order to allow circuits of the radio.
proper air flow around the cabinet. Especially
critical is the area around the heat sink fan ex- ANTENNA CONSIDERATIONS
haust port.
The FT-I07M is designed for use into a 50 ohm
The DC cable comes equipped with a 20 amp fuse resistive load. While minor deviations from the
in thé positive line. Use only a 20 amp fuse in this 5 0 ohm figure are of n o consequence, the auto- (
socket. matic fmal protection (AFP) circuitry will reduce
the power output if high SWR conditions are
When making battery connections, be absolutely encountered.
certain t o observe the proper polarity of the supply
voltage. cohnect the RED cable lead t o the POSI- However, your FT-107M AFP circuitry and final
TIVE battery terminal, and connect the BLACK amplifier components are tolerant of the minor
SWR conditions present in many amateur instal-
lead t o the NEGATIVE battery terminal. Reversed
connections could cause permanent damage t o the lations. At an SWR of 3:1, for example, 75% of
full rated output power will be obtained.
transceiver
The Yaesu RSL senes of mobile antennas is avail-
CAUTION
able from yourYaesudealer,fok mobile installations.
OUR WARRANTY DOES NOT COVER
DAMAGE CAUSED BY IMPROPER SUPPLY
CONNECTIONS NOR DAMAGE CAUSED
BY USE O F AN IMPROPER FUSE.

It is recommended that the power connections be

made directly t o the battery, instead of t o the
ignition switch, etc. The battery provides consider-
able filtering action against ignition noise, while
connection t o the ignition switch can place the
power line in a noisy circuit. Keep the power cable
as short as possible, and keep the lead away from
ignition cables.

WARNING
Permanent damage will occur if reversed
supply polarity voltage is applied t o this trans-
ceiver. Our warranty does not cover damage
caused by reversed supply polarity.
1
 GENERAL

DIAL CALIBRATION

The FT-107M digital display is a true frequency

counter, so n o calibration is required. When
changing sidebands, the digital display will also - - - - D n =
PIIDCPITMaFIXEXT INT Mil M
change 3 kHz.

Analog Dia1 Calibration

SSB

( I ) Set the MODE switch to the desired mode,

USB or LSB.

(2) Set the NBIMARK switch to MARK.

(3) Rotate the VFO dia1 t o the nearest 25 kHz

point, as indicated on the digital display. Now
( , align the analog dia1 skirt so that the bold
calibration marking on the skirt is aligned
, with the vertical calibration point on the
subdial window.

( BOTTOM PANEL FEET

The feet o n the bottom panel may be changed, if

it is desired t o change the viewing angle for the
VFO. In the accessory kit for your FT-I07M, there
are two extender feet with mounting pads. These
may be installed either in front or in back, accord-
ing to the requirements of your station. Refer to
( the drawing for mounting details.
GENERAL

