Sansui TU 777 Troubleshooting guide

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OPERATING II\TSTRUC TIOI\TS
& SERVICE IUANT]AL
SOLID-STAIE AM/FM STEREOPHONIC TUNER
SAI§ST]I TU_777
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SANSI{I ELECTRIC COMPANY LIMITED

Thank you for purchasing the sansui TU -777 . In doing so, you
have made a wise choice, one that promises you many delightful
years of rich stereo enjoYment.
Model TIJ-777, incorporates the very latest in circuitry design,
including a new FET front end for increased FM sensitivity, high
stability;nd low distortion. It also features a dignified black
faced front panel, symbolic of all sansui high-grade sound equip'
ment. BeÍore leaving the Sansui factory, this model was tested,
inspected and certified to be in perfect working order'
To keep it that way, it is imperative that you read the opera-
tion section of this manual thoroughly before attempting to in-
stall and use the tuner. Since this manual also contains other
helpful information on checking and servicing the tuner, and in-
stalling it in a custom-made cabinet, you will undoubtably want
to retain it Íor future reference. Again, our sincere thanks for
purchasing the TU-777 and our best wishes for many years of
trouble-Íree stereo enjoYment.
G(lNTEilTS
OPERATION SECTION
Switches & Controls '...
Antenna Connection
Amplifier Connection
3,4
5,6
6
7
General Maintenance .........
Spe cifi cationsf Characteristics
SERVICE SECTION
General Troubleshooting Chart " L7, L2
DisassemblyProcedure.... ""' 13
DialMechanism "' 13
Custom Mounting
Test Points Chart
Alignment Procedure
FM..
FM.MULTIPLEX
AM..
Printed-Circuit Sheets & Parts List . .... 19, 20,2L,22,23
BlockDiagram "' 24
Other Parts & Theiv Pusition on Chassis . " ' 25,26
7,8
9, 10
t4
15
16
L7
18

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.. ti,::::,i
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SIryITCHES & CONTROLS
Power Switch
The TU-777 goes on when
lever is set to ON Position. POWER switch Muting Switch
Eliminates interstation tuning noise when select
ing F\{ stations. It should be used sparingly
particularly if the tuner is located in a weak signa
area. When you $'ant to receive a t'eak station
this switch should be kept off.
FM Stereo Indicator
Iiluminates whenever the tuning dial passes
station broadcasting an FN{'N4PX program. Doe
not light up for regular F\{ monaural broadcasts
Power Indicator
Lights up whenever the tuner is receiving cur
rent. Remains lit as long as the Pos'er Switch ;
On.
-3-

* Dial Scales
For more convenient tuning, theTU-777 features
a rounded dial window. The outside dial corre-
sponds to the FM band, the inside dial to the AM
band. Both bands share a single dial controlled
by the Tuning Knob.
)Tuning Knob
Use to select both AM and FM stations. Be sure
to watch the Tuning Indicator when using this
control for pinpoint station accuracy.
Function Selector
Allows the following selections to be made:
AM: for ordinary AM band broadcasts
FM MONO: for FM band monaural broadcasts
FM AUTO: for both monaural and stereophonic
FM band broadcasts. Tuner switches automatic-
ally to either signal depending on what is being
broadcast.
FM STEREO: for FM stereophonic broadcasts
exclusively. Use if stereo signal is too weak and
automatic switching is unstable in the FM AUTO
position.
Tuning Indicator
Aids in pinpointing stations with the Tuning
Knob. Stations are accurately tuned when the
needle in this window swings as far to the right
as possible, but not necessarily to "5". This move-
ment may vary from station to station.
MP)( Noise Canceler
Use to depress disturbing noise when listening to
an FM stereo broadcast, but only if disturbing
noise occurs. In weak signal areas it may some-
times impair the separation of stereo sounds.
High frequency sounds are not affected when this
switch is on.
F
FM Antenna Local-Distant switcl,
GND grounding terminal
Antenna terminal
AM Ferrite bar antenna
AC.Outlet
Power fuse
O utput
Output level adjustment Control
FM Stereo separation adjustment Control
-4-

