13
approximately 2900 - 3200 volts.
4. Make sure your transceiver has been turned on and its drive level control has been set to
minimum.
5. Turn the Band Switch to the same band as you have selected on the transceiver. Then preset
the Tune Control and the Load Control to the positions indicated in the above chart for the band
you have selected.
6. With the transceiver drive still at minimum, set the Multimeter Switch to Plate Current (IP). The
0 to 1400 ma scale should indicate zero. Now set the Operate/Standby switch to the Operate
position.
7. Key the transceiver (with no drive applied) and observe the plate current on the 0 to 1400 ma
scale. The plate current should read approximately 160 ma. more or less.
8. Apply only enough drive to obtain 50 ma of
grid current
and no more than 400 ma of
plate
current
. Now tune the Tune Control for maximum grid current. Unkey the transceiver. NOTE: It
is normal for the plate current to dip (be reduced) when you have maximum grid current.
If the
grid current goes over 200 ma, immediately reduce the drive.
9. Again key your transceiver and observe the peak RF watts on your wattmeter. Adjust the Tune
Control and Load Control for maximum output on your wattmeter. This is accomplished by going
back and forth between each control.
10. Increase the transceiver drive until you obtain 250 ma of grid current. Now readjust the Tune
Control and Load Control for maximum output. The grid current should decrease.
11. Increase the transceiver drive for 200 ma of grid current. Then readjust the Tune Control and
Load Control for maximum output power. The output should now be around 1200 watts with 120
watts of transceiver drive power.
12. Apply only enough drive to indicate either 1200 watts of output power, or 160-200 ma of grid
current. Repeak the Tune Control and Load Control. Note: The grid current, plate current. and
output power must not exceed the following limits:
Grid current
220 ma
Plate current
800 ma
Output Power
1200 watts
13.
When you operate in CW, reduce the drive power until the plate current is 700 ma or
less. Also when operating RTTY or SSTV, reduce the drive power until the plate current is
600 ma or less.
The Amplifier is now fully loaded for operation on CW, RTTY, or SSTV.
SSB Procedure
