[Hallicrafters] Audio distortion when AVC is 'OFF'

[Don Ehrlich]

Sounds normal to me.  Without AVC a loud station will overload the
detector and cause distortion.  Turning the RF Gain down manually
reduces the gain of the RF preamp stages ... essentially what the AVC
does automatically when in the AVC ON position.

When listening to an AM station one would normally have the AVC turned
on and the RF gain all the way up.  I have never found a use for the
AVC OFF position except (and this is important sometimes) when
aligning the receiver.

Don K7FJ

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I have ''restored'' a number of Hallicrafters receivers (SX-28,SX
42,SX-43 )and also some National's.---They all run pretty well, but
show the same symptoms.----

Normally the receiver is run with the RF Gain all the way up and the
AVC in the 'ON' position.-----When turning the AVC to  'OFF',the
volume increases on the strong stations and the Audio gets quite
distorted.---this can brought back to normal (no distortion) by
turning the RF Gain down.---The point at which this happens,is very
distinct as you turn the RF Gain down.-----This symptom occurrs on all
of my receivers.

---Question,---Is this normal ????---- Or have I missed something
while ''restoring'' those Radios.---They have all been
''re-capped'',but I normally leave the resistors alone and check the
tubes by substituting with others I have in the Junkbox.