Heathkit SB-401 Assembly Manual page 135

( ) Speak into the microphone normally, using
VOX operation. Adjust the VOX GAIN con-
trol for the microphone sensitivity that you
want to turn on the Transmitter. The VOX
DELAY control should be set for the hold-
in time that is desired after the operator
stops talking.
( ) With the Receiver set to a strong station
and with proper listening level, advance the
Transmitter ANTI-VOX control clockwise
NOTE: Because all frequency determining stages
are in the Receiver, there is no error between
transmit and receive frequencies in the trans-
.ceiver mode of operation.
NOTE: The VOX DELAY and VOX GAIN controls
should be adjusted to suit your operating con-
venience.
until the Receiver audio will no longer trip
the VOX circuit of the Transmitter.
( ) Tune up the Transmitter, using steps A
through I of the CW (Transmitter Only)
tune-up chart on Page 114. The only differ-
ence is that the operating frequency is
determined by the Receiver.
SWITCH OR
TRANSMITTER
RECEIVER
COMMENTS
CONTROL
FUNCTION TRCV STBY
MODE USB or LSB
USB or LSB Receiver and Transmitter
must be set the same
BAND
Desired band
Desired band
Same band
MAIN TUNING
Desired
(LMO DIAL)
frequency
VOX GAIN
Normal setting
VOX DELAY
As desired
ANTI-VOX
Normal setting
RF GAIN
Fully clockwise
AF GAIN Used as volume control
AGC
As desired. Slow
recommended
PRESELECTOR
Adjust for portion
of band used
FINAL LOAD 50
n
FINAL tune Desired band
FREQ CONTROL LOCKED (RCVR)
Set the switches and controls of the Transmitter
and Receiver as follows:
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