Alpha Power Alpha 89 - Tuneup for Peak RF Output > 1,500 Watts; Tuneup for RF Output 1000-1400 Watts; Final Tuneup Double-Check; Alternate Tuneup Procedure (No TUNE Indicator)

will not deflect from its resting position with less than 5-8 watts; until the amplifier is properly tuned, applying
more than 15 watts may cause a protective TUNE fault.)
b) Adjust TUNE control to move or "dip" the TUNE bargraph LED as far to the left as possible.
c) After step (b)...
1) If the TUNE indicator is to the left of the desired (mid-scale "V") position, adjust LOAD clockwise
until the indicator moves to the desired position, OR...
2) If the indicator is to the right of the desired position, adjust LOAD counter-clockwise instead.
d) Repeat steps (b) and (c) until the TUNE indicator is positioned as desired. See para. 7.5 for final tuning
check.
7.3 Tuneup for peak RF output greater than 1,500 watts a) Follow steps 7.2
a) through 7.2 d) above except make final adjustments so that the second or third LED to the right of
the mid-scale "V" mark is lighted.
b) See para. 7.5 for final tuning check.
7.4 Tuneup for RF output of 1000 to 1400 watts a) As above except make final adjustments so the first or
second LED to the left of the "V" is lighted. b) See para. 7.5 for final tuning check.
7.5 Final double-check of tuneup adjustment (perform after completing 7.2, 7.3, or 7.4 above)
a) Briefly increase drive power until amplifier grid current just reaches its normal peak value of 35-50 mA; note
RF output.
b) If output is close to desired value, tuneup is complete.
c) If output is greater than desired, reduce LOAD control setting very slightly and repeat steps (a), (b), and (c).
d) If output is less than desired, increase LOAD setting slightly and repeat this section.
7.6 Alternate tuneup procedure not using TUNE indicator
a) Preset ALPHA 89 controls per "tuneup settings", page 14.
b) Slowly increase transceiver output to 25-30 watts. Adjust amplifier LOAD control to maximize RF output.
Then adjust TUNE and LOAD alternately until no further increase in output can be obtained.
c) Carefully adjust transceiver output until amplifier grid current just reaches but does not exceed 3550 mA and
note amplifier RF output. Then proceed to c) or d) below, as appropriate.
d) If RF OUTPUT after step c) above is less than desired...
1) Increase LOAD setting until grid current drops below 35 mA.
2) Adjust TUNE control to maximize Ig.
3) Repeat these sections c) and d) as necessary, until desired RF output is achieved with 35-60
mA Ig,
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