Zero is probably not low enough. try -1 or -2. there is probably
overshoot that is not showing up on the meter..
Alpha quotes the max drive levels at 50-55 watts, so the power must be
a little higher than you are thinking?
w9Ray
Rod Brink wrote:
Am having problems operating a SDR-1000 in ESSB mode into my new Alpha
8410. The amp frequently faults on voice peaks in spite of a much
reduced drive level. I looked at my peak power into the amp using a
fast peak-reading wattmeter (LP100A). Most of the time the power peaks
are in the 10-15 watt range, but on some words the peaks are much
higher, 30-40 watts. I turned up the mic gain to get 0 dB ALC readings
and turned down the drive to compensate, thinking that would resolve the
problem. It helped but didn't completely do the trick. Next I
decreased the ALC attack time to 1 ms. That doesn't help either, nor
does changing the ALC Decay and Hang times.
The Alpha fault-detection circuits are very fast acting. I complained
to them about it, but to no avail. They seem to think it should be that
way.
As a matter of personal preference, am running an earlier version of
PSDR (v. 1.12.1). Have any improvements been made to ALC in subsequent
versions?
73,
Rod KQ6F
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