[Hallicrafters] S-38C Volume Control & Other probs

[Edward B Richards]

Hi dick;

I would use a 1 meg pot. I doubt you would lose much audio. Good luck.

73, Ed Richards K6UUZ


On Sun, 05 Dec 2004 12:16:32 -0500 Richard Bidwell <rfb100 at cuisp.com>
writes:
> Hi group  --  This is my first use of this list and I hope for the 
> best.  I have a humble S-38C which a friend gave to me, "barn 
> fresh".  I 
> did the usual things like replacing a tube, changing out all the 
> paper 
> and electro caps, and cleaning it up, and it worked - kind of.  Then 
> it 
> just quit.  I  also cleaned the pot with standard cleaner but the 
> pot 
> seems beyond salvage - drop outs, noise, etc. According to the 
> schematic 
> it takes a 2 M pot; where does  one find such?  I have checked all 
> the 
> supply houses I know of - AES, Ocean State, Mouser, etc., and all 
> have 
> switch pots up to 1 M, but no 2 M.  Any solutions?
> 
> Next,  the 220 Ohm resistor that feeds the B+ line gets very hot 
> very 
> quickly indicating excessive power draw. I've checked the various 
> caps 
> in the circuit that could be leaking and they seem to be good except 
> for 
> the funny 5 segment ceramic cap that seems a bit suspicious. Is such 
> a 
> beast available anywhere or is it a matter of putting in a 
> stand-alone 
> cap if a segment is bad?  Is this kind of thing unusual or is the 
> S-38C 
> subject to any other   unique problems?  Any and all suggestions, 
> advice, guidance or anything else would be most welcome  Cheers, 
> Dick B., VA
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