ANTENNA CONNECTION
AMPLITIER CONNECTION (

)
ANTENNA CONNECTION
t
The quality of reception that can be expected from
theTU-777 is largely dependent on the correct posi-
tioning and use of antennas. The following proce-
dures are recommended for noise-free reception.
Built,in AM Ferrite Bar Antenna
This sensitive antenna, located on the rear panel of
the tuner, is usuaily adequate for strong AM recep-
tion. To use, puli it down and away from the back
of the tuner until it comes to a stop halfway between
the top and the bottom of the tuner.
Outdoor AM Antenna
In ferroconcrete buildings or in areas remote from
the broadcasting station, the built-in ferrite bar
antenna may be inadequate for strong AM recep-
tion. An outdoor antenna then becomes necessary,
This can be accomplished by connecting the PVC
wire accompanying the tuner to the antenna termi-
nal marked AM-A on the back panel. Run this wire
to an antenna that has been installed outdoors and
away from the building. At the same time, the unit
should be grounded. Position the outdoor antenna
where reception is strongest while actually receiv-
ing a broadcast. And, for reasons of safety, be sure
to attach a lightning arrester to the outdoor an-
tenna.
FM Antenna
Where FM broadcasting stations are near and FM
signals are strong, satisfactory FM reception can be
obtained by using the feeder wire accompanying
the tuner. Connect the Íeeder wire to the antenna
terminals marked FM-AI and FM-Az on the rear
panel, then fully extend the wire to a T shape and
fix it to a wall or ceiling where it aliows the strong-
est reception.
If the TU-777 is used in a thick-walled building or
in an area remote from FM broadcasting stations,
the indoor feeder wire antenna may be inadequate
for strong signal reception. An outdoor antenna
clesigne<i exclusively for FM reception should then
)
-6-
FM antennas of the 300 ohm balanced type and 75
ohm unbalanced type can be used with theTU'777.
Connect either antenna to the matching antenna
terminals on the rear of the tuner. The 300 ohm
feeder wire should be connected to the FM antenna
terminals A.1 and Az as in Fig. 1.
If a 75 ohm coaxial cable is used, connect the con-
ductor to the FM antenna terminal A, and the
shielding wire to the terminal G as in trig. 4.
NOTE: FM sensitivity cannot be raised simply by
lengthening the antenna. Adjust the antenna's
height and direction while actually listening to a
broadcast for the best reception.
AMPLIFIER CONNECTION
The TU-777 has been provided with two cords for
quick and convenient connection to an amplifier.
One is marked L and corresponds to the left stereo
channel, the other is marked R and corresponds to
the right. If the TU-777 isto be used with Sansui's
matching AU-777 amplifier or any other Sansui
amplifier, insert the pin plugs of each cord into the
amplifier inputs labeled TUNER or AUX respec-
tively. Be sure in either case, that cord L is insert-
ed into the left input and R is inserted into the right
input. If the TU-777 is to be used with an ampli-
6er other than Sansui, the same procedures general-
ly hold true, but it is best to check the manufac-
turer's instructions to be sure.

