Wayne,
Congrats on what looks like a very well-designed amp. I've been waiting on
an amp with these features for a very long time. Of particular interest to
me is your continued use of PIN diode T/R switching. Can you describe SWR
protection to the Rx PIN diodes at the 1.5KW level? I suspect that a
fast-detecting SWR switch will be the main focus of protection, as well as
HV back-biasing of the Rx diodes. An open or short RF termination requires
over 900V DC to keep Rx PIN diodes from going into conduction. Can you
describe this area of circuit protection just a bit?
Secondly, I know that fan noise is difficult to quantify in words. Anything
particularly innovative you're going to minimize cooling noise? Thanks!
Paul, W9AC
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