OPERATION
The tuning procedure for this transceiver is not BAND . . . . . . . . . . . . . . . . . . . Desired band
complicated. However, care must be exercised RXCLAR . . . . . . . . . . . . . . . . . . . . . . O F F
when operating this equipment so that peak CLARIFIER .......... 12 o'clock position f
performance is obtained. The following paragraphs M FINE ............. 12 o'clock position
describe the procedure for operating the FT-I 07M. ATT . . . . . . . . . . . . . . . . . . . . . . . . . . O F F
APFINOTCH switch. . . . . . . . . . . . . . . O F F
AGC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F
INITIAL CHECK NB/MARK switch . . . . . . . . . . . . . . . . O F F
METER . . . . . . . . . . . . . . . . . . . . . . . . VCC
Before connecting the transceiver t o the DC power
source, be certaiii that a fuse o f the proper rating (2) Tum the POWER switch ON. The nieter lamp
is iii use. When iising the FP-107 or FP-l07E AC and digital display will becoine illuii~inated.
Power Supply, be certain that the voltage specifi- The meter needle should deflect to within the
cation for the power supply matches your local AC VCC range at the right side of the meter scale.
supply voltage.
(3) Adjust the A F GAIN control for a conifort-
able listening level. There is no "preselector" t'
FREQUENCY SELECTION o r other peaking required for this receiver,
because the preselector networks are all
Frequency selection on the FT-107M is by means preset.
of a digital as well as an analog display. The digital
display reads the true frequency, with accounting (4) When pulse-type noise is encountered, t u m
for the carrier frequency. Therefore, n o recali- the NB switch ON. Now, rotate the control
bration of the display is necessary when changuig clockwise until the noise pulses are elimi-
modes. The calibrator is chiefly useful for making nated. The best setting of the blanker for (
receiver adjustments. overall receiver performance is one tliat just
eliminates the noise pulses, without being
The digital display allows resolution t o 100 Hz, advanced too far. No noise blanker will
while the- analog skirt on the main dial allows eliminate all types of noise, but the FT-107M
1 kHz. One revolution of the main tuning dial blanker is a ,state of the art design that
corresponds t o a frequency change of 25 kHz. provides significantly improved blanking
The marker signal may be used t o set the 5 kHz capability over earlier designs.
marking of the analog dial skirt. t
(5) For varying the width of the I F passband,
A further coarse frequency determination may be rotate the width control. In the IF, two
made through the main dial window, which 8-pole crystal filters are used. One filter i s
contains a subdial calibrated every 5 0 kHz. fixed, and presents a boundary for the band-
width. The center frequency of the IF is then
RECEIVE OPERATION varied across the passband nf thc scsnnd
( l ) Connect a 50 ohm antenna t o the rear panel filter, using a mixing technique that results in
ANT jack. Preset the controls and switches as no change of pitch on the received signal.
follows:
The result is continuously variable bandwidth,
POWER . . . . . . . . . . . . . . . . . . . . . . . . O F F from 2.4 kHz down t o approximately 300 Hz.
VDX GAIN . . . . . . . . . . . . . . . . . . . . . .PTT This system is highly effective in eliminating
NB . . . . . . . . . . . . . . Fully counterclockwise high-pitched "buckshot" on SSB, as well
MODE . . . . . . . . . . . . . . . . . . Desired mode as interfenng CW signals. (
WIDTH . . . . . . . . . . . . . . . 1 2 o'clock position
A F GAIN . Adjust later for comfortable level The WIDTH system is defeated during AM
RF CAIN . . . . . . . . . . . . . . . Fully clockwise operation, and the received signal bypasses
APFINOTCH knob ... 12 o'clock position the second I F filter.
 GENERAL

( 6 ) Under conditions of very heavy QRM, while TRANSMITTER OPERATION

operating CW, the APF (Audio Peak Filter)
may be activated. Switch the APFINOTCH The FT-I07M transmitter is extremely easy to use,
lever t o APF, and tune the APFINOTCH requiring only presetting of the controls and
c control for maximum enhancement of the switches. No tuning procedure, other than an
initial setting of the mic gain and RF processor
desired signal. The operator will observe that
the background noise will be reduced level, is required.
draniatically, resulting in excellent signal to
noise ratio. When transmitting, it is important that you always
have a dummy load or matched antenna connected
(7) For elimination of an interfering carrier to the antenna jack. The automatic final protection
witliin the A F passband, set the APFINOTCH unit will reduce power if an improper load is
switch t o NOTCH. Then rotate the APF/ connected.
NOTCH coiitrol carefully for the best nulling When transmitting, never change the position of
of the offending carrier. The notch is the MODE, BAND, nor the SELECT switch. It
extremely sharp, so tuning is critical, but the is possible for the final amplifier transistors to be
excellent notch depth is extremely effective damaged by transients generated by this kind of
in elimiilating interference.
abuse. Please follow this simple precaution without
The S-meter still indicates the interfering
fail.
' carrier strength regardless of notching, be-
cause the notching action is done in the audio The FT-107M contains a heat-sensing protection
stage. circuit for the final amplifier. Do not transmit at
full power (e.g. key-down CW) for more than 3 0
seconds. If you have keyed down for a 3 0
(8) The RX CLARIFIER may be used if secoiid period, we recommend two minutes of
the incoming signal is drifting. Press standby operation t o allow the final transistors to
the RX CLAR button, and rotate the recover to normal operating temperature.
f CLARIFIER control, to activate the receiver
offset tuning. The TX button may be pushed The following paragraphs describe transmitter
to allow offset of the transmit frequency, and operation. If our guidelines are followed, the FT-
bot11 the TX and RX buttons may be pushed 107M will provide many years of trouble-free
together to allow offsetting of the transceive operation.
frequency from the dial frequency.

