The discussion is interesting, but is very speculative.
Referring back to the ideas of our Dutch friend (radiofun232), it seems to me that his idea of maybe 1 or 2 BJT followed by a FET with a sprinkling of ceramic filters is a "minimal-effort" thing to try. If it didn't prove to be a great outcome, it could well be very informative. Anyone want to critique that approach, ideally in a way the at the 'hams' can understand
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B