Hi,
The problem is solved. After thinking about it for a while, and not having the PIC's data sheet, I wondered if the AGC signal was an open collector / drain type. It turns out that pin 1 of the resistor network had never been soldered in by the builder...not me (the builder knows who he is).
Upon soldering pin 1, the fast and slow modes of the AGC work fine AND the QSK problem (that I posted about a couple of weeks ago) was cured, too.
Now everything seems to work properly.
Mike, WA1SEO
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