(9) AGC time constant setting may be ac- PRELIMINARY CaECKS

( complished by setting the AGC switch for the
desired recovery time, slow or fast. The AGC (1) Preset the controls and switches as follows:
systeni may also be defeated by setting this VOX GAIN . . . . . . . . . . . . . . . PTT position
switch to OFF. FWD SET . . . . . . . . . . . . 12 o'clock position
MIC GAIN . . . . . . . . Fully counterclockwise
(10) For extremely strong signals, a 20 dB attenu- DRIVE ........... Fully counterciockwise
ator may switched into the incoming receive COMP . . . . . . . . . . . . Fully counterclockwise
line. Set the ATT switch t o ON for this MODE . . . . . . . . . . . . . . . . . . . . . . . . . . FSK
purpose. DIAL . . . . . . . . . . . . . . . . Desired frequency
BAND . . . . . . . . . . . . . . . . . . . Desired band
S E L E C l . . . . . . . . . . . . . . . . . . . . . . . . VFO
T X C L A R . . . . . . . . . . . . . . . . . . . . . . . OFF
PROC.. . . . . . . . . . . . . . . . . . . . . . . . . OFF
METER switch . . . . . . . . . . . . . . . . . . . . . IC

(2) Connect a matched antenna to the antenna .

jack.

(3) Set the VOX GAIN control to MOX.

GENERAL

(4) Advance the DRIVE control so that the 1C the COMP control to the 10 o'clock position,
reading on the meter reaches exactly 1 0 and adjust the DRIVE control so that the
amperes. ALC meter needle does not go beyond the
ALC range of the meter. Now adjust the
(5) Set the METER switch to FWD, and adjust COMP control with the meter switch set to (
the FWD SET control so that the meter COMP; the meter should indicate between 5
needle is aligned with the FWD SET position and 10 on the COMP scale during voice peak
on the meter scale. coiiditions.

(6) Set the METER switch to REF. The meter

needle should be within the REF scale area
for full power operation. The REF area
While some initial adjustment of the MIC
GAIN, COMP, and DRIVE control may be
required, be careful not to overdive the trans-
I
covers SWR readings of up t o 2 : 1, the area mitter, for best spectral purity. hen speak-
which will result in essentially n o reduction ing into the microphone in a long syllable
in power output. If the needle rests above (such as the word "four"), do not advance
the REF area, remedial work on your antenna the DRIVE control beyond the point where
system may be in order. Alternatively, the the IC or forward power reading ceases to.
FC-107 Antenna Coupler may be used to increase
provide a 50 ohm load for your transceiver.
(5) T o set the VOX circuitry, advance the VOX
(7). For the above test procedure, please be sure GAIN control on the front panel so that your
to check the frequency before transrnitting. voice activates the transmitter. The rear panel
Also, use the minimum power necessary to DELAY control will allow the operator to set
obtain a full scale reading on the FWD SET the VOX time constant for the desired hang
step. If less than 10 amps of 1C will provide time after you have finished speaking. The
this reading, by all means use the lower power ANTITRIP control, VR4003, is located on the
level. IF Unit, and it may be adjusted as necessary (
to prevent the speaker output from activating
the VOX. Do not use more VOX GAIN nor
SSB OPERATION ANTITRIP than necessary.

