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 C2, TM 11-6625-564-45
10-mc steps, FREQ SELECT switch S2 changes
steps. The wires that are either grounded or
the receiver-transmitter frequency in 1-mc
not grounded for particular frequency selec-
tions are explained and shown in paragraphs
steps, and FREQ SELECT switch S3 changes
1-20 e, f, and g.
the receiver-transmitter frequency in 0.1-mc
1-31. Difference in Models
Difference
MK-731/ARC-51X
MK-731A/ARC-51X
Uhf test generator 1A5
Replaces vacuum tubes with
Contains vacuum tubes.
transistors.
Dummy load
Stored in transit case cover.
Mounted on removable mounting
tray.
+175 volts dc
Not used.
Used.
Chassis wiring
+27.5 volts is connected to
+175 volts is connected to uhf test
uhf test generator 1A5.
generator 1A5.
17
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