Heathkit SB-401 - Page 7

SIDEBAND AMPLITUDE BALANCE: This con-
trol is adjusted for equal amplitude of each
sideband,
3393.6
CARRIER NULL: Balances the modulator to
eliminate carrier from the output signal for the SS INSET
USB or LSB operating mode, SV
~—
J) AA
ALC
ADJUST:
This
control
is
set
for
a
0
A
ynotar andinati vit
meter indication (ALC) with no modulation,
TONE OUTPUT LEVEL: This control is used to
set the level of CW tone suppliedtothe receiver
for monitoring the CW signal being transmitted,
3395.4kHz CW
(INSTALL IN
MIDDLE SOCKET)
ANTI-VOX: This control is adjusted so audio
output from the receiver does not trip the
transmitter VOX circuit for VOX and CW op-
eration,
VOX DELAY: This control is adjusted for the
desired hold-in time after the operator stops
talking in SSB (VOX) or keying in CWoperation,
VOX GAIN: This control is adjusted for the de-
sired microphone sensitivity for VOX operation,
FIGURE 1-Tt
witch permits the se-
nal LMO or the ex-
01 Receiver, In the
LMO in the Trans-
he Receiver operate
er, In the LOCKED
}in the Receiver con-
LEVEL: This control adjusts for maximum per-
missable (midscale top edge of ALC meter area)
modulation without distortion to the driver.
Also adjusts RF drive to the drive stage in the
CW mode,
METER: Indicates grid current 0-1 ma, final
plate current 0-500 ma, ALC maximum modu-
lation (right edge of ALC area; final plate
voltage 0-1000 volts, and relative power 0-10,
BNE ly
METER: Setting this switch to its various
positions gives the operator a quick check
of the Transmitter functions, on the meter,
3s dag ,
MODE: This switch permits the operator to
select the desired mode of operation, such as.
LSB, USB, CW and TUNE.
LMO
DIAL
KNOB:
This
knob
is
used
to
set
the
Transmitter
for
the
desired
operating
fre-
quency
of
the
selected
band
when
the
internal
LMO
is
used,