(1) Connect your microphone to the front panel

MIC jack. CW OPERATION

(2) Preset the controls and switches as follows: ( l ) Insert your key plug into the rear panel KEY
MODE . . . . . . . . Desired mode, LSB or USB jack. Key u p voltage is 7 VDC, and key-down
METER switch . . . . . . . . . . . . . . . . . . . ALC current is 1.5 mA, so most all electronic
MIC GAIN . . . . . . . . . . . 1 0 o'clock position keyers will work without modification with
DRIVE . . . . . . . . . . . . . . . Set for full output the FT-107M.

(3) Close the microphone PTT switch, and speak (2) If you use a footwitch, connect its plug to
into the microphone in a normal voice. Adjust the rear apron PTT jack.
the MIC GAIN control so that the ALC meter
needle does not go beyond the ALC range of (3) Set the MODE switch t o CW-W or CW-N, and
the meter. With the meter switch set to IC, set the VOX GAIN control t o PTT.
the reading on voice peaks will be roughly
Samps, or about 113 to 112 of the full power (4) Activate the transmitter (close the footswitch
single-tone meter reading. or set the VOX GAIN control to MOX), and
go key down. Adjust the DRIVE control f o r t
(4) T o adjust the R F speech processor, place the the desired power input, up to a maximum
PROC switch ON. Speak into the microphone reading of about 18A on the IC meter.
in a normal voice, and d o not change the MIC
CAIN setting performed in step (3). Advance
 ( 5 ) For semi-break-in operation, advance the SELECT SWITCHESIMEMORY OPERATION
VOX GAIN control to the point where the
VOX relay is activated by the sidetone audio (Note: The memory unit is an available option
signal. The DELAY control, located on the for the FT-I07M)
rear panel, may be adjusted to control the
VOX relay hang time. Frequency control on the FT-107M is by means of
the internal VFO, the memory and DMS circuitry,
(6) For QRP operation, reduce the level set by an external VFO (such as the FV-107), or vanous
the DRIVE control. The power output may combinations of the three. The SELECT switch
be reduced t o O watts, if desired. will determine the circuitry in control of each
mode, and the selection procedure is descnbed
FSK OPERATION below:
VFO This positioii selects TX/RX oper-
The FT-107M is designed for 170 Hz FSK oper- ation on the FT-107M internal
ation. VFO.
MR This position selects TX/RX oper-
( l ) Connect tlie lead from your terminal unit to ation on the FT-107M memory
the rear panel FSK jack.
f system.
(2) Set the MODE switch t o FSK, and set the RX MR This position selects RX operation
VOX GAIN control t o MOX. Advance the on the ineniory, with TX operation
DRIVE control for a reading of 5 anips on on tlie FT-107M internal VFO.
tlie 1C meter. Do not operate the FT-107M TX MR This operation selects TX operation
oii FSK a t the same power levels as stipulated oii the memory, with RX operation
in the sections regarding SSB and CW oper- on the FT-107M internal VFO.
ation EXT This position selects TX/RX oper-
ation on the FV-107 extemal VFO.
(3) The keying signal from your terminal will
now activate the FT-I07M transmitter. When RX EXT This position selects RX operation
using the optional CW filter, the CW filter on the FV-107, with TX operation
wili automatically be selected dunng FSK on the FT-I07M internal VFO.
operation. TX EXT This position selects TX operation
on the FV-107, with RX operation
AM OPERATION on the FT-107M internal VFO.

(1) Set the MODE switch t o AM, the METER In addition, changing of and offset from memory
switch to ]C, and rotate the MIG GAIN alid channels is controlled from the front panel. The
DRIVE controls fully counterclockwise. controls of interest are as follows:
M This button is used t o store a fre-
(2) Close the microphone PTT switch, and ad= quency in memory.
vcliice the DRIVE control until the reading M SFT This button activates the DMS cir-
on the IC meter reaches S amps. cuit.
RX CLAR This button selects offset tuning of
(3) Speak into the microphone in a normal voice,
alid advance the MIC GAIN control until a the receive frequency during VFO
slight downward deflection of the IC meter or mernory operation.
is noted on voice peaks. Do not advance the TX CLAR This button selects offset tuning of
MIC CAIN control too far, as any excess the transmit frequency during VFO
c energy above that required for full modu- or memory operation.
lation will be wasted in spurious emissions. T/R CLAR When both buttons are pushed, off-
set tuning of the transceive fre-
(4) In the AM mode, the R F speech processor .quency is provided.
and variable I F bandwidth control are not
usable. 1-19
GENERAL

