ken scharf wrote:

What he claimed was that the conversion gain dropped to unity above
that frequency. That doesn't mean it isn't a good mixer at 50mhz.
Diode ring mixers have a unity (or LESS!) conversion gain, yet they
are very good mixers.

I get useful conversion gain at higher frequencies (though it's reduced) and
it's easily compensated for by the AGC. I found that I needed fairly
consistent IF signal levels for best performance of my crystal filters.

I appreciate the conversion /loss/ of diode ring mixers, but I find that
amplifying, then attenuating, then amplifying again tends to introduce
additional unwanted noise that can be avoided by use of a sensible gain
distribution. Diode mixers also don't handle very large signal levels very
well, and can produce some very strange results when over driven! I can't
really understand the love that some designers have for them.

My newer design approach is to use a switching ring of FETs, but the results
still can't match up to the 7360.

Bob