OPERATION
GENERAL MAINTENANCE
RADIO PROGRAMS
To receive AM broadcasts:
1. Turn the Function Selector to AM
2. Select the desired AM station on the AM dial
with the Tuning Knob. It is properly tuned when
the needle in the Tuning Indicator woves as far to
the right as possible.
To receive FM broadcasts:
1. Turn the Function Selector to FM MONO for
regular monaural broadcasts, to FM AUTO for both
monaural and stereo broadcasts, and to FM ST-
EREO for only stereo broadcasts.
NOTE: If stereo reception is unstable with the
Function Selector in the FM AUTO position, turn
to FM STEREO.
If too much disturbing noise accompanies a stereo
broadcast in either FM STEREO or FM AUTO
positions, first switch the NoISE CANCELER on,
and if the noise is still too disturbing, turn the Func',
tion Selector to FM MONO to hear the same broad'
cast monaurally.
2. Select the desired FM station on the FM dial
with the Tuning Knob. It is properly tuned when
the needle in the Tuning Indicator move§ as far to'
the right as possible. The FM Stereo Indicator il-
luminates automatically whenever an FM stereo
broadcast is being received.
3. When too much interstation noise is during tun-
ing, turn the Muting Switch to its On position.
4. It is best to adjust the output level of the tuner
to match that of other sound equipment being used
with the amplifier. This can be done by turning the
LEVEL ADJ. control on the rear of the panel to
either a higher or lower level.
lt-
GENERAL MAINTENANCE
FM Stereo Separation
If the channel separation during FM-MPX stereo
reception is inadequate or excessive, turn the screw
marked MPX SEPARATION on the rear of the
tuner for natural proportions. Never attempt to
adjust it without reason however, as it has been
properly adjusted and tested prior to leaving our
factory.
Local,Distant Antenna Switch
This switch helps to adjust the tuner to the strength
of FM signals in whatever area it is being used.
Set it to DIST if you live in an area where FM
signals are weak. If you live near broadcasting sta-
tions where there is danger of interference between
stations, set the switch to LOC.
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Where to Place
Since transistors are extremely susceptible to heat,
the TU-777 has been designed to diffuse heat
through the top and rear of its case. Therefore,
special consideration should be given to where it
will be used before installing the tuner. It should
not be operated in a place where it is exposed
directly to the sun, near radiators or other heat-
generating sources, and it should never be mounted
in an air-tight cabinet. Finally nothing should be
placed on top of it.
AC Outlet
'fheTU-777 has ben provided with a 150VA power
outlet on its rear panel. It can be used an AC power
source for other components such as a turntable,
but care should be taken not to use it for any com-
ponent that exceeds its 150VA po\À/er capacity.
Power Fuse
If the tuner fails to operate when the power is
switched on, its power fu§e may be blown. To
check, turn the fuse holder at the rear of the tuner
to the left. If it is blown, disconnect the tuner from
its power source and replace the fuse with an
identical 1A fuse, after finding and eliminating the
source of trouble that caused the fuse to blow.
Using wire or a fuse of a different capacity as a
stop-gap measure is dangerous and shouid be avoid-
ed. If the new fuse blows when the power is
switched on again, contact your nearest Sansui
dealer or our Service Section.
-a_
Level Adjustment Control
This control, labeled LEVEL ADJ. on the rear
panei of the tuner, allows theTU-777's output level
to match that of turntable, speakers and other com-
ponents connected to an amplifier. Turned clock-
wise, it increases the output level of AM and FM
broadcasts; turned counter-clockwise, it decreases
the output level of both.
Grounding
Connect one end of vinyl or enameled wire to the
terminal screw marked GND at the rear of the
tuner, attach a copper plate to the other end, and
bury it underground. Whenever an outdoor AM
antenna is used, grounding becomes necessary. In
all cases, grounding is desireable since it allows a
better SiN ratio to be obtained. FM AM
À-30OO-A2 A

SPECIFIGATIONS
GHARACTERISÏICS
FM SENSTTIV]TY OHF) & IMAGE RATIO FM SECTION
FREQUENCY RANGE: From 88 io 108 MHz
SENSITIVITY:
Antenno input 300O bolonced 1.4PV
(S/N 20 dB, quietins)
l.8pV (lHF)
Antenno input 75O unbolonced 0'7pV
(S/N 20 dB, quietins)
l.opv (lHF)
IMAGE REJECTION: Better thon 80 dB (lHF)
SELECTIVITY: Better thon 50 dB (lHF)
SIGNAL TO NOISE RATIO: Better thon ó5 dB (ó0 dB
input, 100% mod.)
HARMONIC DISTORTION: Le§s rhon 0'81 (ó0 dB
input, 100% mod.)
SPURIOUS RESPONSE REJECTION:
Better thon 90 dB
lF REJECTION: Better thon 95 dB
SPURIOUS RADIATION: Less thon 34 dB
CAPTURE RATIO: Less thon 2'5 dB (lHF)
FM STEREO SEPARATION: 35 dB (óOdB input' 100%
mod.)
AM SECTION
FREQUENCY RANGE: From 535 to l,ó05kHz
SENSITIVITYi lsttV (ot 1,000 kHz, S/N 20 dB)
SELECTIVITY: Better thon 20dB (ot 1,000 kHz,
ó0 dB input)
DTSGRIMINATOR
(
-9-
CARRTER FREOUENCY (MHz) -.-
F8ÉOUEhrí orFFERElrcÉ{X}u -
S/N & DISTORTION
i FREOUEN'Y 98i'H'
MODULAÍCN IOO% 4MH?