M FINE The memory fine tuning control If DXIDX starts t o drift, press the RX CLAR
provides a very fine tuning adjust- button, and usc the clarifier. Alternatively,
ment for memory channels. The for slight dnfting, use the M FINE control.
available offset range is approxi- If DXIDX decides to QSY 10 kHz, press the
mately 500 Hz, making this con- M SFT button, and rotate the M SFT control f 1
tro1 ideal for tuning between the to the new frequency (e.g. 7080 kHz). The
100 Hz DMS steps. M SFT control will not affect the transrnit
M SFT The Digital Memory Shift (DMS) frequency, because the SELECT switch is
(knob) circuitry is controlled by the M set t o RX MR, and control of the transmit
SFT knob. When a memory channel frequency is by the VFO.
is programmed, and the M SFT
button is pushed, the memory fre- (3) You find DXIDX oii 21270 kHz, working
quency can be shifted up or down stations by order of call area. You also find
in 100 Hz steps, up t o and slightly DXOAA on 14145 kHz, listening oii 14205
beyond the 500 kHz limits of the kHz, also by call area. The meinory and no
normal VFO range. tune-up capability make this situation easy
M CH The memory channel selector t o cover.
chooses the desired memory clian- ( L

nel. First, tuiie t o 21 270 kHz oii the VFO. set the
M CH switch t o 1, and press M. Now. set the
handswitch t o 1 4 MHz, and the dia1 to 14145
TYPICAL MEMORY OPERATION kHz. Set the M CH switch t o 2. aiid press M.
Now movc the main dial t o 14205 kHz.
0peration:of the meinory system and DMS circuit-
ry is perhaps best described by the use of several To check DXgAA's frequency (14145 kHz),
examples. Following the exainples, soine advanced set the SELECT switch to RX MR. To check
programming techniques will be discussed. DXIDX's frequency, set the bandswitch t o t
21 MHz and the M CH switch t o 1. If DXl DX
(1) You are operatiiig on a net on 3970 kHz and is acknowledging your call area, set the
must QSY down 10 kHz t o handle a piece of SELECT switch t o M R and call him. To re-
traffic. With the SELECT switch set to VFO, check DXOAA, set the bandswitch t o 14 MHz,
set the main tuning dia1 t o 3970 kHz. Press and the M CH switch t o 2. If DXOAA is listen-
M t o memorize 3970 kHz in the desired ing for your call area, switch t o RX MR for
memory channel. Now move the main dial RX on 14145 Hz and TX on 14205 kHz.
down to 3960 kHz t o handle the message.
When finished, set the SELECT switch t o MR
Because there is no "preselector tuning" con-
trol, nor any transmitter peaking whatsoever,
<
for instant return t o 3970 kHz, the net fre- it may be seen that several stations on differ-
quency. For retum t o 3 9 6 0 kHz, again select ent bands may be checked in a niatter ~f
VFO. qeconds, without toucliing a VFO dial.

(2) You are operating split frequency on 40meter

phone, and you hear DXIDX on7090 kHz,
listening for calls on 7205 kHz. With the
SELECT switch on VFO, tune t o 7090 kHz,
and press M t o store that frequency in chan-
nel 1. Now t u m the main dial t o 7205 kHz,
and set the SELECT switch to RX MR; you
will now be listening on 7090 kHz, while
transmitting on 7205 kHz. To listen t o the
pile-up o f stations o n 7205 kHz calling
DXIDX, set the SELECT switch t o VFO;
you will now be listening on 7205 kHz.
 GENERAL

