[Boatanchors] NC-183D

[Al Klase]

Ron,

Sure sounds like a classic AVC problem.  Open up R-41.  The AVC bus 
should then be infinite ohms to ground.  If I had to guess, I'd expect 
leakage in the .001 mica grid caps on the RF stages.  You can read my 
whole AVC blurb at:  http://www.skywaves.ar88.net/commrx/Maintenance/agc.htm

Regards,
Al

w6om at cox.net wrote:

>Here we go again gents, this time it is an NC-183D. The issue is when the RF gain control is advanced past the 80-90% range the audio goes into distortion.
>RF amp supplies voltage to AVC so one would logically look at the AVC circuit. I started recaping and resistoring the AVC circuit and since I had a free afternoon spent 13 hours replacing EVERY cap and resistor in the entire receiver and still the problem exisits plus the voltages look good.
>Any thoughts from the group?
>Please don't tell me it is something simple like replacing the 6AH6 AVC tube..Pleeese don't say that....
>
>Ron Weaver - W6OM
>
>
>  
>

-- 
Al Klase - N3FRQ
Flemington, NJ
http://www.skywaves.ar88.net/