L IMAGE FREQUENCY REJECTION:
t Aerer thon 50 dB (ot 1,000 kHz)
I
f- lF REJECTION: Bener rhon 100d8 (ot t,000kHz)
i AUOIO OUTPUT 2V(from o to 2v voriobte)
I aooD IMPEDANCE: over roko
I
L OTHER SPECIAL FEATURES
I Circulor Diol. Muiing. FM Stereo Auto. FM Stereo
I t"dicotor. FM locol/distont Switch. Fly wheel tuning.
L AM Íerrite bor ontenno. FET Front end. Function
I o lïïï'.l',i;.;ïï'?fl',',ï.ïï,'lï:::ï[,.
I
I FM Antenno lnput for 300 ohms Bolonced ond 75 ohms
I Unbolonced.
I TRANSISTORS & DIODES
I
I 28 tronsistors ond I FET
L 24 diodes ond 1 Zener diode
I
, POWER REQUIREMENTS
Ll powER voLrAGE; ::;:,220-240v, rrom 50 to
i POWER CONSUMPTION: ro vA
I olrraENStoNS:
I
I width: 13e/*o
Height: 6%'
; Deoth, l3%'
I WEIGHT: rz.1 lbs.
*All rights reserve speciflcations subject to change'without notice.
e
AMPLITUDE MODULATION'SUPPRESSION RATIO
I
6
3
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6
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=
FM MPX SEPARATION
FREOUE\CY (Hzl -
AM SENSITIVITY & IMAGE RAÏIO
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2
;
2
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ts
FM CAPTURE RATIO (IHF)
6[-f rc
,.NLL i i ]cnnn'rnraiou*'rcvl
:.[§[r-i i=-[-rrl
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o ro 2o to ^rtï*o,ffir.,31 70- 80 eo roo
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AM IF SELECTIVITY
-lo-

GENERAL TROUBLESHOOTING GHART
This section has been prepared to help you quickly and cor-
rectly determine the causes, reasons and remedies in situa-
tions where your tuner does not perform sasisfactorily. You
will note that most of the causes result from improper hand-
ling or positioning of the receiver and not from internal
defects. For situations that are not covered in this section
however, and in instances where you are fairly sure that a
breakdown in the tuner's circuitry has occurred, please
consult your nearest Sansui dealer or our Service Center.
PROGRAM SYMPTOM I PROBABLE CAUSE
IWHAT TO DO
AM, FM or
MPX reception A. Constant or
tent noise
times or in
aÍea,
intermit-
heard at
a certain
* Discharge or oscillation i
caused by electrical apPli- ,
ances, such as fluorescent :
Iamps. TV sets, D.C. mo-
tors, rectifier and oscillator
* Natural phenomena, such
as atmospheric static, and
thunderbolts
* Insufficient antenna inPut
due to thick reinforced
concrete walls of the build-
ing or long distances from
the station
* Wave interference from
other electrical appliances
* Attach a noise limiter to the
electrical appliance that causes the
noise, or attach it to the power
source of the tuner.
, * Install an outdoor antenna and
i ground the tuner to raise the signal-
to-noise ratio.
* Reverse the power cord plug-
receptacle connections.
* If the noise occurs at a èertain
frequency, attach a wave trap to the
ANT. input.
* Keep the set a proper distance from
other electrical appliances.
I
AM receotion ;
I
B. The needle of the
tuning meter does not
move well.
C. The zero point of the
meter diverges much.
A. Noise heard at a
particular time of a
day, in a certain area
or over a part of the
dial.
* The movement of the ITune the set for maximum signal
stength.
needle is one thing, the
sensitivity of the tuner is
another.
* Regiorul diff"r"n".-in n"ta t - ,* tt,í not at fat.rtt'
intensity.
* This results from the nature
of AM broadcasts. * Install the antenna for maximum
antenna efficiency. See "ANTEN-
NA" in the operating instructions
section.
* In some cases, the noise can be
eliminated by grounding the tuner or
reversing the power cord plug-
receptacle connections.
I
rB. High-frequency noise
- ll -
* Ad iacent-channel interfer-
err"-e o. beat interference
* TV set too close to the
audio system
* Although such noise cannot be
eliminated, it is advisable to turn the
amplifi er's TREBLE control properly
from midpoint to left and switch on
the HIGH FILTER
* Keep the TV set a proper distance
from the audio svstem.

