[R-390] Best approach for SSB mod on R-390A
2002tii
bmw2002tii at nerdshack.com
Fri Dec 25 23:51:11 EST 2009
Regarding my comments about the SE-3, Cecil wrote:
>that is not at all the experience I have seen nor heard from a local
>that used one for a very long time.
All the ones I've seen perform similarly. Some folks may have
tighter temperature control in their shacks than I do, so the lack of
temperature compensation may not be a practical problem for some
users. However, the need for manual guidance (intolerable in a PLL
demodulator, IMO) is no secret -- it is described on the
manufacturer's web site.
I've designed and built more than a few different PLL detectors over
the last 30 years, and the worst of the bunch performed a lot
better. There are also commercial designs that perform well. I
think the folks who sing the SE-3s praises do so simply because they
haven't used a PLL detector that works as one could (and
should). Horse-drawn buggies must seem really fast to someone who
hasn't ever seen a car. If an SE-3 fills someone's needs, fine --
but it is far from the best that can be done, and the price is
outlandish (IMO) in light of this shortfall.
Best regards,
Don
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