Heathkit SB-401 Assembly Manual page 138

The Transmitter is now properly loaded for
maximum CW performance at the chosen oper-
ating frequency.
For Single Sideband operation, change the MODE
switch to either USB or LSB, and adjust the
LEVEL control. Use the following chart for the
initial setup for SSB operation.
For final adjustment of the Relative Power con-
trol, refer to Figure 1-2 (fold-out from Page 86).
SWITCH OR SWITCH OR
COMMENTS
CONTROL CONTROL
POSITION
I-
A.
FUNCTION TRAN or TReV
B.
MODE TUNE
Adjust LEVEL control for approximately .5 ma (midscale)
with METER switch in GRID position.
C. FINAL tune
Turn the METER switch to
REL PWR and adjust for
•
indication
maximum meter
(plate current will be
approximately 220 rna).
D. DRIVER
Adjust for maximum re
.ttve
power meter reac -
•
Then turn METER switch to PLATE. (Ip mg,
should be about 220
ma.)
E. REL PWR
Set METER switch to REL PWR and adjust for a half-scale
ADJUST
reading when fully loaded on the 3.5 band.
F.
MODE CW
G. LEVEL Key the Transmitter and quickly adjust the LEVEL control
onlr to the point where meter reading ceases to increase.
H.
FINAL LOAD Adjust for maximum meter reading.
I.
Repeat steps C, D, and H.
J.
Key open.
.
Close the key and adjust the LEVEL control for a meter
K. METER GRID
reading of approximately .5 rna.
L. LEVEL
Key the Transmitter and adjust for approximately 0.5 rna
meter reading.
Tune up the Transmitter as follows:
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