Actually, given my previous post, anyone familiar with all that is mentioned
in it can deduce how to build the diode driver and probably get lucky
choosing the op-amp. I want to keep it under the hat I haven't got for now,
but if someone comes up with it independently, go for it, I just hope it
gets shared and not patented. People say no way 200 KHz analog
proportional mod out of an LM317 as diode driver, but I'm fairly certain it's
viable. LTspice certainly thinks so, and its output matches what I've seen of
real output so I think I believe it. Not an antenna thing, so I'll leave it
there. Nice to be able to talk of it though. Keeps it alive somehow.