PROGRAM SYMPTOM PROBABLE CAUSE
FM reception A Noisy Poor noise limiter effect
or too low S/N ratio due to
insufficient antenna input.
NOTE: FM reception is affected considerably by
the conditions of transmission by stations: power
and antenna eficiency. As a result, having
difficulty in receiving another station.
WHAT TO DO
* Adjust the feeder wire antenna sup-
plied for maximum signal strengh.
* If this does not prove effective, use an
outdoor antenna designed excluvely
for FM. When you use a TV
antenna for both TV and FM with
the help of a divider, make sure the
TV reception is not effected.
* An excessively long antenna may
* Install the antenna and its lead-in
from the
. input as
B. "Scratch-like"
is heard.
Tuning noise between
stations
Noise heard during
FM-MPX reception
while not heard during
FM mono reception.
B. Clearness of channel
separation is decreas-
ed during the recep-
tion.
* Ignition noise caused by
the starting of an automo- wire a proper distance
road or raise the antenna
described above.
I
i
between i * This noise results from the I * Turn on the MUTING switch.
bile engine and/or other I
motors
T
i - -t Ills nolse resulls rrom Íne "' r urn on f,fle .vlu I lI\\, swtf,cfl.
i nature of FM reception. As I In as much as it also reduces the
tt e .taiun sig"al- becà*èr i réniiiiritv, it shoulà be used spar-
weak, the noise limiter i ingly.
effect is also decreased.
The amplification of the
limiter, in turn, is enlarged
and thus a big noise is
generated.
FM-MPX recep-
tion A. * The service area of the
FM-MPX broadcast is only
half as much as that of the
FM mono broadcast.
* Excess heat
* Interference
+ Install the antenna for maximum
antenna input.
* SY/itCh thc NOISE CANCELER tO
its ON position.
* Circulation of air is important to the
tuner. Make sure that air can flow
underneath.
' * The indicator is not at fault.
* Readjust VR562
i * The indicator is not at fault.
I x Readjust VRsoz
I
I
Fr
lc
I
I
The stereo indicator
goes on and off.
The stereo indicator
goes on and off even
though a stereo station
is not received.
* Interference
_12-

DISASSEMBLY PR(ICEDURE
DIAL MECHANISM (
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CUSTOM MOUNTING
This diagram shows the size and dimensions required
for mounting the TU-777 into a custommade cabined,
Note that ample space is provided for complete air circu-
lation above and below the tuner
1. Be sure the cabinet window measures 131fu'/ x 5$f'l
mm as indicated in the diagram.
2. Place two boards on the floor of the cabinet as
ilustrated. Boards should measure i$'t x:]$" x 10§'/ mm
3. Drill two holes in the bottom of the cabinet at points
corresponding to holes in the bottom of the tuner.
4. Remove the four rubber feet from the TU'777.
(Retain for future use.)
5. Insert the TIJ-777 into the cabinet through the window
until the edges of its front panel are flush with the
cabinet, and secure both tuner and cabinet with washers
and butterfly bolts provided.
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-14-

