Table 5-2.—Operating Controls and Indicators—Continued
Control or
Indicator
Control Position
Function
MCW button
This button is a telegraph key; it enables the
operator to transmit code when the normal trans-
mitting level of his voice may reveal his position.
MCW is only obtainable when the function
switch is in the VOICE/MCW 243.0 position.
Depressed
Causes radio set to transmit a continuous tone,
receiver off.
Released
Turns transmitter off, receiver on.
VOL control
This controls the volume of the sound from
the LISTEN speaker or earphone. It controls
received signals, not sidetone.
Fully Up, MAX
Loudest sound
Fully down
Quietest sound, but radio set is not turned off.
NOTE
Volume control does not affect transmitted
power output.
LISTEN speaker
Sound of received signal is heard by placing ear
close to LISTEN speaker. Sound of MCW or
beacon transmitter may also be heard. The
LISTEN speaker is shut off when the earphone is
connected.
TALK microphone
Picks up the voice being transmitted when PUSH
TO TALK button is depressed and function
switch is set to either VOICE/MCW 243.0 or
VOICE 282.8.
Earphone jack
Earphone
Causes sound to be heard in earphone. A magnet
connected
in the earphone connector (12, figure 5-8) shuts
off the LISTEN speaker.
NOTE
Connector may be
joined to jack in
either of two
polarities.
Earphone
Sound is heard through LISTEN speaker.
disconnected
Battery cap
Holds battery in place.
5-9
