The cause for this is the use of 12V finals. It would be much improved
by moving to 24 or 50V finals.
Move the /K3s II/ to 50V finals, say a pair of MRF 150's, limited to 150
or 200W max output. Design/Sell an outboard 50V switching supply capable
of 15-20A continuous current, with a 10A 12V switcher built in for the
rest of the radio.
On 10/14/2016 1:33 PM, Bill Leonard N0CU wrote:
I would not expect the synthesizer (old or new) to be a contributor the IMD
issue. Hopefully someone will correct me if that is a bad assumption. To me,
the primary issue appears to be the linearity of the two RF power
amplifiers.
--
R. Kevin Stover
AC0H
ARRL
FISTS #11993
SKCC #215
NAQCC #3441
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