Sandy - You wrote:
"Circuitry wise, an "AGC/AVC free" S-meter is an oxymoron! Can't
have one
without the other."
Well, I have late 1950s Hammarlund HQ170 whose S-meter works just
fine with the AGC/AVC turned on or off. As far as I have been able to
ascertain, the S-meter functions identically with or without the AGC/
AVC turned on. It was designed to do so. The QST review at the time
commented on this feature.
So it is possible to build a receiver with an S-meter that functions
with the AGC on or off. It was done nearly 50 years ago. I am not
sure why receiver designers have not incorporated this useful feature
into more modern rigs.
Now I am not a fan of AGC, in fact I think the most useful feature of
a receiver with AGC is the ability to turn it off. :^)= - Dr.
Megacycle KK6MC/5
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