k7fm wrote:
> "In other words, if an amp already meets FCC specs for IMD, what does
> a five or ten dB improvement get you?"
>
> I thought the FCC specs were only that the amplifier be clean enough to
> stay in the ham phone band. I can easily tell the difference between an
> amp that is "average" with about a -30 db 3rd order distortion and a
> really clean amp that is -40 db 3rd order distortion - and as a neighbor
> of a ham that is about a -20 db level, I can vouch for being near the
> one that is cleaner. The difference is light night and day if you are
> close by. I would much rather be near an amp that exceeded the norm.
>
> Most amateur amps do not meet the commercial standard for distortion
> products - which may be a recognition that we are "amateurs" and not
> technically able to meet commercial standards. Hooray for those that do
> want a cleaner amp.
Whether it's amplifiers, car exhaust or personal hygiene, clean is lost
when surrounded by dirty. Change the balance bit by bit, and suddenly
dirty stands out like a sore thumb.
Steve
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