Fisher 700-T User Manual

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TRANSFORMER ae PARTS DESCRIPTION LIST
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Symbol
Description
Part
No.
&
a
‘
a)
@)
C776 Electrolytic, 0.5uF, 70V €50483-11
€777,
778
Ceramic,
O.luF,
480-20%,
12¥.
-
C50331-6
C75
ia
oe
C769
R754 Composition, 220K, 10%, 4w RC20BF224K RF 6
R755
*Dep.
Carbon,
1M,
5%,
1/8W
RIZ2DC
105)
CON
@
;
@
“Ol
R756 Pot., 2M, 30%, AGC Adjust R50150-73
R757 Dep. Carbon, 1.5M, 5%, 1/3W R33DC155J :
R758,
759
Dep.
Carbon,
220,
5%,
1/8W
R120C2214
’
(755
|
oscutaror
R760 Dep. Carbon, 100, 5%, 1/8W R12DC1014 TRIMMER sundae OSCILLATOR + Cole
R761
Dep.
Carbon,
2.7K,
5%,
1/8W
R120€2725
Re
TR
TRIMMER
R762 Dep. Carbon, 8.2K, 5%, 1/8W R12DC822J
: R763 Dep. Carbon, 220, 5%, 1/8W R120C221J
* Not used on all chassis.
#12V TO +15V
INPUT “ AGC INS 395
@ Set TUNING dial pointer to zero (0) calibration mark on the
logging scale. If the dial pointes does not coincide with the 0
at the extreme end of the knob rotution, reposition the pointer
assembly on the dial cord und cement the pointer in place to
prevent slippage.
@ Connect OC VT VM to TP301 on the IF board.
@ Connect an RF generator to the NORM antenna terminals.
Use a 120-ohm composition resistor in series with each lead
from the generator—see Figure }.
@ Set RF generator frequency and TUNING dial pointer to 90
MHz (Mc). DONOT USE MODULATION (AM or FM) and keep
the generator output os low as possible during the alignment
procedure,
@ Align oscillator coil (L755) core first~then align the RF
coils (L754, L753, L752) for moximum reading on DC VTYM.
@ Set RF generctor frequency and TUNING dial pointer to 106
MHz (Mc).
@ Adjust oscillator trimmer (C769) first-then adjust the RF
simmers (C767, C761, C755) for maximum reading on OC
VTVM.
@ Repeat alignment several times until accurate dial cali-
bration and maximum gain are observed, Keep the generator
output as low as possible during all odjustments.
@ Adjust RF generator for input of 200 mV, with no modula
tion, at NORM antenna terminals. Use speakers or headphones
to monitor the output.
@ Turn up VOLUME control until noise is heard in the output.
Adjust RF generator for input of 1 mV; gradually inctease
generator output to 200 mV. There should be no audible in-
crease in the noise level. If necessary, readjust slightly
AGC Adjust Pot. R756 for no increase in nutse us the gene+
tator is varied from 1 mV to 200 mV.
FmoM
GENERATOR
oes lad
Figure 1. Generator connections to antenna terminals.

Fisher 700-T Specifications

General

Brand	Fisher
Model	700-T
Category	Receiver
Language	English