DRAKE TR-4C - Other Controls

OTHER CONTROLS
Right Side (not illustrated).
PHONE jack: Provides a connection for head-
phones or external speaker.
MIC jack: Provides a connection for microphone.
Mates with connector S-230 furnished with the
TR-4C.
VOX control: Adjusts the gain of the VOX am-
plifier and the antenna relay release time on
cw.
ANTIVOX control: Adjusts the gain of the
ANTIVOX amplifier.
ZERO control: Adjusts the no-signal display of
the S meter to Sl .
KEY jack: Provides a connection for CW key.
With key connected, transmitter is disabled for
all modes of operation and receiver is disabled
for AM unless the key is closed.
Left Side (not illustrated).
RCVR/TCVR switch: Selects either the TR-4C
Receiver or external receiver.
Rear Chassis (Refer to figure 2-2).
Ground terminal:
Provides a connection for
earth ground.
_
SIDE TONE control: Adjusts the level of the
CW sidetone with respect to the received signal.
For no sidetone, rotate fully counterclockwise.
LIGHTS switch: Changes intensity of dial lamps
to dim
(D) or bright (B).
Antenna connector: Provides a connection for
the station antenna (SO-239).
Power connector:
Provides a connection for
either AC-4 or DC-4 Power Supply.
External Receiver Antenna jack: Provides a con-
nection for an external receiver.
External Receiver Mute jack: Provides a connec-
tion for muting an external receiver. It may be
used with any receiver which requires a DC
path to ground for receiving and an open cir-
cuit for muting. All R. L. Drake receivers have
this feature.
NOTE
Rear chassis markings
above the CAU-
TION notice identify external cable con-
nectors when TR-4C VHF Modification
Kit is used.
3-4