Pat,
I cannot find the schematic of the HF Packer amp to verify this, but my
suspicion is that the input impedance of the amp might be changing with the
level of drive signal. This change will occur rapidly of course in the case
of SSB.
If this is the case then distortion could result either
Did you contact Virgil about this? He has always been very helpful
with the Packer amp and related problems.
John
K2QY
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Help:
A friend recently dropped off his K2 and HF Packer amp for me to
troubleshoot a problem -- he was getting poor quality SSB reports on
the air when he ran his K2 through his HF Packer amp. I had built
both kits and had tested them separately so I was a bit skeptical
that there was anything
Oops! I forgot to mention that one K2 uses a Kenwood mic while the
other has an Elecraft (Heil?) mic. The monitored signals of both
radios run barefoot sounded close to identical. Consequently, I've
ruled out the microphone as the source of distortion.
73,
Pat VE3EUR
Pat,
Are you using a common power supply on the K2 and the Amp?
If so, try using separate supplies and see what happens. If the problem
does not present itself, you can conclude that SSB modulation of the V-
power supply line is the problem. See the discussion that appeared on
this
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