Yaesu FT-107M User Manual

MAINTENANCE

SERVICE MANUAL

FT-

107M

YAESU MUSEN CO., LTD.

C.P.O. BOX
TOKYO. JAPAN

YAESU ELECTRONICS CORP.

P.O. BOX

PARAMOUNT, CALIFORNIA,

1500

49

90723

SECTION

1-

GENERAL

GENERAL DESCRIPmON
SPECIFICATIONS
SEMICONDUCTORS
FRONT
RECOMMENDED ACCESSORIES
MICROPHONE CONNECTIONS
INTERCONNECTIONS
INSTALLATION: FT-107M

r

;

OPERATION

PANEL

..............................................................

............................................................

CONTROLS

.................................................................

.......................................................

'AND

SWITCHES

.....................................

.................................................

.................................................

.........................................................

.....................................................

1-1
1-2
1-3

1.4

1.9

1.11
1-12
1-13
1-16

YAESU

C

ALL SOLID

STATE

FT-107

HF

SSB

M

TRANSCEIVER

GENERAL DESCRIPTION

The FT-IO7M is a precision-engineered, high­perfomance HF transceiver of advanced design,
featuring al1 band coverage (160-10 meters) on

CW,.AM, and FSK. This transceiver operates

SSB,
at an input power of 240 watts on SSB/CW, and
80 watts on

The all-solid-state design aiiows instant band

C

changes, without so much as a preselector adjust­ment. Digital plus analog frequency display is used
in this transceiver, with an advanced LSI frequency

counter providing accurate frequency

without calibration when switchiig modes.

an

RF speech processor, and a built-in SWR meter

are included

Yaesu's exciting memory circuitry is available as
option, providing up
quency memory, with clarifier adjustment allowing from the feature-packed FT-107M.
offset from memory channels. And Yaesu's new
Digital Memory Shift
offset from any memory channel, in 100 Hz steps

C

'

programmed by a photo-interrupter control. When
the memory option is installed, an
ning microphone may be used to
scanning with fingertip ease, using pushbuttons on
the microphone.

AMIFSK.

for.maximum versatility.

to

twelve channels of fre-

(DMS) aiiows up to 500 kHz

provide up/down

readout

VOX,

an

optional scan-

The FT-107M receiver section features a Schottky
diode ring mixer, plus individually-tuned input
bandpass filter networks, for excellent intercept
characteristics. An audio
included, in addition to Yaesu's variable IF band­width feature, which uses two 8-pole filters to
provide continuously variable width of the IF

passband from 300 Hz to

Designed for operation from a 13.5

FT-IO7M may be used with either the FP-107

the
intemal AC power supply or the FP-107E externa1
AC power
will provide excellent regulation, for many years
of

satisfying opeiation.

We recommend that you read the following pages
carefully, so as to derive maximum enjoyment

supply/speaker console. Either supply

peaklnotch filter is also

2.4

kHz.

VDC

supply,

SPECIFICATIONS

GENERAL

Frequency coverage:

160m 1.8 - 2.0 MHz

80

m

40 m

30 m
20 m

17

m

1Sm 21.0 - 21.5 MHz
12m 24.5 - 25.0 MHz
10

m

Power requirements:

DC 13.5 volts t 10

Power consumption:

DC 1.5 amps receive

20 amps transmit

sie:

334

(W)

including heat sink

Weigh t:

Approx. 12.5

3.5 - 4.0 MHz

7.0 - 7.5 MHz

10.0 - 10.5 MHz

14.0 - 14.5 MHz

18.0 - 18.5 MHz

28.0 - 29.9 MHz

x

129 (H) x 400

kg.

%

(D.)

mm

Transmitter frequency stabiiity:

+300 Hz after 10 minute warmup; less than

100 Hz after 300 minute warmup

Modulation type:

A3J : balanced modulator
A3

:

amplitude modulation of a low power
stage

FSK shift: 170 Hz

Antenna output impedance:

50 ohms, unbalanced

Microphone input impedance:

500-600 ohms (low impedance)

RECEIVER

Sensitivity

Image rejection:

:

0.25 pV for S/N 10 dB (SSB,
i.OpV for SIN 10 dB (AM)

Better than 60
Better than 50 dB (10 m)

dB

(160-12

m)

CW,

FSK)

(

Emission type:

LSB, USB(A3J), CW(Al), AM(A3), FSK(F1)

Power input:

240 watts DC (SSB, CW)

80 watts DC

Canier suppression:

Better than 40 dB at 14 MHz

Unwanted sideband suppression:

Better than 50 dB (14

Spurious radiation:

Better than 50 dB down

Transmitter frequency response:

350-2700 Hz (-6

Third

order distortion products:

Better than 3 1 dB down

(AM,

FSK)

MHz, 1 kHz)

dB)

IF

rejection:

Better than 70 dB

SSB 2.4 kHz at 6 dB down, 4.0

down

CW (with optional 600 Hz CW fiter)

600Hz at 6 dB down, 1.2 kHz at 60dB down

AM

(with optional 6 kHz

6

kHz at 6 d~ down, 12

RF

attenuator:

20dBi3dB

APF, Notch frequency response:

300 Hz to 1.4 kHz

Bandwidth control:

Continuous from 2.4 IcHz to 300 Hz

Audio output impedance:

4-16 ohms

AM

kHz

IcHz

at 60 dB

filter)

at 60 dB down

C

Negative feedback:

6 dB at 14 MHz

Audio output:

1-2

3

watts at 10 % THD, 4 ohm loa&

SEMICONDUCTORS

GENERAL

Transistor

2SC1674L
2SC1815GR
2SC1815Y
2SC1959Y
2SC2290

2SC233 1
2SC23 95
2SD235Y

MPS-A 13
2N4427

c

2SA564A
2SA733
2SA952L
2SC3 72Y
2SC38OY

(2SC3 80TM-Y)

2SC535A

2SC735Y
2SC1000GR
2SC1583
2SC1589

FET

2SK 19GR

IC LED

pPA54H 1 MSM9520RS 1
p PC3 24C 1 MC14011B 1
pPC2002H l MC14016P

TA7060P 1 NJM78L05 1
TA7063P 1 pPC14305 1
SN76514N

34024P

I

pPC14308 3

1

c

Specifications subject to change without notice

Germanium

1N270(GB) 18 IS1007(GB) 34

Silicon Diode

10D1
lOD10 4

Schottky Bamer Diode

1SS16 1

Varactor Diode

FC63

l S2209

Zener Diode

YZ-O33 1 WZ090

LN224RP 7 GD4203SRD

l LED Display

5082-7623 6

Diode

2

O

1
1

IS1555 148

l S7236

1

3

ACCESSORIES

The following accessones are included with your

FT-

107M

C

DC

Power cord
Speaker plug
RCA plug

fuse (20A)

DC
Extender legs I30

mm)

Pad for legs

CAUTION

WHEN REPLACING FUSES IN THE DC
CABLE, USE

ONLY A 20

AMPERE

OUR WARRANTY DOES NOT

DAMAGE CAUSED BY USE OF AN

<

'

PROPER FUSE. NEVER CONNEcT AC

POWER DIRECTLY TO THE REAR PANEL

DC POWER CONNECTOR.

FUSE.

COVER

IM-

FT-107

FEATURE FT-107M
ALL BAND CRYSTALS
MEMORY

CW FILTER
AM FILTER
RF SPEECH PROCESSOR

MICROPHONE ISTANDARDI

MICROPHONE
AC POWER SUPPLY

O

=

Standard feature

SERIES

UNITIDMS

(SCANNING]

X

MODEL

=

Availableoption

CHART

X

X

FRONT

This transceiver has been specifically designed for grade transceiver performance: Therefore, be
ease of operation. However, the operator may not

be familiar with the function of some of the con­trols, and improper adjustment thereof may de-

PANEL

CONTROLS

certain that you understand the function of every
control and switch before operating the FT-IO7M.

AND

SWITCHES

C

(l) FWDSET
This switch sets the SWR meter sensitivity level.

(2)

VOX-CAIN

This control selects MOX/PTT/VOX relay control,

we11 as adjustment of the VOX (voice-operated

as
TX/RX switching) circuit. The PTT position pro­vides push-tc-talk operation from a microphone
PTT switch or a footswitch. The MOX position
provides manual transmit; this switch must be
returned to the PTT position for receiver recovery.

-

(3) DRIVE
On CW, FSK, and

level. On SSB, with the
control sets the drive

(4)

MIC

GAIN

This control sets the
amplifier gain level.

(5)

POWER

This is the
transceiver.

AM,

this control sets the carrier

RF

processor ON, this

level.

'\

\

AM

and SSB microphone

main power on/off switch for the

(6)

MIC

This eight-pin connector accepts the microphone
andio input, as we11 as the push-to-talk (PTT)

and scanning control lines.

This control vanes the noise blanker threshold
level.

(8)

PHONES

This is a standard twc-pin phone jack for output to
your headphones. The impedance is 4 ohms, and

intemal speaker will

the
inserted into this jack.

(9)

COMP

This control sets the compression
speech processor.

(10)

MODE

This switch selects the
CW-W, CW-N, FSK, and
600

Hr

or 350
position
the CW-N position will use the
the

width feature.

1-4

will use the two 8-pole SSB filters, while

&pole SSB filter used for the variable band-

Hz

be

cut off when a plug

level for the RF

desired mode: LSB, USB,

AM.

When the optional

CW

filter is installed, the CW-W

6-pole

CW

t

c

is

C

filter and

GENERAL

(l

l) WIDTH

This control vanes the IF handwidth (except on
AM) from 2.4 kHz down to 600 Hz.

c

12) AF CAIN TX MR The transmit frequency is controlled

This control vanes the audio output level from the
speaker or headphones. Clockwise rotation in­creases the audio output level.

This control vanes the gain of the receiver RF and
IF

amplifiers. For proper S-meter operation, this

meter should be set

This control vanes the frequency response of the

audio

may be

(I
This is the

transceiver.

(16) ANALOG AND DIGITAL DISPLAYS

The analog display is
with 1 kHz marks providing finer resolution. The
digital display

(17) BAND
This switch selects the

peak/notch filter. The peak/notch filter

varied over the range 300 Hz-1400 Hz.

S)

MAIN TUNING KNOB

main frequency tuning dial for the

fully clockwise.

calibrated every 50 kHz,

provides resolution to 100 Hz.

desired band

RX MR

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

RX CLAR)

M Push the M button to store a fre-

M

SFT Push this switch to activate the.

TX

CLAR While using the internal VFO or

RX

CLAR) memory, push the TX CLAR switch to

(20) CLARIFIER
The CLARIFIER allows offset from the VFO

or memory frequency, according to the selection
made by
buttons.

The receive frequency is controlled by
the memory unit and/or DMS, while

the transmit frequency is controlled

by the intemal VFO.

by the memory unit and101 DMS,
while the receive frequency is

trolled by the internal VFO.

quency

DMS system.

provide offset from the TX frequency.

Push the RX CLAR button to
offset of the receive frequency, and
push both buttons to
of the transceive frequency from the

dial frequency.

pushing the TX CLAR and/or RX CLAR

in

memory.

provide offset

con-

provide

(l

8)

SELECT SWITCH

C

This switch selects the means of frequency control

for the transceiver. The
fully equipped FT-107M (DMS unit installed).

The transmit frequency is controlled
by the

(option), while the receive frequency
is controlled
VFO.

The ieceive frequency is controlled by

the FV-107

while the

trolled by the FT-107M internal VFO.

The transceive frequency is controlled

by the FV-107
The transceive frequency is controlled

by the memory unit
(Digital Memory Shift) control.

c

TX EXT

RX

EXT

EXT

I

M R

details below apply to the

FV-107 extemal VFO

by

the

FT-107M

external VFO (option),

transmit frequency is con-

external VFO (option)

and/or the DMS

internal

(21) M FINE
This control allows

operation.

(22) M SET
This control activates the DMS system,

offset tuning from a memory channel in 100 Hz
steps,

The

M

FINE control may, in

between the 100 Hz steps.

tune

(23) M CH
This control selects the

(24) LEVER SWITCHES
PROC

ATT This switch activates a 20 dB attenu-

This switch activates the RF speech
processor.

ator in the incoming signal path.

fme tuning dunng memory

allowing

tum,

be used to

desired memory channel.

APF/

This control selects either the Audio

Peak Filter (APF) or the audio notch
filter.

AGC

NB/MARK This switch selects the noise blanker

(25) INDICATORS (PROC, ATT, MARK,

INT, MR, M)

These indicators show the operating condition for
the speech processor (PROC), the
(ATT), the crystal calibrator (MARK),
intemal

k.

M).

(26) METER SWITCH

This switch selects meter indication of Vcc, Ic,

ALC, compression (COMP), forward relative
power

This switch selects the

time constant. Selection of slow, fast,
and AGC OFF is possible.

(NB) or the crystal calibrator. The

latter feature is useful in receiver
servicing, as it provides a signal at the
antenna input which will serve as a
reference.

VFO

(EXT,

(FWD),

INT), and the memory system

and reflected relative power

20

AGC

dB

recovery

EXT,

attenuator

external or

(REF).

01

KEY

PLUG

f'-%\

CONNECTIONS

b-

(27) METER

The meter will display transceiver operating con-

ditions, according to the setting

switch.

HEADPHONE CONNECTIONS

of

the meter

GENERAL

REAR

PANEL CONNECTIONS

(l)

ANT

This is

nection to the antenna.

<

(2) GND
For best performance and safety, a good ground

should be connected at this point.

(3)

This jack
connection to the FTV-I 07R transverter.

(4)

This is an audio output jack, providing 200 mV of

audio output for recording
not
speaker plug

(5)

This is wideband
scope (such as the YO-901).

a:standard UHF type female jack for con-

RFOUT

provides 300 mV

AF OUT

disabled by insertion of a headphone or

into their respective jacks.

IF OUT 2

IF output for use with a band

RMS

at 50 ohms for

purposes. This jack is

(8)

EXTVFO

6

This is a

FV-107

(9)

This

receiver to the main station antenna. This jack is
switched to the antenna in the receive mode

(l

O)

PATCH

is

This

a phone patch, etc.

(l l)

This jack provides narrow-band IF output for use
with a

(1

2)

FSK

This jack

from your FSK terminal. The standard shift of

Hz

170

pin DIN jack for interconnection to the

external VFO.

RCVANT

jack pmvides for connection of an extemal

only.

an auxiliary microphone input for use with

IF OUT 1

monitorscope (such as the YO-901).

provides input for the FSK keying lead

is used.

I

I

(6)

PTT

This jack accepts push-to-talk control. When using
a footswitch, it should be connected at this point.

c

(7) ACC 2
This is a 7 pin DIN jack for use with the

107R transverter.

FTV-

(13) ACC

This is a 5 pin DIN jack for connection to a linear

amplifier or other station equipment. Included are
make and break
external ALC line.

1

relay connections, as we11 as the

GENERAL

(14)

+8

V

This is a
FC-107 antenna

(1

5)

This jack is for connection to an extemal

+8 volt DC line for connection to the

tuner meter lamp.

BU (BACKUP)

+3

VDC
power source, in order to hold the FT-107M
memory circuits when the transceiver is

tumed off.

This is a miniature phone jack for connection to an

extemal speaker. Insertion of a plug into this jack

automatically

(l

7)

KEY

cuts off the intemal speaker.

Your key plug may be inserted at this point. Key-

up voltage is 7 volts, while key down current is

mA.

1.5

(l

8) DELAY

This control vanes the receiver recovery time
constant

for the VOX circuitry.

PIN No.

I

-ALC

2

GND

3

TX GNO

4

GND

5

RX GND

ACC 1

(FOR

ACC

PLUG

CONNECTIONS

LINEAR AMPLIFIER)

PIN No.

1

2

3

4

5

6

7

2

PLUG

CONNECTIONS

CONTROL

13.5V

BV

CONTROL

13.5V

RX GND
TX GND

(FOR FTV-107R TRANSVERTER)

IN

(

(19)

DC

13.5

V

The DC cable should be connected at this point.
Never connect AC power to the DC cable.

Failure
to observe this simple precaution will void the
warranty..During AC operation with the FP-107,

insert the DC dumniy plug (supplied with the AC
power supply)

(20)

AC

into this jack.

When using the internat FP-107 AC power supply
option, the AC cord is connected at this point.
Be certain to

observe the proper voltage when

using the FP-107.

(21)

FUSE

When using the FP-107 AC power supply, the AC

100/1

line fuse is inserted at this point. For
VAC, use only a

234

VAC, use only a 5 amp fuse.

10

amp fuse,

and

10/117

for 200/220/

EXT VFO

PLUG

(FOR FV-107

I

EXT

VFO

2

GND

3

EXT

BV

5

13.5V

6

BV

CONNECTIONS

EXTERNAL VFO)

IN

MICROPHONE

PLUG

RECOMMENDED ACCESSORIES

GENERAL

(

FV-107 EXTERNAL VFO FTV-107R VHFIUHF TRANSVERTER

The FV-l07 is a solid state remote VFO for the
FT-107M senes of HF transceivers. Featuring a
precision'analog
mechanism, the FV-107 includes clanfiers for the
transmit, receive, or transceive frequency, allowing
offset of

As many as six crystal-controlled channels may be
installed, for

optional). Selection of VFO or crystal operation
is made by a convenient switch on the front panel
of the FV-107. All power required by the FV-107

provided

is

i

dia1 coupled to a high quality gear

2.5

kHz from the dia1 frequency.

fixed, channel operation (crystals

by

the FT-107M transceiver.

The FVT-lO7R is an all-new transverter for the

FT-107M senes, capable of operation on the 50,

144, and 430

equipped with all control circuitry, and the

MHz and either the 50 MHz or 144 MHz unit

430
may be installed as options (in the USA, the

MHz unit is built in). Power input is

144

DC

on all bands.

For satellite operators, three satellite bands are
provided, allowing full duplex operation
the transverter, using an extemal receiver in
addition to the FT-107M. The operator may
mit on 145 MHz while listening on

MHz, or transmit on 435 MHz while listening

435
on 145 MHz.

The FTV-I07R includes repeater split on all
repeater bands within its operating range, for
operation on the
emerging. Fully solid state, the FTV-107R includes
protection for the final
damage caused by high SWR. Spunous radiation is

least 60 dB down.

at

MHz bands. The basic unit comes

many SSB repeaters that are

amplifier transistors against

20

through

29

MHz or

watts

trans-

SP-107P PHONE PATCHISPEAKER

Tlie ' SP-107P featuriiig a sliaped-response loud­speaker, 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 trans­ceiver 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 handl­ing 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
Excellent regulation and conservative design assure
the owner of many years of trouble free operation.

Hz.

MICROPHONE CONNECTIONS

YM-34 MICROPHONE CONNECTIONS

l

GENERAL

GRAY

,

I

Y

Y

M

M

-35

-36

YM-35 MICROPHONE CONNECTIONS

YM-36 MICROPHONE CONNECTIONS

l

I

d!":

YM-37 MICROPHONE CONNECTIONS

HF

ANT

l

Telephone

Line

INSTALLATION: FT- 1 07'M

GENERAL

C

The FT-107M is designed
ceiver for top-performance
operation. For operation from
optional FP-107 intemal power supply or FP-107E
externa1 power supplylspeaker are available from
your Yaesu
tions carefully, so as to understand the important
steps required for a successful installation.

PRELIMINARY INSPECTION

Upori opening the packing carton, immediately
give the transceiver a thorough visual inspection.
Check to see that the
working freely, and inspect the
sigiis of damage. If any dainage
contact the
ddcument the
ing carton and foam packing material for possible
use at a later date.

dealer. Please read the following sec-

shipping company immediately, and

damage completely. Save the pack-

to

be a single-unit trans-

base station or mobile

AC

mains, the

controls and switches are all

cabinet for any

has

been sustained,

supply/speaker console provide this voltage with
excellent regulation.

from your Yaesu

Before attempting operation of the FP-107 or FP-

107E from AC mains, check to see that the voltage

specification on the rear of the sqply matches

local supply voltage. This inspection must be

your
made before applying power to the equipment.

Operation of the FT-107M directly from AC
mains, from
improper fuse shall void the warranty on this
equipment. Likewise, operation of the FP-107
or FP-107E from

improper fuse shall void the warranty.

an

Please refer to the power transfornler primary con­nectioii chart when changing supply voltages.

improper DC voltages, or with an

These options are available

dealer..

WARNING

improper voltages or iise of

C

BASE STATION INSTALLATION

The FT-107M requires a power supply of
at 20 amps for proper operation. The FP-1 07 inter­nal power supply and FP-107E extemal power

+

+

,IIi--fi:l

+

AC

200V

13.5

VDC

AC

117V

The transceiver should be connected to a good

ground. The ground lead should be made of

earth
a heavy,
the GND terminal on the rear
ceiver. The
ground bus should not be longer than 10 feet.

braided wire, and. should be connected to

apron of the trans-

ground wire connection to the station

t

100

110

PT

I

AC

llOV

AC

IOOV

Fp-1071 FP-107EPOWER TRANSFORMER PRIMARY CONNECTIONS

(Refer to FP-107ElFP-107 Installation

on

page

58for details.)

GENERAL

MOBILE INSTALLATION

The FT-107M is designed for operation from 13.5
volts DC, at 20

peaks. As
as a mobile station. The DC cable is a standard
accessory for the

For under-dash mounting, a special mobile mount­ing bracket is available from your Yaesu dealer.

The FT-107M should be located away from heater

ducts, and a minimum of two inches of air space

on all sides is recommended, in order to allow
proper air flow around the
critical is the area around the heat sink fan ex­haust port.

The DC cable comes equipped with a 20 amp fuse
in thé positive line. Use
socket.

When making battery connections, be absolutely
certain to observe the proper polarity of the supply

voltage. cohnect the RED cable lead to the POSI­TIVE battery terminal, and connect the BLACK
lead to the NEGATIVE battery terminal. Reversed
connections could cause permanent damage to the

transceiver

such,it provides exceptional performance

amps maximum current on voice

FT-I07M.

cabinet. Especially

only a 20 amp fuse in this

Before connecting the DC power cable to the trans­ceiver, check the battery
mnning (battery charging). If the voltage exceeds

15

volts DC, the vehicle voltage regulator should be

so

adjusted,
age to less than 15 VDC. As well, do not operate
the transceiver if the DC supply falls below 12
volts. The transceiver should always be
when the
from possibly causing
circuits of the radio.

ANTENNA CONSIDERATIONS

The FT-I07M is designed for use into a 50 ohm
resistive

50 ohm figure are of no consequence, the
matic fmal protection (AFP) circuitry will reduce
the power output if high SWR conditions are

encountered.

However, your FT-107M AFP circuitry and final
amplifier components are tolerant of the minor
SWR conditions present in
lations. At

rated output power will be obtained.

full

as to limit the maximum charging volt-

car is started, to prevent voltage transients

load. While minor deviations from the

an

SWR of 3:1, for example, 75% of

voltage with the engine

tumed off

damage to the transistor

auto-

many amateur instal-

(

(

CAUTION

OUR

DAMAGE CAUSED BY IMPROPER SUPPLY
CONNECTIONS NOR
BY USE OF AN

It is recommended that the power connections be
made directly to the battery, instead of to the
ignition switch, etc. The battery
able filtering action against ignition noise, while

connection to the ignition switch can place the
power
as short as possible, and keep the lead away from

ignition cables.

Permanent damage will occur if reversed
supply polarity voltage is applied to this trans­ceiver. Our warranty does not cover
caused by reversed supply polarity.

WARRANTY DOES NOT COVER

DAMAGE CAUSED

IMPROPER FUSE.

provides consider-

line

in

a

noisy

circuit.

WARNING

Keep

the

power

damage

cable

The Yaesu RSL senes of mobile
able from yourYaesudealer,fok mobile installations.

1

antennas is avail-

DIAL CALIBRATION

The FT-107M digital display is a true frequency
counter, so no calibration is required. When
changing sidebands, the digital display will also

change 3 kHz.

Analog Dia1 Calibration

SSB

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

USB or

LSB.

----Dn=

PIIDCPITMaFIXEXT

INT

Mil

GENERAL

M

Set the NBIMARK switch to

(2)

(3)

Rotate the VFO dia1 to the nearest

MARK.

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 on the bottom panel may be changed, if

desired to change the viewing angle for the

it is
VFO. In the
are two

accessory kit for your FT-I07M, there

extender feet with mounting pads. These

may be installed either in front or in back, accord­ing to the requirements of your station. Refer
the drawing for mounting details.

(

25

kHz

to

GENERAL

OPERATION

The tuning procedure for this transceiver is not
complicated. However, care must be exercised
when operating this equipment so that peak
performance is obtained. The following paragraphs
describe the procedure for operating the FT-I 07M.

INITIAL CHECK

Before connecting the transceiver to the DC power

source, be certaiii that a fuse of the proper rating

is iii use. When
Power Supply, be certain that the voltage specifi­cation for the power supply matches your local AC
supply

FREQUENCY SELECTION

Frequency selection on the FT-107M is by means
of a digital as well as an analog display. The digital
display reads the true frequency, with accounting
for
bration of the display is necessary when changuig

modes. The calibrator is chiefly useful for making
receiver adjustments.

The digital display allows resolution to 100 Hz,
while the- analog skirt on the main dial allows

1 kHz. One revolution

corresponds to a frequency change of 25 kHz.
The marker signal may be used to set the 5 kHz

marking of the analog dial skirt.

A further coarse frequency determination may be
made
contains a

RECEIVE OPERATION
(l) Connect a 50 ohm antenna to the rear panel

voltage.

the carrier frequency. Therefore, no recali-

through the main dial window, which

subdial calibrated every 50 kHz.

ANT jack.
follows:

POWER
VDX GAIN

..............

NB

MODE
WIDTH 12 o'clock position
AF GAIN
RF CAIN

APFINOTCH knob

iising the FP-107 or FP-l07E AC

of

the main tuning dial

Preset the controls and switches as

........................

......................

Fully counterclockwise

..................

...............

.

Adjust later for comfortable level

...............

...

Desired mode

Fully clockwise

12 o'clock position

OFF

PTT

BAND
RXCLAR

CLARIFIER

M

ATT

APFINOTCH switch.
AGC
NB/MARK switch
METER

(2) Tum the POWER switch ON. The nieter lamp

and digital display will becoine
The meter needle should deflect to within the
VCC range at the

(3)

Adjust the AF GAIN control for a conifort­able listening level. There is no "preselector"

or other peaking required for this receiver,

because the preselector networks are all

preset.

(4)

When pulse-type noise is encountered, tum
the NB switch ON. Now,
clockwise until the noise pulses are
nated. The best setting of the blanker for
overall receiver performance is one tliat just
eliminates the noise
advanced too far. No noise
eliminate all types of noise, but the

blanker is a ,state of the art design that
provides significantly improved blanking

capability over earlier designs.

(5) For varying the width of the IF passband,

rotate the width control. In the IF, two
8-pole
fixed, and presents a boundary for the band-

width. The center frequency of the IF is then
varied across
filter, using a mixing technique that results in

no

The result is continuously variable bandwidth,
from 2.4
This system is highly effective in eliminating

high-pitched "buckshot" on SSB, as

as interfenng CW signals.

The WIDTH system is defeated during AM
operation, and the received signal
the second IF filter.

...................

Desired band

......................

FINE

..........

.............

12 o'clock position
12 o'clock position

..........................

..............

..............................

................

........................

illuii~inated.

right side of the meter scale.

rotate the control

pulses, without being

blanker will

FT-107M

crystal filters are used. One filter is

the

passband

change of pitch

kHz down to approximately 300

on

the received signal.

nf

thc

OFF

OFF
OFF

OFF
VCC

elimi-

scsnnd

Hz.

well

bypasses

F

t

(

f

'

(

t

GENERAL

c

f

(6)

Under conditions of very heavy QRM, while

operating CW, the APF (Audio Peak Filter)
may be activated. Switch the APFINOTCH
lever to APF, and tune the APFINOTCH
control for maximum enhancement of the

desired signal. The operator will observe that

the background noise will be reduced
draniatically,

ratio.

noise

(7)

For elimination of an interfering carrier
witliin the AF passband, set the
switch to NOTCH. Then rotate the APF/
NOTCH coiitrol carefully for the best nulling
of the offending carrier. The notch is

extremely sharp, so
excellent
in

elimiilating interference.

The S-meter still indicates the interfering

'

carrier strength regardless of notching, be­cause the notching action is done in the audio

stage.

(8)

The RX CLARIFIER may be used if
the incoming signal is drifting. Press
the RX CLAR button, and rotate the

CLARIFIER control, to activate the receiver
offset
to allow offset of the transmit frequency, and
bot11 the TX and RX buttons may be pushed

together to allow offsetting of the transceive

frequency from the

tuning. The TX button may be pushed

resulting in excellent signal to

APFINOTCH

tuning is critical, but the

notch depth is extremely effective

dial frequency.

TRANSMITTER OPERATION

The

FT-I07M

requiring
switches. No
initial
level, is required.

When transmitting, it is important that you always
have a dummy

to the antenna jack. The automatic final protection

unit will reduce power if an

connected.
When transmitting, never change the position of

the MODE, BAND, nor the SELECT switch. It
is possible for the final amplifier transistors to be
damaged by transients generated by this kind of
abuse. Please
fail.

The FT-107M contains a heat-sensing protection
circuit for
full power (e.g. key-down CW) for more than 30
seconds. If you have keyed down for a 30
secoiid period, we recommend two minutes of
standby operation to allow the final transistors to
recover to normal operating temperature.

The following paragraphs describe transmitter
operation. If our

107M will provide many years of trouble-free

operation.

setting of the mic gain and RF processor

transmitter is extremely easy to use,

only presetting of the controls and

tuning procedure, other than an

load or matched antenna connected

improper load is

follow this simple precaution without

the final amplifier. Do not transmit at

guidelines are followed, the FT-

(9)

(

AGC time constant setting may be ac­complished by setting the AGC switch for the
desired recovery time, slow or fast. The AGC
systeni may also be defeated by setting this
switch to OFF.

(10) For extremely strong signals, a 20 dB attenu-

ator may switched into the incoming receive
line. Set the
purpose.

ATT

switch to ON for this

PRELIMINARY CaECKS

(1) Preset the controls and switches as follows:

VOX GAIN
FWD SET
MIC GAIN

DRIVE

COMP
MODE
DIAL
BAND

SELECl..
TXCLAR..
PROC..
METER switch

(2) Connect a matched antenna to the antenna

jack.

(3)

Set the VOX GAIN control to MOX.

...............

............

........

...........

............

Fully counterclockwise
Fully counterciockwise

Fully counterclockwise

PTT position

12 o'clock position

..........................

................

...................

Desired frequency

Desired band

......................

.....................

........................

.....................

FSK

VFO
OFF
OFF

IC

.

GENERAL

(4)

Advance the DRIVE control so that the 1C
reading on the meter reaches exactly 10

amperes.

(5) Set the METER switch to FWD, and adjust

the FWD SET control so that the meter
needle is aligned with the FWD SET position
on the meter scale.

(6)

Set the METER switch to REF. The meter
needle should be within the REF scale area
for full power operation. The REF area

covers SWR

which will

in power output. If the needle rests above

the REF area, remedial work on your antenna
system may be in order. Alternatively, the
FC-107 Antenna Coupler may be used to
provide a 50 ohm load for your transceiver.

(7). For the above test procedure, please be sure

to check the frequency before transrnitting.

Also, use the minimum power necessary to
obtain a full scale
step. If less than 10
this reading, by all means use the lower power
level.

SSB OPERATION

readings of up to

result in essentially no reduction

reading on the FWD SET

amps of 1C will provide

2 : 1, the area

the COMP control to the 10 o'clock position,

and

adjust the DRIVE control so that the

ALC meter needle does not go beyond the

range of the meter. Now adjust the

ALC
COMP control with the meter switch set to
COMP; the meter should indicate between
and 10 on the COMP scale during voice peak
coiiditions.

While some initial adjustment of the MIC
GAIN, COMP, and DRIVE control may be

required, be careful not to
mitter, for best spectral purity.
ing into the microphone in a long syllable
(such as the word "four"), do not advance

the DRIVE control beyond the

the IC or forward power
increase

(5)

To set the VOX circuitry, advance the VOX
GAIN control on the front panel so that your
voice activates the transmitter. The rear panel
DELAY control will
the VOX time constant for the

after you have finished speaking. The

time
ANTITRIP control,
IF Unit, and it

to prevent the speaker output from activating
the VOX. Do not use more VOX GAIN nor
ANTITRIP than necessary.

may be adjusted as necessary

overdive the trans-

hen

point where

reading ceases to.

allow the operator to set

desired hang

VR4003, is located on the

(

5

I

speak-

(

(1) Connect your microphone to the front panel

MIC jack.

(2) Preset the controls and switches as follows:

MODE
METER switch
MIC GAIN
DRIVE

(3)

Close the microphone PTT switch, and speak
into the microphone in a normal voice. Adjust
the MIC GAIN control so that the ALC meter
needle does not go beyond the ALC range of
the meter. With the meter switch set to IC,
the

Samps, or about 113 to 112 of the full power

single-tone meter

(4) To adjust the RF speech processor, place the

PROC switch ON. Speak

in a normal voice, and do not

CAIN setting performed in step (3). Advance

........

...........

...............

reading on voice peaks will be roughly

Desired mode, LSB or USB

...................

10 o'clock position

Set for full output

reading.

into the microphone

change the MIC

ALC

CW

OPERATION

(l) Insert your key plug into the rear panel KEY

jack. Key up

current is 1.5
keyers will work without modification with

FT-107M.

the

(2) If you use a footwitch, connect its plug to

the rear

Set the MODE switch to

(3)

set the VOX GAIN control to PTT.

(4) Activate the transmitter (close the footswitch

or set the VOX GAIN control to MOX), and
go key down. Adjust the DRIVE control fort
the desired power input, up to a maximum
reading of about 18A on the IC meter.

voltage is 7 VDC, and key-down

mA, so most all electronic

apron

PTT

jack.

CW-W

or CW-N, and

(5)

For semi-break-in operation, advance the
VOX GAIN control to the point where the
VOX relay is activated by the sidetone audio

signal. The DELAY control,

rear panel,
VOX relay hang time.

(6)

For QRP operation, reduce the level set by
the DRIVE control. The power output may

be reduced to

FSK OPERATION

The FT-107M is designed for 170
ation.

may be adjusted to control the

O

watts, if desired.

located on the

Hz

FSK oper-

SELECT SWITCHESIMEMORY OPERATION

(Note: The memory unit is an available option

for the

Frequency control on the FT-107M is by means of
the
an
combinations of the
will determine the circuitry in control of each

mode, and the selection procedure is descnbed

below:

VFO This positioii selects TX/RX oper-

FT-I07M)

internal VFO, the memory and DMS circuitry,

external VFO (such as the FV-107), or vanous

three. The SELECT switch

ation on the FT-107M internal

VFO.

(l) Connect tlie lead from your terminal unit to

f

the rear panel FSK jack.

(2)

Set the
VOX GAIN control to MOX. Advance the
DRIVE control for a
tlie 1C meter. Do not operate the FT-107M
oii FSK at the same power levels as stipulated
in the sections regarding SSB and CW
ation

(3)

The keying signal from your terminal will
now activate
using the optional CW filter, the CW filter
wili automatically be selected
operation.

AM OPERATION

(1) Set the MODE switch to AM, the METER

switch to
DRIVE controls fully counterclockwise.

(2)

Close the microphone

vcliice the DRIVE control until the reading

on the IC meter reaches S amps.

MODE

]C,

switch to FSK, and set the

reading of 5 anips on

the FT-I07M transmitter. When

dunng FSK

and rotate the

MIG

PTT

switch, and ad=

oper-

GAIN

alid

MR

RX MR

TX MR

EXT

RX EXT

TX EXT

In addition, changing of and offset from memory
channels is controlled from the front panel. The
controls of interest are as follows:

M

M SFT

This position selects TX/RX oper­ation on the FT-107M memory
system.

This position selects RX operation
on the
on

This operation selects TX operation
oii the memory, with RX operation
on the FT-107M

This position selects TX/RX oper­ation on the FV-107 extemal VFO.

This position selects RX operation
on the FV-107, with TX operation
on the

This position selects TX operation

on the FV-107, with RX operation

on the

This button is used to store a fre-

quency

This button activates the DMS cir­cuit.

ineniory, with TX operation

tlie FT-107M internal VFO.

internal VFO.

FT-I07M internal VFO.

FT-107M internal VFO.

in

memory.

c

(3)

Speak into the microphone in a normal voice,

alid advance the MIC GAIN control until a
slight downward deflection of the IC meter
is noted on voice peaks. Do not advance the

MIC

CAIN control too far, as any excess

energy above that required for full modu- or memory operation.
lation will be wasted in spurious emissions.

(4)

In the AM mode, the RF speech processor
and variable IF bandwidth control are not

usable. 1-19

RX CLAR

TX CLAR

T/R CLAR

This button selects offset tuning of
the receive frequency during VFO
or mernory operation.

This button selects offset tuning of
the transmit frequency during VFO

When both buttons are pushed, off­set tuning of the transceive fre-

.quency is provided.

GENERAL

M FINE The memory fine tuning control

provides a very fine tuning adjust­ment for memory channels. The
available offset range is
mately 500 Hz, making this con­tro1 ideal for tuning between the

100 Hz DMS steps.

M SFT The Digital Memory Shift (DMS)
(knob) circuitry is controlled by the M

SFT knob. When a memory
is programmed, and the M SFT

button is
quency can be shifted up or down
in 100 Hz steps, up to and slightly

beyond the 500 kHz limits of the
normal VFO range.

M CH The memory channel selector

chooses the
nel.

TYPICAL MEMORY OPERATION

0peration:of the meinory system and DMS circuit­ry is perhaps best described by the use of several
examples. Following the

programming techniques will be discussed.

(1)

You are operatiiig on a net on 3970 kHz and
must QSY down

traffic. With the SELECT switch set to VFO,

the main tuning dia1 to 3970 kHz. Press

set

M

to memorize 3970 kHz in the desired
memory channel. Now move the main dial
down to 3960 kHz to handle the message.

When finished, set the SELECT switch to

for instant return to 3970 kHz, the net fre-

quency. For retum to 3960 kHz, again select
VFO.

pushed, the memory fre-

desired memory clian-

exainples, soine advanced

10 kHz to handle a piece of

approxi-

channel

MR

If DXIDX starts to drift, press the RX CLAR
button, and usc the clarifier. Alternatively,
for

slight dnfting, use the M FINE control.
If DXIDX
M

SFT button, and rotate the M SFT control
to the new frequency (e.g. 7080 kHz). The
M

SFT control will not affect the transrnit
frequency, because the SELECT switch is
set to RX MR, and control of the
frequency is by the VFO.

(3) You find DXIDX oii 21270 kHz, working

stations by order of call area. You
DXOAA on 14145 kHz, listening oii 14205

kHz, also by call area. The meinory and no
tune-up capability make this situation easy
to cover.

First, tuiie to 21 270 kHz oii the VFO. set the
M CH switch to 1, and press

handswitch to
kHz. Set the M CH switch to 2. aiid press M.
Now movc the

To check DXgAA's frequency (14145 kHz),
set the SELECT switch to RX MR. To check

DXIDX's frequency, set the bandswitch to

21 MHz and the M CH switch to 1.
is acknowledging your call area, set the

SELECT switch to

check DXOAA, set the bandswitch to 14 MHz,

and the M CH switch to 2.

ing for your call area, switch to RX MR for

RX on 14145

Because there is no "preselector tuning" con-

trol, nor any transmitter peaking whatsoever,

it may be seen that several stations on differ-

ent

bands

qeconds, without toucliing a VFO dial.

decides to QSY 10 kHz, press the

transmit

also find

M.

Now. set the

14 MHz, and the dia1 to 14145

main dial to 14205 kHz.

If

DXl

DX

MR

and call him. To re-

If

DXOAA is listen-

Hz and TX on 14205 kHz.

may

be checked in a niatter

~f

f1

(

L

t

<

(2) You are operating split frequency on

phone, and you hear DXIDX on7090 kHz,
listening for calls on 7205 kHz. With the
SELECT switch on VFO, tune to 7090
and press M to store that frequency in chan­nel 1. Now tum the main dial to 7205 kHz,
and set the SELECT switch to RX MR; you
will now be listening on 7090
transmitting on
pile-up of stations on 7205
DXIDX, set the SELECT switch to VFO;

you will now be listening on 7205

7205

kHz. To listen to the

kHz, while

kHz calling

kHz.

40meter

kHz,

GENERAL

NMES ON DMS OPERATION

The DMS control will allow offsetting of the
meniory frequency in 100 Hz steps. Every several
steps. however, a
memory frequency may be

a

relocking of the memory circuitry during shift

by

operation,
lasts
queiicy stability whatsoever will result on tliat

.z

step". The design technique that produces the

briel' "cliirp" also ensures cleaii local oscillator
operation, important for good
tlie receiver.

Wlieii you turn on the M SFT buttoii, perform a

sliiTt ~isiiig the

huttoii OFF, the memory will return to the
original ineinory frequency. Howevcr, wlien you
INISII
rrpirii to the previous sliift frequeiicy; you will

start oii the oripiiial riieinory frequency, and a
iiew sliift must be prograinmed. An alternative
soliitioii is sliown in the "Advanced Programrning
of Memory

Wlicii usiiip the M SFT control, it will frequeiitly

(

useful to use the M FINE control for tuning

be
betweeii the 100 Hz steps, especially on CW. The
M

FINE control should, otlierwise, be set to the

l I o'clock position. Wheii a frequency is stored

iii nieniory. theii recalled, tlie M FINE control
sliifts the inemory frequency based on the position
of tlie M FINE control at tlie time of frequency

(

entry. Therefore, one can see that the offset
capability of tlie

iii1

is iiot preset to the

ADVANCED PROGRAMMING OF MEMORY

CHANNELS

The parallel storage systeiii used in. the FT-107M

niemory allows a degree of flexibility not found in

other nieniory systems: the ability to program a

new memory frequency

memory frequency. An

this teclinique can be used to good advantage.

and it is entirely normal. The "chirp"

only a small fraction of a second, and no fre-

the M SFT buttoii on again, you will not

Chaiinels" sectioii, below.

slight momentary "chirp" in the

observed. This is caused

dynamic range of

IL1

SFT knob, then tuni the M SFT

M

FINE control will be reduced

12

o'clock position.

having shifted an earlier

exaiilple will show how

t

Let us say that DXgAA is traiisiiiitting on 14195
kHz, tuning between 14225 and 14250 kHz;
watchiiig DXgAA's operating practice, you notice
that he listens for stations at
in the above range. Here's how to proceed:

5

kHz intervals with-

Tune the maiii dial to 14195 kHz, set the M CH
switch to 1, and push M. Now set the SELECT

M

switch to RX MR, and press the
Rotate the M SFT knob until you find-the station
DXOAA is working on 14225 kHz (check the trans­mit frequency of DXQAA instantly by switching
the SELECT switch to VFO to

M

sequence). Now set the
press M. If

14230
frequency, set the M CH switch to 3, and press
M. Follow this sequence until you have
favored listening frequencies in meniory. Now you
can switch to TX MR, tum M SFT OFF. and

select the memory channel corresponding to the

likely listening frequency for DXgAA, be-

most
cause 14225 kHz, 14230 kHz, 14235 kHz, etc.
will all have been
channels. Use the traiismit clarifier, if desired,
to make a minor change in a frequeiicy.

You riiay coiitinue to shift off of any ineinory

cliaiinel, and use it to program a new memory

channel, up to the limit of 12 total memory

channels. This teclinique can
advantage when operating ou a uet, if you

want to store and check several frequeiicies
witliout

SCANNING OPERATION WITH
PHONE (OPTION)

The YM-35 scanning microphone (option) can be

used to
scanning speed control, for coiivenient operation.
The YM-35 can
equipped
memory system for its scanning capability.

First, program any meniory frequency as a starting
poiiit. Now set the M SET button to ON, and press

the UP or DN scanning button on the YM-35. For

long as you hold the UP or DN switch down,

as
scanning will occur. Release the scanning switch to
stop tlie scan.

To activate the fast scanning feature, press both

UP

the
both switches for

the next QSO is with a station .on

kHz, rotate the M SFT knob again to that

stored in successive nieniory

leaving the net frequency (on the VFO).

provide up/down scanning, as well as

only be used with a memory-

FT-107M, because it depends on the

or DN switch and the FAST switch. Release

stopping of the scan.

CH switch to 2, and

SFT button.

follow the calling

DXgAA's

also be used to

YM-35

MICRO-