I unask the first question (how to raise K2 output power). But in
self-defense,
I knew that:
PAs have better distortion properties with higher supply voltages
14->20W is about 1 dB but 10->20W is 3.01 dB (3 dB MATTERS!)
operating above 10W on ssb with the K2 was not a good idea as
designed
and I would only do so in a true emergency
the PA devices would need to be replaced
the PA output network would need to be redesigned completely
the driver stage would need to at least have a huskier device
the existing K2 PA heatsink method may be marginal already
I would be barraged by nay-sayers
but I did not know that the MCU was so tightly involved in power level
control.
Purchasing the new 100W amp from Elecraft wouldn't meet my needs for at
least
three reasons:
for the same $$$ I could get a used Herc II !!
fails the one box test
would be much less efficient at 20W than a solution designed for
20W
I am still looking for a known solution to the relatively low RX audio
issue.
While buying the K2 audio filter module would work, it is an expensive
option.
(Does anyone have a used KAF2 laying around?)
Now as a well-known QRPer (KU7Y) often says
"now back into my hole"
--
73 Allan K7GT
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