Heathkit SB-201 - Page 46

Page 46
OPERATING PROCEDURE
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Make sure the Linear Amplifier is connected to your exciter properly.
( ) Set all switches and controls as follows:
SWITCH OR
CONTROL CONTROL
POSITION
OFF-ON
LOAD 80 meter
80 meters
{:) Adjust the exciter for full CW output at the
desired frequency. NOTE: With the Linear
Amplifier turned OFF, the exciter output is fed
through the Linear Amplifier to the RF OUT-
PUT jack. Also, the REL PWR and SWR func-
tions of the Meter may be used to aid in tuning
the exciter.
( ) Reduce the drive level of the exciter to a
minimum.
() Place the Meter switch of the Linear Amplifier
in the PLATE position and push the OFF-ON
switch to ON. With no driver output from the
exciter, the Linear Amplifier meter should
show idling plate current of approximately
90mA.
( ) Advance the drive level of the exciter for a 200
mA plate current indication on the meter of the
Linear Amplifier.
SWITCH OR
COMMENTS
Linear amplifier line cord connected to
proper power source.
Or desired band segment.
segment Note desired position for antenna
used and preset next time.
Or desired band.
80 meter Or desired band segment.
segment
METER mepwe |
Adjust to keep meter pointer on scale.
REL PWR SENS FULLY
CLOCKWISE
position for antenna used
xt time.
Quickly switch the Linear Amplifier Meter
switch to REL PWR. If necessary, reduce the
REL PWR SENS control setting to keep the
meter pointer within the scale.
Adjust the TUNE and LOAD controls for a
maximum REL PWR meter indication.
Increase the drive level from the exciter to full
output.
Again, adjust the TUNE and LOAD controls for
a maximum REL PWR meter indication.
Check the GRID and PLATE meter readings. If
the grid reading is greater than midscale, re-
duce the drive level of the exciter to bring grid
current within the GRID range of the meter. If
the plate current reading is higherthan 500 mA,
reduce loading by turning the LOAD control
counterclockwise.