[s-cars] Radio schematics?

[Igor Kessel]

Kirby Smith wrote:
> Once upon a time, the electronics solvent collection available from your 
> local supply included volume control lubricant.  Tuner cleaner may not 
> be optimal for your purpose, at least for the final squirt.  However, if 
> the real problem is not a dirty potentiometer wiper, but instead a blown 
> interstage capacitor, changing the volume may be changing a dc voltage 
> too, and that is very likely to be noisy (and not repairable with solvent).
> 
> kirby
> 
> 
> Marc Gorelick wrote:
> 
>> As long as this has turned into "Radio Day," how about a fix for a 
>> loud popping sound whenever I change the volume on the stereo? I 
>> talked to another local S4 owner who tells me that tuner cleaner 
>> didn't fix the problem in his car.
>>
>> Pity, since this seemed the obvious solution and I already have some.
>>
>> Marc
>>

Kirby,
Once upon a time, namely back in my radio amateur days in the early 
1970-s no special electronics volume control lubricant was available in 
the old Soviet Union. I used to take a potentiometer apart, rub a soft 
pencil over the horseshoe shaped resistive track so that a nice fat 
layer of carbon was left on the surface, after which I would add a 
droplet of spindle oil on top of it. This would not fix the 
potentiometer permanently, but it would none the less buy a few mos of 
service for the volume control.

-- 
Igor Kessel
two turbo quattros