TEST POINTS CHART
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ALIGNMENT PROGEIIURE
Any internal parts replacemert or changes,
proper adjustment again. Approprate test
the following pages.
you make in the TIJ-777 requrres
points and adjustments are given on
FM ALIGNMENT PR(}CEDURE NOTE: To align, set the FM signal generator level to minimum
Turn tuning gang íully.
Center carrir wave.
Set pointer at reference mark
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TM DISCRIMIilATOR C}lARACTERISÏIC
,
IM IT GHARASTERISTIC
STEP ALIGN GENERATOR FEED
SIGNAL OUTPUT
INDICATOR DIAL SETTING ADJUST ADJUST
FOR
1. lF Trans-
former 10.7 MHz
+200kHz Srveep signal is
sent to TP161
via the 0.02pF
ceramlc
capacitor
Oscilloscope is
connected to
TR:oz emitter,
and then TR265
colle:tor to
ground via the
0.05pF ceramic
capacltor
Primary and
secondary sides
oÍ Lror, Tror, Tro,
and T26s
Best I.F.T.
wave from
2. Discrimi-
nator 10.7 MHz
+200kHz Srveep signal is I Oscilloscope is
sent to 24. I connected to
via the 0.05rrF I 2k via the
ceramic 1 0.05gF
capccrtor I capacttor
FM
Discrirninator
transformer
T26a primarY
and secondary
S curve
J. O.S.C 88 MHz
400H2 lO0%
Modulation
To antenna I Oscilloscope
termincl:; I and V.T.V.M.
I
I at output load
I
88 MHz O.S.C. coil
Ltot Maximum
4O.S,C. 108 MHz
400H2 100%
Modulation
To antenna Oscilloscope
terminals i and V.T.V.M.
at output load
l08MHz O.S.C. trimmer
TC,o, Maximum
ÉRepeat 3
and 4
6RF Amp.
Circuit 90MHz
400F{2 1O0%
Modulation
To antenna
terminals Oscilloscope and V.T.V.M.
at output load
90MHz Antenna coil
Lror, Ltoz and
L,o,
Maximum
7. RF Amp.
Circuit 106 MHz 400H2 100%
Modulation
To antenna
terminals Oscilloscope and V.T.V.M.
at output ioad
106 MHz Trimmer TC161,
TCroz and TCrog Maximum
8. Repeat 6
and 7.
-16-

ALIGNMENT PROCEIIURE
FM MULTIPLEX ALIGNMENT PROCEDURE
1. Do not attempt to align the Multiplex Circuit unless the following equipment is available:
a. Multiplex Stereo Generator b. Oscilloscope c. AC V.T.V.M. d. Audio Oscillator e. FM Signal Generator
STEP ALIGN GENERATOR FEED
SIGNAL OUTPUT
INDICATOR ADJUST ADJUST
FOR
1. 67 kHz Trap 67kHz Audio
Signal Connect to
TPno V.T.V.M. at
TP.o. Llol(MFC-A) Minimum
2. 71 kHz Trap 71 kHz Audio
Signal Connect to
TP.o V.T.V.m. at
TP.o, L10r(MFC-B) Minimum
3. L9kHz
Transformer FM Signal Gen.
Modulated 30%
by STEREO Gen.
sub-channel
Antenna
terminals
Tune to signal
V.T.V.M. and
Oscilloscope at
TProt
T101(MPT-20A) Maximum
4. 19 kHz
Transformer FM Signal Gen.
Modulated 30%
by STEREO Gen.
sub-channel
Antenna
terminals
Tune to signal
V.T.V.M. and
Oscilloscope at
TP.os
Tmr(MPT-2oB) Smaller
peak value
of two
peak values
5. 38 kHz
Transformer FM Signal Gen.
Modulated 30%
by STEREO Gen.
sub-channel
Antenna
terminals
Tune to signal
V.T.V.M. and
Oscilloscope at
TP.ot
T10s(MPT-20B) Smaller
peak value
of two
peak values
6. 38kHz
Transformer
and
Separation VR
FM Signal Gen.
Modulated 30%
by STEREO Signal
Gen. channel-L
Antenna
terminals
Tune to signal
V.T.V.M. and
Oscilloscope at
output load
channel-R
T{os(MPT-20B)
within )1 turn
and separation
vR(vR6or)
Channel-R
Minimum
-17 -

