SW-717 hum - like the 1680?

[myname]

I've been following the thread about Bruce's humming HR-1680 and it reminded
me that I have a SW-717 that has a very annoying hum that seems to be
related in direct proportion the strength of the received AM carrier:  no
station, no hum-- big SWBC signal, big annoying hum.  Is this the nature of
the beast?  Might it have something to do with the AGC line?  I'd appreciate
any comments.

Tnx es 73
Tom NØJMY .  .

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