Heathkit SB-401 - FREQUENCY SHIFT ADJUSTMENT; FINAL TRANSMITTER ADJUSTMENT

Page 102 [erg aarsrs] HBATHEIT
(_) While holding the LMO shaft, with a screw-
driver, turn the circular dial back to zero,
( ) Without disturbing the zero beat setting,
tighten the circular dial setscrew, Be sure
the circular dial is set at zero,
{( ) Replace the LMO DIAL knob on the LMO
drive shaft,
( ) Turn the FUNCTION switch to the STBY
position,
FREQUENCY SHIFT ADJUSTMENT
(
( ) Turn the FUNCTION switch of the Trans-
mitter to the SPOT position.
~~
Turn the LEVEL control1/4turn clockwise,
( ) Turn the Transmitter MODE switch to USB.
( ) Turn the receiver MODE switch to USB,
—
~~
Talk into the microphone and tune the
Receiver until you hear your voice and it
sounds natural,
( ) Change the Receiver and Transmitter to
LSB without disturbing their frequency
settings,
RUBBER FOOT
76 FLAT WASHER
6-32x3/4" SCREW
( ) Adjust the FREQ SHIFT slug on top of the
Transmitter LMO until your voice sounds
natural in the receiver,
( ) Repeat the previous four steps as often as
necessary until there is no change in your
voice in the USB and LSB modes of the
Transmitter and receiver,
( ) Turn the FUNCTION switch to STBY.
FINAL TRANSMITTER ADJUSTMENT
( ) Tune the Transmitter to full REL PWR output into a 50
Q dummy load on the 3.5 band. Refer to steps B
through T on Page 114. Then return to the steps below. °
( ) Turn the METER switch to GRID.
( ) Set the LEVEL control for a usable grid current
indication.
( ) Peak the 3.5 HET OSC coil for a maximum meter
indication. If necessary, keep the meter needle on scale
with the LEVEL control.
( ) Repeat the two preceding steps at each BAND switch
position.
( ) Turn the FUNCTION switch to OFF and
unplug the line cord,
This completes the alignment of the Transmitter,
Refer to the Final Assembly section,
LOOSEN
THESE
TWO
sc
REWS
TO
LIFT
COVER
F
REPLACMENT OR TUBE
Figure 3-2