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SECTION IV
TYPICAL VOLTAGE AND CURRENT CONDITIONS
OF BC- 250GY -1
TRANSMITTER
These readings
are
average and subject
to
variation:
(a)
-
6L6G Audio Driver
(b)
-
Modulators
(c)
-
M5422 Oscillator
(d)
-
813 RF Driver
(e)
-
Power Amplifier
Plate Voltage
Screen Voltage
Total Cathode Current
Cathode Voltage
Filament
Plate Voltage
Total Static Plate
Current
(M2)
Bias (approx.)
Filament M7
Plate Voltage
Filament
Ilate Voltage
Screen Voltage
Cathode Current
(M6)
Plate Voltage
(M5
Plate Current
(M4
Filament
Grid Current
(M3)
(f)
-
Line Current
(M1)
(250
watts output)
250 ohm load
72
ohm load
50
ohm load
330
V.
230
V.
110 MA.
14
V.
6.3
V. A.
C.
1400
V.
50
-
60
MA
-32
-
-36
10
V.
A.C.
145
-
160
V.
6.3
V.
A.C.
1400
V.
350
-
400
V.
120
-
160 MA.
1250
-
1350
V.
246
MA.
(typical
only, will vary)
10
V.
A.C.
70
-
120 MA.
1
amp.
1.84
amp.
2.24
amp.
Conclusion
A radio broadcast transmitter, regardless
of its size, cannot be
fully described in
an
instruction book such
as
this
as to
every
possible condition that may arise in the process
of
installing
and
placing
into operation.
There have been provided on the
following pages, »numerous drawings showing
the
entire transmitter
construction
and also pictures showing the parts
as to
their
location in the transmitter.
In
preparing
the
instruction book
it
has been recognized that the installing engineer
undoubtedly
9/11/63
-16-
BC- 250GY
-1
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