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DIFFICULTY
POSSIBLE CAUSE
Resistance reading from
Primary
winding
of power
transformer
fuscholder
to ground
less
TO
ahaetad
ta eeyaimd
fusenolder
to ground
less
T3
shorted
to ground,
than 15 megohms,
Bt bypass
capacitor
shorted,
Filament wiring, Check the brown harness
wires and green power transformer lead to
the IF-audio
circuit board, Also check the
wiring to the pilot lamps,
ilaments light, but no
OPR switch not in REC position,
ound with AF Gain turned
2.
No shorting wire between lugs of CW KEY
Fa clockwise,
|
terminal
strip on rear of panel of chassis,
3.
Center lug of AF Gain control shorted to
|
|
ground,
igh pitched squeal with
Capacitor C56 installed wrong,
AF Gain full clockwise,
1
2.
Lug 2 (with one wire) of phone jack shorted,
3.
Resistor R54 not connected,
4
1
.
Audio transformer (#51-55) leads reversed,
Audio hiss present,
but no signals can
assembly,
Make
the following resistance
be heard.
|
checks from lug 1 of each bandswitch wafer
to chassis ground, Resistance readings may
vary
+10% from the charted values,
BANDSWITCH]
BANDSWITCH
SETTINGS
WAFERS
"
fF.
4%
1A
n
a
_
TZ
(ug
4)
-
|
L_
BS3
2.0
BS5
502 | 12
[05 ooo
ee
epi
opt oto
2.
Faulty
component
or wiring in circuit of
tubes Vi, V2, V3, and V4, Check voltages
at the lugs of these tubes, Voltage readings
may vary +20% of the values shown on the
Voltage Chart,
Antenna
trim
capacitor
C2
shorted
to
ground,
Faulty coil on bandswitch circuit board] _
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