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AM ALIGNMENT PR(ICEDURE
STOP
O.S.C AM-generator
533kH230%
400H230%
Modulation
O.S.C Antenna
terminals l
Reiterate
2 andS
RF amp.
NOTE: To align, set the AM signal generator level to minimum.
ADJUST
FOR
Best I.F.T.
wave form
Maximum
'o
AM-generator
1600 kHz
40OHz3O%
Modulation
AM-generator
600 kHz
4O0Hz30%
Modulation
Oscilloscope and
V.T.V.M. at
output load
Osciiloscope and
V.T.V.M. at
output load
1600 kHz
600 kHz
Antenna
terminals
AM IT Ci|ARACTERISTIC
RF transformer
Tro,
Ferrite bar
Antenna coil
L.o,
Maxrmum
Maximum
Maximum
Maximum
Maximum
FEED Í OUTPUT
SIGNAL INDICATOR
GENERATOR
Antenna
terminals Oscilloscope and Primary and
secondary sides
from the lst
I.F.T. (Tg.z) to
the 3rd
I.F.T. (T301)
I.F.
Transfor-
mer
455k]dz
+30 kHz
Sweep-generator
O.S.C. Coil Tse2
Oscilloscope and
V.T.V.M. at
output load
Antenna
terminals
O.S.C. Trimmer
cap. TCgoa
AM-generator I Antenna Oscilloscope and I l{}OkHz
àöó ffi--* 1 iËiÀ-iï"ï. Í.í.V.Ml.t
4OOHz30% i I outPutload
Oscilloscope and I l400kHz
V.T.V.M. at
output load
RF amp. I AM-generator
1400 kHz
\ aooarnz
I Modulation
Antenna
terminals
Antenna
circuit
Trimmer TC361
Antenna i Oscilloscope and
terminals I V.T.V.M. at
AM-generator
1400 kHz
40OHz30%
Modulation
Reiterate
5,6,7,8
-la-

PRINTED.CIRCUIT SHEETS & PARTS LIST í
FM, AM IFT F.l 014
L -_--____- -- __________-_---:i
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Rzor
Rzoz
Rzos
Rzoq
Rzos
Rzos
Rzoz
R2os
R2o9
Rzro
Rzr r
Rzrz
R2r3
Rzr+
Rzrs
Rzr o
Rzv
Rzrs
Rzt p
Rzzo
Rzzt
Rzzz
Rzzs
Rzzt
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Rzzt
Rzza
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2A
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IA
2A
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2B
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28
2D
2C
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2B
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2E
2F
2F
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3A
3C
3B
48
3B
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4C
4D
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3.3ko %W +10%
6.8ko %W +to%
lko %w +10%
lko %w +10%
I ko %w +10%
r0ko %w +10%
5.óko %w +10%
l.sko %w +10%
47oa %W !10%
5.óko %w !10%
8.2ko %W +10%
22a %W +10%
l ko %w +10%
680C} %W +10%
?zdt %W +tO%
ó.8ko %w +10%
8.2ko xW +\O%
r ko %w +10%
lko %w +to%
22a %w +10%
roko %w +to%
lko %w +10%
lko %w +10%
22A %w +to%
lko %w +10%
r ko %w +to%
ó8O %w +to%
r0ko %w +10%
l0ko %w +10%
rko %w +10%
10ko %w +to%
22ka %w +10%
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
PREC. Fixed
22o"
47 ka
r8 ko
r2ko
39 ko
ó.8 ko
r00ko
2.2ko-
5ó0 ko
10 ko
rko %w
l20o %w
4.7 ka %W
22ka %w
r.5ko %w
100o %w
68ko %w
5.óko %w
rko %w
rko %w
rko %w
rko %w
4.7 ka %v't
rsko %w
lko %w
lko %w
5.6ko %w
lsko %w
ó8ko %w
l2ko %w
+10% PREC. Fixed
+10% PREC. Fixed
+10% PREC. Fixed
+10% PREC. Fixed
tl0% PREC. Fixed
+lO% PREC. Fixed
+10% PREC. Fixed
+10% PREC. Fixed
+10% PREC. Fixed
t10% PREC. Fixed
+10% PREC. Fixed
+10% PREC. Fixed
+lO% PREC. Fixed
+10% PREC. Fixed
tlo% PREC. Fixed
+lO% PREC. Fixed
X.10% PREC. Fixed
+\0% PREC. Fixed
+lO% PREC. Fixed
t10% PREC. Fixed
+lO% RREC. tixed
+10% PREC. Fixed
+ l0oÀ PREC. Fixed
t10% PREC. Fixed
+10% PREC. tixed
+1096 PREC. Fixed
+\0% PREC. Fixed
+10% PREC. tixed
+10% PREC. Fixed
+lO% PREC. Fixod
R:s:
Rzel
Rzss
Rzsr
Rzsz
Rzse
Rzsc
Rzlo
Rzat
Rzqz
Rzas
%w
%w
%w
%w
%w
%w
%w
%w
%w
%w
B
B
B
L
L
C
C
C
D
D
D
D
Raor
Rsoz
Rgos
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R305
R:oa
Raoz
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