OR
e) If RF OUTPUT after step c) is greater than desired...
1) Reduce transceiver drive until Ig drops below 35 mA.
2) Reduce LOAD setting until Ig rises to about 45 mA.
3) Adjust TUNE for maximum Ig.
4) Repeat sections c) and e) as necessary, until desired RF output is achieved with 35-50 mA 1g.
CAUTI0N! If, during operation at or below desired power on any band, the grid current exceeds 70 mA, turn
LOAD to a higher setting (to increase loading) and then adjust TUNE for maximum RF OUTPUT Repeat if
necessary until peak grid current at desired output does not exceed 50-60 mA.
IMPORTANT: As the final tuneup step, always adjust TUNE for maximum RF output.
7.7 - TUNING NOTES
a) At resonance, plate current is minimum (dipped) while grid current and RF output are at or very near maximum
(peaked).
b) Increasing the TUNE control dial reading increases tuning capacitance.
c) Increasing the LOAD control dial reading decreases loading capacitance; this is because decreasing capacitance
increases actual loading.
d) Excessive grid current can be corrected by reducing transceiver output or increasing amplifier loading.
e) FCC rules do not permit new amateur amplifiers to be operable on 24-30 MHz as delivered within the U.S. &
possessions. U.S. owners who send a photocopy of their authorizing amateur license to ETD customer service will
be provided information on "unlocking" 12 and 10 meter coverage. (ETO is not permitted to perform this very
simple operation for you.)
TUNEUP SETTINGS
MHz TUNE LOAD
1.9 50 30
3.7 77 57
7.2 45 40
10.1 22 65
14.2 22 65
18.1 47 82
21.2 32 86
24.9 44 84
29.0 12 90
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