line is amplified by three audio stages, V10, V11,
TXC-1C and -1D use 26 tubes, 19 of which are
and V12, before it reaches the loudspeaker. The
located in the facsimile transceiver and 7 of which
GAIN control is in the voice circuit. When the
are located in the rectifier power unit. The follow-
STANDBY-MON-TALK switch is at TALK, the
ing chart shows the stage number, type tube used,
loudspeaker becomes a microphone, and the signal
and the functional name of the stage.
is amplified by V10, V11, and V12 before it is
a. Facsimile Transceiver TT-1(*)/TXC-1.
fed to the line.
(1) Fork oscillator unit (unsealed).
Facsimile Sets AN/TXC-1, -1A, and -1B use
used only in Facsimile Transceivers TT-1/
25 electron tubes, 18 of which are located in the
TXC-1 and TT-1A/TXC-1, up to serial num-
facsimile transceiver and 7 of which are located
(3) Motor circuit.
(4) B+ voltage regulator.