N M E S ON DMS OPERATION Tune the maiii dial to 14195 kHz, set the M CH
switch t o 1, and push M. Now set the SELECT
The DMS control will allow offsetting of the switch t o RX MR, and press the M SFT button.
meniory frequency in 100 Hz steps. Every several Rotate the M SFT knob until you find-the station
steps. however, a slight momentary "chirp" in the DXOAA is working on 14225 kHz (check the trans-
memory frequency may be observed. This is caused mit frequency of DXQAA instantly by switching
by a relocking of the memory circuitry during shift the SELECT switch t o VFO t o follow the calling
operation, and it is entirely normal. The "chirp" sequence). Now set the M CH switch t o 2, and
lasts only a small fraction o f a second, and no fre- press M. If the next QSO is with a station .on
queiicy stability whatsoever will result on tliat 14230 kHz, rotate the M SFT knob again t o that
.z step". The design technique that produces the frequency, set the M CH switch t o 3, and press
briel' "cliirp" also ensures cleaii local oscillator M. Follow this sequence until you have DXgAA's
operation, important for good dynamic range of favored listening frequencies in meniory. Now you
tlie receiver. can switch to TX MR, tum M SFT OFF. and
select the memory channel corresponding to the
Wlieii you turn on the M SFT buttoii, perform a most likely listening frequency for DXgAA, be-
sliiTt ~isiiigthe IL1 SFT knob, then tuni the M SFT cause 14225 kHz, 14230 kHz, 14235 kHz, etc.
huttoii OFF, the memory will return t o the will all have been stored in successive nieniory
original ineinory frequency. Howevcr, wlien you channels. Use the traiismit clarifier, if desired,
INISII the M SFT buttoii on again, you will not t o make a minor change in a frequeiicy.
rrpirii to the previous sliift frequeiicy; you will
start oii the oripiiial riieinory frequency, and a You riiay coiitinue t o shift off of any ineinory
iiew sliift must be prograinmed. An alternative cliaiinel, and use it t o program a new memory
soliitioii is sliown in the "Advanced Programrning channel, up t o the limit of 12 total memory
of Memory Chaiinels" sectioii, below. channels. This teclinique can also be used t o
advantage when operating ou a uet, if you
( Wlicii usiiip the M SFT control, it will frequeiitly want to store and check several frequeiicies
be useful t o use the M FINE control for tuning witliout leaving the net frequency (on the VFO).
betweeii the 100 Hz steps, especially on CW. The
M FINE control should, otlierwise, be set t o the
l I o'clock position. Wheii a frequency is stored SCANNING OPERATION WITH YM-35 MICRO-
iii nieniory. theii recalled, tlie M FINE control PHONE (OPTION)
sliifts the inemory frequency based on the position
of tlie M FINE control at tlie time of frequency The YM-35 scanning microphone (option) can be
( entry. Therefore, one can see that the offset used t o provide up/down scanning, as well as
capability of tlie M FINE control will be reduced scanning speed control, for coiivenient operation.
i i i 1 is iiot preset t o the 1 2 o'clock position. The YM-35 can only be used with a memory-
equipped FT-107M, because it depends on the
memory system for its scanning capability.
ADVANCED PROGRAMMING O F MEMORY
CHANNELS First, program any meniory frequency as a starting
poiiit. Now set the M SET button t o ON, and press
The parallel storage systeiii used in. the FT-107M the UP or DN scanning button on the YM-35. For
niemory allows a degree of flexibility not found in as long as you hold the UP or DN switch down,
other nieniory systems: the ability t o program a scanning will occur. Release the scanning switch t o
new memory frequency having shifted an earlier stop tlie scan.
memory frequency. An exaiilple will show how
this teclinique can be used t o good advantage. To activate the fast scanning feature, press both
the UP or DN switch and the FAST switch. Release
t Let us say that DXgAA is traiisiiiitting on 14195 both switches for stopping of the scan.
kHz, tuning between 14225 and 14250 kHz;
watchiiig DXgAA's operating practice, you notice
that he listens for stations at 5 kHz intervals with-
in the above range. Here's how t o proceed: