Yaesu FT-180A User manual

FT-18(}/a
INSTRUCTION
MANUAT
YAESUINUSENCO.,
I"TD.
cPo Box 1500
TOKYO,
JAPAN

INDEX
INTRODUCTION
SPECTFICATIONS
SEMICONDUCTORS
FRONT
PANIL
CONTROLS
AND
SWTCHES
.,,..,.,,,
REAR
PANEL
CONNECTIONS................ ............................
INSTALLATIONS .............. 7
oPERATION ........,.,....... 13
CIRCUIT
DESCRIPTION ,...,.., 16
MAINTENANCEAJ{D ALIGNMENT ,. , ,. . .. . ,. .. . . .. . . 28
MODIFICATIONS ...,,......... 36
PARTSLIST .................. 45
l
I
2
3
4
5
Io . tr'v -t t4t^4'

The FI-180A is a rugged,
compact
SSB
transceiver
for base
or mobileHF apptications.
Designed
to provide
a typical
pEppower
outputof tO,50or 100
watts
over
tho t.6 to 18
MHzrange,
theFT-180A
employs
modem
FETandbipolar
technology
for;ta;;-ot:the-art
performance
andrcliability.
A! many
as
6channels
maybe
installed
in theFT-r
g0A.once
installation
iscompleted,
no
further tuningprccedure
isr€quired
for full opemtion
on each
channel.
TheFi_180A is
paokaged
in a heavygauge
metar
casefor excellent
mechanicar
stability,andthe final
amplifier
ttansistors
arefully protected
against
possible
damage
fromhigh
antenna
Swn.
Optionalaccesso.ios
includethe FC.420
Remote
Controlled
Antenna
Coupler,
FH_lgO
Remote
Controllerwith telephone-type
handset,
crystaloven for optimum lrcquency
stability,
and
XF-Io.7HL-ALSB
filter. I
YAESU
FT-18OA
HFSSB
SOLID
STATE
TRANSCEIVER

r'
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SPECIFICATIONS
GENERAL
FrequencycoveraSej
1.6 - 18 MHz (except for J1 MHz near the
10.7MHzlF)
Emission
t]?e:
J3E (USB, LSB), H3E (AM)
(LSB filter optional)
Numberofchannels:
6simplex
or3semi-duplex
Operating
temperaturerange:
-10"c to
+50"C
Pover requircments:
13.4
volrsDC
t l07onegative
gound
Powerconsumption:
20ampstransmit,
I ampreceive
(100W
w/ooven
rl0 PPM
type)
Case
size:
100w
typer95(H)x 240(W)x310(D)mm
V
50W
type:95(H)x 240(W)
x290(D)mm
l0w type:95(H)x 240(w)x 260(D)mn
Weight:
l00Wtype:6
kg. V
50Wtyper
5.5kg.
10w
type:5.0kg.
TRANSMITTER
Power
output:
Asperpower amplifiers
SSB
- 100watts;AM - 35watts
SSB
- 50watts;AM - l7 watts
SSB
- l0 watts;AM- 3.5watts
Unwantedsidebandsupptession:
Betterthan50dB
Carrier
suppression:
Betterthan50dB
Spudous
emissionsi
Betterthan65dB
down
Thirdorderdistortion
products:
Betterthan3l dBdown
Transmitter
frequency
rc6ponse:
300 2700 Hz
(-6 dB)
Maximumbandwidth:
3kHz
(SSB)
Srability:
Betterthan
110ppm
Distortion
ptoducts:
20dBorbetter
Microphoneimpedancei
600ohms
(dynamic)
Tonesignal:
1500Hz
Antenna
outputimpedrncei
50ohmsnominal
RXCEIVER
Sensitivity:
SSBbetter
thanI llV for 20dBS/N
AM better
thanl0 !V for 20dBS/N
Selectivity:
SSB2.4kHzat-6 dB,4.0kHzat-60 dB
AM6,0kHzat
-6 dB,l2 kHzat.-50 dB
Receiver
type:
Si'lglesuperhetercdyne
Intermediat€frequency:
10.7MHz
lF rejection
:
Better
than60dB
Image
rejection:
Better
than60dB
Audiooutput power:
2 watts(Q.
lO%fHD
Audio output impedancei
4 ohms
AKH9TUFT.I8OA
FCCRule
PartNo.21.900(K)
.402(D),81,83,
87&90
t'-
Specifications
subject
to change
withoutnotioe,

SEMICONDUCTORS
IntegratedCircuits
(IC): 2SC732GR 2 151555
(Si) 1'7
AN6551 | 2SC'7328L 1 152208
(Varactor) I
rcL7660CpA I 2SCl583 3 lSS53
(Si) 2'1
MCI496P I 2SCls89 I i* lSS97 22
MC140t6BCp I 2SCl8l5Y 16 (Schottky
barrier)
MCI4572UB I 2Sc181sGR 2 1N60
(Ge) 9
.pPCl5lA I 2SC1815BL I 10E1
(Si) 14
apc2002Vl2SCI923R3loDlo(Si)4**
rrpC?808H 2SCI959Y 2 BZI4O
(Zener) I
pPC78L08 2 i* 2SC2l66 I 'trr* HZSC-I
(Zener) 2
25C2290 2 I* HZ9CI(Zenet) I
FieldEffectTransistors: 25C2395 2 i' HZ3CI
(Zener) 2 i"
2SKI92AGR 3 2SC24O'7 2 (2) +'*'l
2SKl25 4 25C2509 2 **'* FC63
(Varactor) I
3SK73GR 9 2SD288K l1*
2SD71?O 2 't l00Wmodel
Transistorsi 2SD844K I 't* 50Wnodel
2SA564Q 2 *** lOWmodel
2SA564R I Diodes: ( )with
crystal
oven
2SC496Y lN2?0 l7
ACCESSORTES
. Micrcphone (YM-36) 1
(M3090026)
DCPowerCord I
lOWmodel (T9006806)
50wmodel (T9006815)
100Wmodel (T9006820)
MiniatureExtemalSpeakerPlug
(P2240) I
(P0090034)
HeadphonePlug (SH30l0) 1
(P0090007)
AccessoryPlug (SC-l2CM) I
(P0090078)
CoaxialAntenna
Plug (MP-5) I
(P0090021)
SpareFuse I
10W
model 6A
(Q0000012)
50W
rnodel 15A
(Q0000008)
l00W
model 20A
(Q0000009)
Remote
Control
Plug (P-I620BA{A) I
(Poo90l28)
,,Jt^/
Lv-
/ *I nr,
n$"
3

,|-;
FRONTPANEL
CONTROLSAND SWITCHES
(1)
MrC
This eight-pinconnector
acceptsthe microphone
input, aswell aspush-to-talk
control (PTT) line.
Themicrophone inputimpedanceis600ohms.
(2) PHONES
This is a standard
phone
jack for accommodation
of the headphone
plug.
Audiooutputimpedanceis
8 ohms.lnsertionof theheadphone
pluginto this
jackautomaticallydisconneots
theinternalspeaker,
(3) POWERON/OFF/REMOTE
Thisisthemain
ON/OFF
swilch
forthetransceiver
and
accessories,whenused.
The FH-180 Remote
Contrcller
isonly switchedon whenthisswitchis
setto the REMOTE
(lower)
position.
TheFC-420
RemoteControlledAntennaCouplerand/or op-
tionalcrystaloven
arcswitchedonin eithertheON
(upper)
or REMOTE
position.
(4) NB
Thisswitchactivatesthenoise
blanker.
(5) FUNCTIONCALIB/CALL
This isa momentary switch
used
for sending
tone
calling
signals,
aswell asfor calibntingthetrans-
ceiverforincoming signals.
(6) METER
This switchselectsthe displayfunction for the
fiont panel meter.Onrcceive,thismeterfunctions
asa signalstrengthmeter
(S-meter).
On transmit,
thesourcevoltage,finalamplifiercollectorcurrcnt,
rclative
poweroutput or reflected
powercanbe
displayed.
(7) MODE
This
switchselectsthe
operatingmode:
LSB,
USB
(J3E)
or AM (ll3E) (LSB filter
optional).
Donot
operatethisswitchwhiletransmitting.
(8) RF GAIN
This is a manual
glin control for the RF andlF
stages
of the receiver.Counteiclockwiserotation
decreasestheRFand lF gain.
(e) AF CArN
This control setsthe audiooutput (volume) l€vel
for the receiver.Clockwiserotation increascsthe
volume
level.
(r0)
sQL
The squelch control quiets the receiverwhenno
signalsarcbeingrcceivecl.This controlshould
be
setto the point where
the backgroundnoise
just
disappea$,in order
to retain mrximum
sensitivity-

(
l1) CLAR
This control allows fine tuning of the signal
received,for precise trackingof unstableor off_
frequency
signals.
(13)
METER
This is the front panel$meter, FWD/REF
meter,lCmeter
and
soutce
voltage
metet.
(14) SPEAKER
Thisisthe
grilllor the
intemol
speaker.
PO
(12)
CHANNEL
This
switchseleots
theoperatingchannel-
Donot
operatethisswitchwhile
transmitting.
REAR
PANEL
CONNECTIONS
(r) ExTsP
This isthe extemalspeaker
outputjack.Insertion
of a plug into this
jack automaticallydisconnects
the
intemalspeaket.
(2) GND
For bestperformance
andsafety,
a goodground
shouldbeconnectedatthis
point.
(3) ANT
This SO-239 j0ck acceptsthe antennacable
(4) POWER
Conn€ctthe DC powercord at this point. Nevel
apply AC pover or improperDC input voltages
to this tnnsceiver.
(5) REMOTE
Thisblue, 20-pinconnector
accepts
the
power
and
controlsignalsfromtheoptional FH-180 Remote
Controller,
which provides remote
control of the
CHANNEL selector,AF GAIN and CLAR func-
tions, as well as microphone
input and audio
outputfromatelephone
handsetand/or
speaker-
However,to use
the
FH-180,
oertainmodilications
mustbe made
withia theFT-180A,
the detailsof
whicharedescribed
onpage 42.
(5) ANTENNA COUPLER
This 12-pinconnector
providespower
and
channel
switching
control signalsfor the optional
FC-420
RemoteContolled AntennaCoupler,whichwill
thenmatchthe antennaimpedancefor each
chan-
nel as selected by the FT-180A or FH-180
CHANNELselector.
_J

600rl
YM-36
VIEWEDFROM"A" SIOE
MICROPHONE
CONNECTIONS
HEADPHONECONNECTIONS
MICROPHONEPLUG
EXTERNAL
SPEAKERCONNECTIONS
a-b
IOOIYTtp.:2OA
50WTtp.,
l5A
IOWTt!.,6A
DCPOWER
CORDCONNECT
' I
SATTEBY
OR
IOC
SUPPLY
_ J TEFMLNAL
IONS
-6

INSTALLATION
ANTENNA CONSIDERATIONS
Next to the trunsoeiver,the antennais the most
imporlanlcomponenr
in dsuccesslulcommunicJ-
tions station, as the communicationrangeis
directly relatedto the efficiencyol the entennc.
Thereforc,
great
careshouldbetaken
jn theinstal-
lation
of theantennasystem.
lf a proper
antennaisnot otherwise available,
see
yolu Yaesu
dealerfor aspeciallyfactoryadjusted
YA-10single
banddipole antenna,
YA-ll dual
band dipole antenna,or RSL scries antenna
(for
mobileinstallations).These
antennasarecapableof
meeting
mostrcquircments.
The FT-180Arequiresr loadimpedanceof 50
ohms at the operatingiiequency. tf the load
impodanccdiffers
greatly
fromthisfigure,thefinal
amplifierprotective
circuit will causethe power
output to decrease.If this impedancecannotbe
sgcuredon all dcsiredchannelsan antennatuner
must
beemployed
inorder toprovide a5o-ohmload
impedance
for thetftnsmitter.
The followi g sectionwill describetwo common
types of antennaswhich satisiy the impedanoe
roqrirementol the
FT-180A.
(1) DoubletAntenna
TheDoublet,
or Dipole antennd
consists
of ahalf-
wavelengthof wire, cut into two equal sections
and fed at the center.At this feeding
point, an
antennabalunmaybeutilizedto prcvent unwantcd
radiationfrom the coaxialcable.Maximum
radia-
tion exists at right anglesto the wire. Ceramic
insulators
should
beinstalled
onboth endsof the
antenna,irnda suitablecenterinsulator mustirlso
be Lrsed.llowever,
sometypesof antenna
baluns
inclLrdemountinghooksfor thc antennaelements,
thus eliminatingthe needfor a centerinsulator.
Theseparts may be obtainedfrom your Yaesu
dealer.The correctlengthfof a doubletor dipole
antenna
can be determjnedbl, usiig oneof the
followingfonnulasl
Cut theappmpdatelength
of wirc (allowing
some
extra lengthfor fastening)
into two equal
pieces.
Tie one end of eachto a cenmic insulato.,and
connectthe otherends
to the antennabalun(or
center insulator).Connect the coaxial feedline
(typeRG8A/U
orequivalent) to theantennabalun.
lf anantenna
balunisnot beingused,
connectthe
centerconductor
of the coaxialfeedlirre
Loonc
sideof the centerinsulator's
wire,andconnect
the
shield
of the coaxialline to the othersideof the
center
insulator
(thercis no direct connectionof
onehalf of the dipole
to the other).Thefar ends
of ihe wire elementsmay then be secured,using
nylonropetied to theinsulators.Using
supporting
poles,
hoist the dntennaashighan in the clearas
Possible.
Check
to seethat
theSWR
islessthanl:1.5 ut
the operatingfrequency.
If so, the installation
iscomplete.
Thedipole
antennaworksbestif it is
plaoed
high and in the clear,
sousethe highest
support
possible.
Whcnbuilding
the supports,
rcmembcr
that they shouldform a line perpen-
dicular
to thelinerepresenting
the
shortestdistance
to the station with which communioationis
desired.
,168
Length =
Length=
Frcq
(MHz)
t12.5 (meters)
7
Frcq
(MHz)
Doublet
Antenna

(2) Quarter
WaveWircAntenna
Usually constructed
in a vertical configudtion,
the quarter
waveantennaissometimesusedinbase
stationinstallations.However,it ismorecommonly
used
on ships or yachts,
especiallywhen
thespace
for a doubletantennaisnot available.
Thelength
of thequarter wave
antenna
canbedetermined
by
usingoneof thefollowingformulas:
234
Lmglh = ;::-;;;E- (leet)
1t.25
Freq
(MHz) -"- "'
The wire hils one end connectedto a cemmic
insulator,which is, in tun, hoistedup a non-
metallic mast. The other end of the wre is
connectedto the centerconductorof the coaxial
oable.
For basestation
installatjons
at the higher
frequency
ohannels,the verticalelementmay be
madeof aluminumflrbing
(self-supporting).
Theshield of thecoaxisconnectedto a goodRF
ground.
The ground
systemmayconsistof six to
twelve
wires
3%
longerthanthoradiator,extending
radially
from thecentorol theaDtennalnd bu cd
slightlybeneaththesuifaceof theground. A cold
waterpipemay provide a usable
ground
in many
instances.On yachts, the groundlbil in the hull
must be used. The vertical radiator must be
insulatedfrom grcund,and it shouldnot touoh
anytrces,buildings,orrigging
(onyachts).
For all antennatypes,becertainthattheFT-l80A
meter needle,when switchedto the PO (REF)
position,
staysin the GREENz.oneof the meter
soalewhiletransmitting.If thedeflectionisoutside
of theGREBNzone,
the antennamust be
checked
or readjustedfor thecorrect
impedance.
CROUND CONNECTION
TheFT-l80A shouldbooonnectedto agood
earth
gound for best performzmce
and safety. Use a
heavybmidedwie, not morc than 3 meters
in
length,for connectionto the station
ground
bus.
The
ground
connection
atthetransc€ivershould
be
madeat the rear
panel
GNDstud. When
avefiical
or singlewire antennais usecl,a good ground
connectionisessential.
BackStay
usedasAnteDnaElenrent
i'.J I
Antenna
Element
installed
separately

POWERSUPPLYCONNECTIONS
Irc OPERATION
TheFT-l80A comesequippedfor operution
froma
DC supply. The DC supplyshould
be capable of
20 amperes
(100 watt model) for 13.4 volt
opemtion.
Before connecting
the power connectorto the
rcarapron,
besure thepower supply
voltage
does
not exceedl5 volts. Adjust the power supply
voltage,
ifnecessaly,to ensuFasafesupply
level.
A fuse is locatedin the DC cord for the trans-
ceiver.For 13.4volt operation,a 20 ampere
fuse
isused. Whenreplacingfuses,beabsolutely
certain
to usea fuseof theproper rating,
Beforeconnect-
ing the power connectorto thetransceiver,verify
thatafuse
of the
proper
ratinghasbeeninstalled.
CAUTION
Our wa anty doesnot ooverdamagecaused
bylheuse of incorrecrfuses.Unlessotherwise
specified,
proper
fusesareasfollows:
100wattmodel: 20ampere
fuse
50wattmodel: 15ampere
fuse
10wattmodel: 6ampere
fuse
Connect the RED power supply lead to the
POSITIVE
supplypost,andconnect
the BLACK
power
supply
leadto the
NEGATIVE
supply
post.
TheDCcordisincludedwith thetransceiver.
AC OPERATION
The FP-700
will allow opemtion from AC supply
voltases
of 100/1 10/1
17l20Ol22O1234
wlts, 50160
Hz.Beforecommencing
operationwith theFP700,
beabsolutelycertain
that thevoltag€
specification
markedon the rcar of theFP-7oois
the samc as
your localAC supply
voltage.
Do not connectthe
FP-700AC
cord to a DC supply.Also,be certain
that a fuse
of theproper ratingisinuse.For 100/
Il0/l l7 volt operation,use
a6amperefusein the
FP-700.For
20012201234
volt operation,usea 3
ampele
flrse.
CAUTION
Our wanantydoesnot coverdamagecaused
by improper
powersupplyconnections,
nor
damagecausecl
by the useof an incorrect
fuse,
When
arllvoltageinspections
havebeencompleted,
connectthe FP-700output voltage
cableto the
FT-l80A rearpanel
POWER
jack. PIug
the
FP-700
power
cordinto thew.illoutlet.AC installation
is
nowcolr1plete.
-9-

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II
-II
*|| *II-I
f- | l-
|7V
POWERTRANSFORMERPRIMARYCONNECTIONS
AC
to0v
AC
?34V AC 2?AV 200v tov
,l""lii
tr D-'7 t\A
CIRCUIT
DIAGRAM
IO

MOBILE INSTALLATION
A DC cablefor mobile installationis included
ri/ith the transceiver.
If the DCcableneedsto be
extended,
a heavy,low resistance
cable
must be
usedto avoid
excessive
voltagedrop
in the
cable.
For under-dashmounting,a spccialmobile mount-
ing bracketis available
from Yaesu dealers.
This
bracket,model
MMB-2
(or MMB-16),allowseasy
mobile
installation
of the
FT-180A.
The FT-180Ashould bemountedwhere thereis
adequatespacearound
theheat
sink
to allowfrce
circulationof air. Allow a space of about20 cm
behinda.d aroundtheheatsink,anddonotposi
tion the transceiverdirectly in the path of the
heaterducts.
Whenmakingbattery oonnections,
be absolutely
certainthat theproper
polarityof thepower
cord
isobserved.
Power
connectionsshouldbemade directlyto the
battery insteadof to the ignition svitch. The
battery
provides
considerablefilteringagainst
igni
tion noise,whileconnectionto theignitionswitch
can
place
theFT-180Ain anoise-producing
circuit.
Thepower
leads
mustbekeptasshortas
possible,
andshouldbe kept awaylrom iglition cables
as
muchas
possible.
Whenmakingbattery connections,
be certainto
connectthe RED powercablel€adto the POSI-
TIVE (+) batteryterminal,and the BLACK lead
to theNEGATIVE (-) terninal.
Befofe
ronnectingtheDCcxble
(o
thelransceiver,
checkthebrlteryvoltage
wilh theenginerunning
fast enoughto show a chargeon the vehicle's
ammeter,or immediatcly
afterstartingtheengine.
lf the voltage
exceeds
15 volts, the outomobile
voltage
regulatorshould
beadjusted, soasto limit
lhe
mcximum
voltage
to less
thanl5 volts.
This transceivershould not be operatedfrom
a power solrrceof lessthan 12volts.The trans-
ceiver
shouldalwaysbetumedoff when thecaris
started,to prcventtransicntsin the automobile
electricalsyste from damagingthe transistor
circuitryofthe
FT-180A.
CAUTION
Permanent
damagewill result if reversed
polarity supply voltage is applied to this
ttallsceiver.Out warranty does not cover
damage
causedby reversed
power supply
connecttons. CAUTION
Be ccrtainto obsefle
propetpolarity of the
powercord whenmakingconnections
to the
vehicle
battery.
_II-

7-.
MMB-2
MOBILE MOUNT INSTALLATION
L. Listed below are the partsincludedin the
MMB-2 kit. Only the parts shownwith an
astedsk
(*) arorequircdfor FT-l80A installa-
tion.
*1) Unive$albracketMMB-2
2) cJlch clrirr (55000038)
J
I Righl
I
q0'
I
anglehinge I R00L'lq2(
*4) Knobscrews
5) Screwsfor thecatchclip (M3x4)
6) Scrcws
for right-anglehinge
(M3x6)
+7) Screwsforthe
MMB-2(Msx10)
+8) Lockwashers
lbr theMMB-2
*9) Flatwashers
for theMMB-2
*
l0)NutfortheMMB"2
2. Use the univercalmountingbracket
as a
tehplatefor positioning themountingholes.
Usea 3/16" diameterbit for drilling these
holes,allowingenoughroomfor the trans-
ceivei,its cables,microphoneandcontrols.
Securethemountingbracketwiththescrews,
washersandnutssupplied,
as
shown
in the
dmwing.
3. Usingthe slottedknob screws,attachthe
FT-180Atothe MMB-2universalbracket.
4. Theangle of the transceivermaybeadjusted
to whatever
position
ismost
convenientand
easilyaccessible,
CAUTION
If theFT-180A
isinstalledin acar
whichhas
an ElechonicFuel Injection carburctor,we
stronglyrecommend
that the FT-180A be
installedas far away aspossible
lrom any
equipment
relatedto the carburetorlocated
withinthe
passenger
compartment.
'&e--Krcbsrew
for MMS-2
Figure2
L
o
d
cf
d
cfd %"o
12-

OPERATION
(t)
(3)
(:) Connecta 50-ohm antennafor the desired
operatingfrcquencyto the rearpanel
ANT
jack.
lnsert the micrcphoneplug into the front
panel
MIC
jack.If anon-standardmicrophone
is used,be sure
that the microphone has
an
impedanceof 600 ohms. Connect head-
phones,
if desired,to the front panel
PHONE
Jack.
Referto lhe CAUTIONnoticeon thispage,
and preset the controlsandswitchesasfol
lows:
MODE To desiredmode
AF GAIN Adjust later to comfortable
level
RF GAl.' Fullyclockwise
METER S/FWD
CLAR 12
o'clock
position
CHANNEL Desiredchannel
SQL Fullycounterclockwise
Tum thePOWERswitchON.
Thepanel
lamps
andindicatolsshould
become
illuminated.
Adjust
the
AF CAIN oontrol to acomfortable
listeninglevel.
AdjusttheCLAR
control
foi naturalsounding
rcproduction
of the
incomingsignal.
Adjust the SQL control to the point where
the background
noise
just disappearswhen
the channelis clear, in order to provide
maximumsquelch sensitivity.
lf pulse-type noiseis prcsent ontheincoming
signal,turn the NB switchON. Mostpulse-
typenoiseswill beeliminatedby the
blanker,
although some atmospheric and man-made
whitenoisewill notbetotallyremoved.
(10) To transmit,
press
the microphone
push-to-
talk switch,and speakwith a nomal voice
into the microphone.
Release
the switchfor
rccerver
recovery.
SELECTIVE
CALLING FEATURE
A 1500Hz tonegenerator
isavailablefor selective
calling.Calibration
and
operationusing
thisfeaturc
arcsimple:
(1) When
a1500H2
toneis
received
from
another
station, set the CALIB/CALL switch to
CALIB and rotate the CLARIFIER control
soyour tonematches
thatof the
incoming
signal.Your setis now calibrated
to thesame
frequency
asthat of theotherstation.
(2) To transmit the 1500 Hz tone, push the
CALIB/CALL switch up to the CALL posi-
tion.Thetransmitter
will beactivated
andthe
1500Hztone
sent
for aslongas
youholdthis
switch.
Mekecertain
thatallpower supply
and
eround
connections
havebeen
cofectly made.
(4)
(5)
(6)
(?)
(8)
(9)
CAUTION
NEVER
CHANGECHANNELS
ORMODES
WHILE
TRANSMITTING,
ASDAMACE
TO
THETRANSCEIVER
MAY RESULT.
AL,
WAYS
RELEASETHEPTTSWITCH
AND/
ORCALL SWITCH
TODEACTIVATE
THE
TRANSMITTER
WHEN
CHANGING
CHAN.
NELS
ORMODES.
t3-

FH-IsO REMOTECONTROLLER
INSTRUCTIONS
The FH-180 Remote Contrcller is specifically
dc<ignedioruse
wilh
lhe
FT-
|80A
HFTransceir
er,
after the Transceiver has been apprcpdately
modified.A ten metercableis suppliedwith the
FH-180to a1lowcompletecontroloftheFT-180A
from any convenientlocation, and the FC-420
Remote AntennaCoupler,when used with the
FT-180A,
is alsocontrolledby theFT-180.The
part numberof the ModificationKit requiredfor
the FT-180A
is D3000266,andthe
procedure
is
given
onpage 42.
Specifications
Power
requirements:
13.4VDCat1A,and8VDCat50mA
(supplied
bythe FT-l80A)
Functions:
PowerON/OFF,Channelselection,AF gain
control, Cladfier adjustment,
Tone CALL,
Microphone input, ReceiveroLltput (from
HandsetandSpeaker),PTT
(Push'To-Talk)
AF Output:
Speaker;2W(4ohms)
Handsetearpiece;
0,2
W(4ohms)
HandsetMicrophone:
-68 dBmoutput(600
ohms)
Dimensions
(WHD):
80x 120x 240
mm
Weight:
l 4 ks.
Installation
TheFH-180
canbeinstalledinany
desiredmounf
ing
position,
andonanysudace,
1. The suppliedmounting
bracketscanbeposi-
tioned
sothat themounting
screwsareeither
undertheController,
oroneither side,accord-
ing to individual
requirements.lf themount-
ing scrcwsarc to be locatedunderneath
the
Controller,
tempomrily bolt the bracketsto
the Controllerand hold it in the mounting
positionwhile markingthe positions
of the
bracketson either side. Then retnove
the
bnckets from the Controllerand use the
bracketsas
templatesfor locttinganddrilling
themounting
holes.
2. If the channelliequencies
a.e not already
shownonthechannel
plate
beneath
thehand-
set,write the frequencies
on the label
paper
and
install
it under
thechannel
plate.
3. After the FT-180Ahasbeen
modlfi€d,
con-
nect the lemaleconneotoron the Controller
Cableto the FH-180,
andthemaleconnector
to the REMOTE
jack on the modified FT-
180A,
t4

Operation
Setthe POWER switch on the FT-180A to the
REMOTEposition,and set the FH-180POWER
switchto ON.
Thegeenlampwill light.
Selectthe desiredchannel
using
the CHANNEL
solectoron the FH-180. &t the SPEAKER
swirch
to ON, andadjustthe AF GAIN control for the
desied volume level.This control and the AF
GAIN control on the FT-180A function inde-
pendently,
sothat only the cofltrol on the trang
ceiverwill affectthe
speaker
in thetransceiver,and
only the control on the FH-180will affect the
volumefrom theFH-l80 speakerorearpiece.
When
privacy
is desired,communicationsmay be
conductedonly through the handset.
To disable
the FH-180speaker,setthe SPEAKERswitchto
the MUTE position. Thiswill silenoe the FH-180
speaker
when the handsetis removed
from the
cradle,though the speakerwill bereactivatedwhen
thehands€t
is
replaced.
To transmit
whenusing
the FH-180,
squeeze
the
PTT switch on the insidecentetol the handset
handle, and talk. Release
this switch to rctum to
rcceive.
The CALL and CLAR controlson the FH-180
function identicallyto their counterparts
on the
FT-
180A.
NOTE
The handset
must always
be pressed
snugly
into thecradle
whennotinuse.
Otherwisethe
FH-180 speakerwill be disabled il the
SPEAKER
switchis setto the MUTEposi
tion.andincomingcalls
maynot be heard.
lon (32.4leol)
FH-r80
m
l'\d"l
ts-tt9
t@P\@l
tr-l
---ffi I
FT.IEOA trtr-trao
ootrtrtrtr!
trBtrOtrD!
trOtrODDtr
NOtrBDD!
DlQCNDtr
trtrtrtrDo
ll

CIRCUIT
DESCRIPTION
The block diagnms and circuit descdptionto
followwill provide
anunderstanding
of theinternal
designof this transceiver,
Pleaserefer to the
schematic
diagrumsfor speoific
componentdetajls.
RECEIVER
The RF input signal from the antenna is fed
throughrclay
RL4or!,lamp
fuse
Roor,
and
then
a highpass
filter beforedeliveryto pin 2 of Jro0r
ontheRFUnit.
The signal
passes
throughindividualantennacoils
lbr eaohchannelalldr 10.7IVIHZtrap,andisthen
ampiifiedby Q'm, (3SK73CR),
aduitgate
MOS
FETwithexcellentfreedom
fromcross
modulation
and intermodulation.The amplifiedsignalis fcd
throughan
individual
diode-switchedtuncdcircuit,
which
protects
themixerfron out-of-band signals.
TheRFsigralisbuffercdby Qlo6a
(2SK125)
and
the output from the source
of Qr0oa
is fed to a
single
balanced
mixer,consisting
of Q,oo,.Q,-"
(2SKl25),
wherethe RF sjgnalis mixedwith a
localsignaldeliveredfromQ,""' (2SC2407). This
resultsin a 10.7MHz
IF signalwhichisdelivercd
throughJrooatotheIFunit.
The locolsignalappliedto the local
4nplilier.
Qloo?,
is produccd
in thefollowing manncflthc
locirl oscillator, consisting of Q60r
/Q60ol
(2SCl923R) and fl locdl crystal, generate
a
signalfor eachindividualchannel.Thecrystallbr
eachchannel
isselectedby adiodeswifch,D6o,
D6o"/D"oo'D6oo6
(lSS53) provided for cach
crystal. The control voltage from the channel
switchisappliedto thesediodeswitchesto activate
the appropriateorystal. The outptt from the
oollectorof Q-'/Q6oo, is t'edto buffer Q6o,/
Q6oo,
(2SC1923R),
and then delivercd through
P6os
(P6oo5
)/Jt.o. to Q,oo?
on the RF unit.
The 10.7MHz lF signalis fedto a common
gate
J-FET
amplifier,
Q,oo?
(2SKl25),
andthe
output
passes
through XF,ono, a 20 kHz bandwidth
monolithic crystal filter, which prcvides e4rly
prctection against
IMD produots
while allowing
enough
bandwidthand delay time for the noise
blanker circuit. The signal
then passes through
noiseblanker
diodesD1o,6Drors,
which
actas
switches
ddvcn by noiseblanker
controller
Q2o,s
(2SCl8l5GR).
The
IFsignalisarrplified
by
Q,n65
(2SK192ACR), and then deliveredto a crystal
filter for USII, LSB or AM. whcrc Luwanted
adjacentsignals
arecut out. Finaily,
the lti signdl
fron thecrystal
Iilteris fed
tluoughdiode
switches
to a three-stagelF amplifier, a,*, Qroos
(3SK73GR),
where
thelF signalisamplifiedto a
sullicientlevel
to drivethe
SSBandAMdetectors.
A pofiionof theoutplrtfrom
Qroor
isfedto buffer
Q,oos
(2SCl8l5Y)
and
detectedby D,o,,,Dro,o
(1N60),
resulting
in a fluctuating
DC
voltage.
Tlds
voltage
isampljficd
by Q,oo,
(2SC1815Y),
where
the recoverytilne of thisDCvoltage
istlso deter-
mined.ThisDCvoltagc
actsastheACCcontrol
voltaSe,
whiohisfed
to gatc
I of theRFandlF
amplifiers.
Thisvoltxge
isalsodelivered
to S-meter
buffer
Q,0,, (2SKl92ACR). Oulput from thc
buffer is delivcredto S-meter
amplificr QroD
(25A5644R)
andsqlrelch
control
amplificr
Q,or3
(AN6ssl).
The bufleredoutplrt frol11
the emitter of Qroos
isalsodelivered
throughAM detecto!
diode
D,o,r
(1N60)
to AF buffer
Qlo,o
(2SCl8l5Y),
andit is
then delivered to AF analog switch Q,oot
(MC140l6BCP)
ontheAF unit-This
analogswitch
selectsoutputliom eithertheAM detector
orthc
SSBdemodulator,
depending
on the modeof
operatlon.
The SSB si$al from Q,uo, on the lF' unit is
deiiveredto Jsooa
ontheAF unit,where
it isfedto
product
detector
D.,,". D,oo,
(1N60),
andcon,
verted
to an audiosignal,usingthe carrier
sigral
suppliedby crystal oscillatorQ6o3/Q6oo3
(2SC-
1923R)
and buffer
Q6oa
/Q6ooa
(2SKl92AGR).
Thecarrier
oscillator
changesitsliequenoy
depend-
ingon theactivatcd
mode,
andclarifiesth€control
voltage
with diodeswitchesDuo.
/Duoo,.
D"o,
/Duo6g
(1SS53)
andvariable
capacitordiode
D60e/D6oo,
(1s2208).
NOTE:
ln oder to discriminate
CARRIER/LOCAL
OSC Units with and without the optional
crystaloven,units with the ovenhave
part
numbe$of the lbrm 6XX, endunitswithout
the oven havep4rt nurnbersof the form
6OXX.
Lr .. - t6

The selected
AF signalfrom analog gate
eroos
is
deliver€d
to an active lowpass
filter at e3ooe
(2SC1815Y),
whicheliminates
anyhigh-pitch
noise
on the audiosignal.
It isthendelivered
to buffer
Qroro
(2SCl8l5Y). Next,
this
signal
passes
through
a potentiometer,
whichcontrols
theAF output,
to
audio power amplifier Q3or, (ppC2002V),
and
is
thendelivered
throughJ3oo6
to the
speaker.
A portion ol the RX IF signalfrom e,oo7 is
delivercd to three stages
of noise amplifier,
a,or?,
Q'0,6
and
Q,o,a
(2SC1583).
Each
individual
transistor
contains
two sections,
whicl are con-
figuredasdifferentialamplifiers.When
a carner
or noise-free
signalis rcceived,
the noisesignal
is rectifiedby D.I)zz,D,a,1(1N60),producing
a DC voltage.
This DC voltage
is amplifiedby
Q10,5
(2SClEl5Y),
which
charges
C,,:o
fornoise
blanker AGC purposes. This AGC voltageis
used
to control
the
gain
ofQror?
ande,o16,When
pulse-typenoise is received,
Dro* and Dror3
rectify the noise signal,which controls noise
blanker
switch
Q?ors.
Noise
pulses
areof very shortduration,
but high
amplitude.
Because
of thevery
short
timeconstant
of the RroeT/C,r,s
discharge
path,
ACCvoltage
is
not induced
by these
short
duration
pulses.
There-
fore, the noise amplifiers
operate
at full gain,
prcviding
maximum
voltage
to thebase
of e,o,a.
When
a desired
signal
andnoise
pulse
arereceived
simultaneously,
the blanking action is not im-
paired,
becouse
therelative
differcnce
berween
rne
desired
signal
andthe
noise
pulse
isstillhigh.
TRANSMITTER
ssB
Theaudioinput signal
frommicrophone jack Jor
isfed to J3oo,
on theAF unit.The
speech
signal
is
amplified by Q3oo,(2SC732BL)lnal delivereal
through microphone
gain control potentiometer
VR3@r to two stages
of AF amplifief e3oo,
(2SC?32GR)
and
etrooa
(2SCl8l5y).The
output
from the emitter of Q*oo is appliecl
to clouble
balanced
modulator
Qrooe
(MCl495p), where
the
amplified
speech
signal
andappljed
carder
signal
produce
a DSB signal
at the IF ftequency(10.7
MHz). The balancedmodulator provides
high
carier suppression
stability coresponding to
vadous
temperature
ohanges.
The
signal
isthen
fed
to Jroo,
fordelivery
to theIF unit.
The IF signal
appeadng
at pin 2 of Jroor
is fed
through
bufferQloo,(3SK73GR)
to the appropri-
atecrystaifilter for the mode
in use
(LSB,USB,
A3h) according
to theinstructions
from themode
selector.
The rcsulting
SSB
signal
is amplified
by
Qroo, (3SK73GR)and then delivered
to single
balanced
mixer
Qroor
ande,oo, (3SK73CR)
on
the RF unit. Here
the IF signal
ismixedwith the
localsignal
from thelocalsignal
oscillator/buffer.
Finally, the RF signatis amplified by e,oo,
(3SK73CR)
and
Q,oo.
(2SC2407)
jnthe
pA
unir.
A3h
The USB signal
at Q,oo, from the USBfilter is
Joined
bya I0.7MHz
carrier
signal
fromthecarrier
oscillator,
resulting
in anA3h signal.The carrier
level is determined
by VRloor on the IF unit,
sending
theA3h signal
or1
thesame
pathfollowed
for
SSB.
100/s0
w PowER AMPLIFIER
The input si$al is amplified
by pre-ddver
esoo,
/
,oo'
(2SCI589),
push-pull
drivers
Qsoo,/eoo',
esoo!
/
,oo3
(2SC2395),
andthenfu heramplitied
by rhe
push-pull final amplifier esooa/rooa,
eaoo5/roos
(2SC2290),
which
supplies
approximately
100/50
wattsof RF output. This RF signal
is then fed
through
theLPFunit to theantenna.

NOTEr
Parts
with numbersof the fonn 8)O(X arc
used
in the 50Wmodel,while
thos€
with
numbeBof the form 9X)(X areusedin the
l00Wmodel,
10W POWERAMPLIFIER
The input signalis amplified by driver Q?ool
(2SC2166)
and d€liveredto the push-pull
final
amplifier,consisting
ofQroo and
Qmor
(2SC2509).
This
RFsignalisthendolivered
to theLPFunit.
ALCCircuit
A varietyof level controlsystemsargincludedin
the FT-180Afor protection againstoverdriveand
hishSwR.
At the dirctional coupler the output voltage is
sensed,and wher a high SWR condition existg
the voltage is detected by D.on, D.o1r (tSS97),
andthe overd.iveAl,C voltageisdetected
byD.orr,
D.or. (lSS97). Thcaercctified ALC control
voltages arg amplified together by Q40or
(2S4564Q)
andQ.oo,
(2SCl8l5Y) (A3h: Q.oor-
Qaod
),for thc controlofTX IF stage.
Jtir' - t8-