Power Amplifier - GE MASTR II Maintenance Manual

FROM EXCITER
J201
C201
3900
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3900 '
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15K
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0204
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3900
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C4220
3900
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R255
3.48K
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R257 R258
4.22K 5.11K
CR284
POWER CONTROL
R270
240
l/4W
R265
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R264
120
R271
3.3K
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90
L256
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70 03
60 02
50
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TOP VIEW
R2104
R2114
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L216
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L242
C286
3900
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3900
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C281A
C289
3900
C290
3900
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L249
SEE
NOTE 2
19B219688G6
19B219688GIQ
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L245 L246
FREQ. SYM90l
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VOLTAGE READINGS
IJOLTAGE READ:NGS ARE TYPICAL READINGS MADE
WITH THE TRANSMITTER KEYED, AND MEASURED
WITH A 20,000 OHMS-PER-VOLT METEFl WITH
REFERENCE TO A- AND NOT CHASSIS GROUNJ. A"'
RF CHOKE (25-50 MICROHENRYS) IS USED IN THE
HOT METER L£.110 TO AVOID DET'JNING RF CIRCVITS
NOTE: READINGS AT 0204 COLLECTOR AND IN THE
POWER CONTROL CIRCUIT WEii:E TAI<EN WITH
THE TRANSMITTER ADJUSTED FOR 110 WATTS OUTPUT.
THESE READINGS W!LL VARY DEPENDING ON THE
SETTING OF POWER ADJUST CONTROL R261.
~- ·-~----
- - - - - • . ; - - ; TO
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~ JSOI-40
H2 L298 1 0.01 UF
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SEE NOTE I
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R250<.;
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C299 CR295
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W202 H6 HI
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l297
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A.COMPONENT VALUES
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150
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120 I
66
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SH!E1.D OF W904
NOTES:
I. CALLED FOR ON PLI9C321295
2. 5011
MICROSTRIP, W205-W2!E
3.
rh
INDICATES l>t-
-:1:-
INDICATES VEHICLE
GROU~O
All RESISTORS ARE 1/2 WATT UNLESS
OTHERWISE SPECIFIED AND RESISTOR
VALUES IN OHMS UNLESS FOLLOWED. BY
K•IOOO OHMS OR MEG= I_,QOQ,POC OHMS·
C~TOR VAUJES IN Plo...vFAI'<AOS {EQUAL
1D MICROMICROFARADS) U!\l.ESS FOLLOWED
8Y UF• MlCROFARADS.INOUCTANCE VAWES
IN MICROHENRYS UNLESS FOLl.CJ\'o£0 BY
MH• MLLIHENR¥5 OR H• HENRYS.
·N OR:lER TO RETAIN RATED £0VI"MENT
-----~
Pf-_RFORMANCE, REPLACE..,£NT OF ANY
S'"RVI~F: pAf.;T SriCULD SE MA:;E ONLY WITN
l ~
. .
COM.PONf.NT tit.VING Thf:
SP~<:•~>CIIT~ONSI
SHJWN ON THE PARTS USF FOR THI\T PART.
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VALUES
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SCHEMATIC DIAGRAM
25-50 MHz, 100-WATT POWER AMPLIFIER
Issue 2
15