The band switching scheme never arced and worked fine except for
being a little confusing at 0200 local time! As I recall it was A
(tune) and A (load) for 40, A+B and B for 80, A+B+C and A+C for
160... or something like that. You may have heard that amplifier
Gerald. I used it on 14.345 / EME Net for years.
Your scheme sounds much simpler to operate.
The only thing that arced in that amp was the plate choke. It was
wound on a ceramic tube salvaged from a defunct 200 watt wire wound
resistor. It seems the inside of it was painted or coated with
something that conducted RF quite well. Eventually I was able to
clean all that out, and the plate choke is still in use today, in a
different amp.
73
Paul N1BUG
TexasRF@aol.com wrote:
> Now that band switching scheme shows some real innovation! I bet it
> never arced did it?
>
> I once built an amplifier that used a plexiglas disc/cam that pushed
> on scavenged relay leaf/contacts in a similar manner, one cam per
> contact. Ugly but worked well. Allowed switching cap A, cap B, cap A+B
> and so on. Your screw driven switches would do that also of coarse.
>
> 73,
> Gerald K5GW
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