HI,

I'm new here and new to Elecraft. I have to KPA/KAT500 combo and love it! I
do have a question about PA current though...

On all bands except 20, when running full power out, my HV sits around 64v
and PA current is stable between 10 and 12A. FAn takes it's time coming on
and amp just loafs along. On 20, however, even at lower power output levels,
the PA current is high and the fan comes on and steps up quickly! At full
500W out on 20, HV is 62v and current runs as high as 16A! Even at 300w out
the current runs around 13A, higher than any other band at full 500w out.

Question is, is this just how it is or do I have something amiss on 20m?
Antenna is doublet 60' in the air and this antenna is the one I use on 80,
40 and 20, so don't think I can blame the antenna. Tuner loafs along during
all this, and SWR is no worse than 4:1 on any of these three bands.

Harry W4HWD





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