Operation - GE 4PE21A1 Instructions Manual

CHANNEL AMPLIFIER
EBI-3641
12.
Readjustment
of
C50 and C53 may be necessary
to
provide
the
most uniform over-all response
to 10
megacycles
± 1 db.
13.
Replace V12 and reset
the controls for normal operation
as
described
in the OPERATION section under Pre -Operational Setup Procedures.
2.
Socket Voltages
To facilitate isolation
of
trouble not
a
result
of
tube failure,
reference should be made
to
the voltages
on
the socket voltage chart below.
Use a 20,000 -ohm per volt meter, except where values
are
marked with
an
asterisk
(*),
where
a
VTVM should be
used.
All voltages were measured with
respect
to
chassis ground. Filament voltages
are
marked
"f".
Waveform
pictures and
a -c
voltage amplitudes
are in Figs.
9
through
13.
The volt-
ages should be measured with
a
noncomposite
0.5 volt video input
signal.
pin
Tube
1
2
3
4
5 6
7
8 9
Vl
-
25.5-, 29.0
f f
-
133.0
-
178.0
V2
275.0
61.8-,
60.0
f f
266.0 61.8*
60.0
-
V3 175.0 -0.45* 1.8
f f 280.0 157.0
159.0
-
V4
0.45* 2.0
f f
157.0
170.0
2.0
-
-
V5
-
-2.1*
0.0
f
f
-
120.0
-
142.0
V6
162.0
-8.0* 0.1
f f
162.0 157.0
f
280.0
V7
1.0
1.2 f f 0.1
-
1.2
-
v8
-0.05*
1.5 f
f 188.0 130.0 1.5
-
V9
280.0
128.0*
132.0
f f
132.0 128.0
f
280.0
V10
127.0
-3.6*
0.0
f
f
0.0
-3.6',
f
127.0
V11 183.0
-16.2-, 0.1 f
f
165.0
0.32-,
1.5
f
V12
162.0
20.8-,
23.0
f f 1.2
-112.0* -105.0
-
V13
247.0
-0.5* 4.6
f
f
255.0
-1.6-, 4.8 f
V14
93.0
-0.02* 1.3
f f
93.0
-0.02-. 1.3 f
V15
0.0
-26.7* -0.5 f
f
-0.5
-26.7* 0.0
f
V16
220.0
0.0-,
3.6 f f 220.0
0.0* 3.1
f
V17
0.2 -35.0* 0.0
f
f
0.0
-35.0;
0.2 f
V18
213.0
0.0* 2.2
f f
192.0
-26.2-,
0.0
f
V19
195.0
0.05*
2.4 f f 185.0 -28.0* 0.0
f
V20
1.9 127.0
7.5 1.9 127.0 7.5
f
f
V21
104.0 4.8
7.5 f f
113.0
-2.7
0.0 f
V22
220.0
0.0*
2.9 f f
205.0
0.1*
3.9
V23
-
5.9
f f 210.0 220.0
0.0
V24
0.0
-110.0
-
-110.0
0.0
-
-110.0
13