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41-81 AVC Problem?
#1

Last week I finished work on a 41-81 portable. I think I may have a problem with the AVC, unless maybe it just isn't supposed to work too well on this simple radio. Far away stations come in quite weakly, though I can listen to them easily by turning up the volume. Strong, nearby stations are so strong that I can hear them easily even with the volume all the way down.

I replaced all of the tubular caps, and I'm sure I replaced the resistors in the AVC circuit (a 4.7 meg and a 10 meg.) There is a 250 mmf mica in the AVC that I did not replace. I think this one bypasses what's left of the RF to ground after the detector diode and before both the volume control and the AVC.

Before I tear into it again, does it seem to anyone that the 250 mmf mica is suspect? Or should I just not expect too much from this simple, 4 tube radio? I have other old portables that don't have great AVC either, but on a modern Walkman-type, the distant and strong stations come in at about the same volume. The noise level is higher on the more distant station, as one would expect.

Any other suggestions? I can't find any other components in the AVC that I did not replace, unless it is the IF transformers.

John Honeycutt


Messages In This Thread
41-81 AVC Problem? - by Raleigh - 06-07-2010, 12:09 AM
Re: 41-81 AVC Problem? - by codefox1 - 06-07-2010, 10:28 AM
Re: 41-81 AVC Problem? - by 7estatdef - 06-07-2010, 09:19 PM
Re: 41-81 AVC Problem? - by Raleigh - 06-18-2010, 02:02 PM
Re: 41-81 AVC Problem? - by rghines1 - 06-19-2010, 02:14 PM
Re: 41-81 AVC Problem? - by Chuck Schwark - 06-19-2010, 06:23 PM
Re: 41-81 AVC Problem? - by Raleigh - 06-21-2010, 09:52 AM



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