Heathkit SB-1000 - Power On Procedure

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IMPORTANT: This Amplifier is intended for
intermittant service only. Do not operate the
Amplifier continuously for more than a few seconds
ata time.
14. Set the exciter for minimum output. Then key
the exciter.
ae 15. Increase the drive until you have about 5 to 10
watts of drive on the external wattmeter.
b 16. Adjust the PLATE and LOAD controls for
maximum indication on the Multimeter.
Uw ) 17. Use the coil alignment tool to adjust coil L1 for
a minimum indication on the wattmeter (set to
indicate reflectedpower).
d 18. Increase the drive in 4 or 5 watt increments up
to 15 or 20 watts of forward power while you
readjust the PLATE and LOAD controls for
maximum indication on the Multimeter.
w4) 19. Readjust coil L1 for minimum reflected power
on the wattmeter.
4 20, Unkey the exciter and set it for minimum
output.
Heathkit
oh Repeat steps 9 through 20 for each position of
the BAND switch. NOTE: Table 8-1 shows
the frequencies you should use and the
approximate settings of the PLATE and LOAD
controls.
22. Connect an accurate wattmeter between the
Amplifier's RF OUT socket and the dummy
load. Make sure the wattmeter can measure at
Teast 500 watts.
Y 23. Adjust the exciter and Amplifier for approx-
imately 500 watts of output on the 20-meter
band.
CAUTION: Be vary careful when you adjust the
control on the meter circuit board in the next step.
The high voltage filter and rectifier circuit boards
are in this area and high voltage is present.
24. Use the control alignment tool to adjust control
R204, on the meter circuit board, until the
Multimeter indicates the same power as the
external wattmeter.
JY 25. Unkey the exciter, if this has not already
been done. Then turn off the exciter and Ampli-
fier.
This competes the "Initial Tests And Alignment."
Table 8-1 (Cont'd.)
BAND
SWITCH
FREQUENCY PLATE
{in MHz) CONTROL
LOAD
CONTROL
COIL
[se