[Boatanchors] How to clean AB pots?

[Garey Barrell]

You need to find (or make) a tool like the one Quietrole used to sell 
about 50 years ago.  It was a piece of brass tubing with the inside of 
one end threaded to fit on the bushing of a pot.  The other end had a 
plunger operated by a knob that forced "pot cleaner" (mostly carbon 
tetrachloride) around the shaft seal of the pot.  Kind of a syringe with 
a BIG needle!  :-)   A real timesaver for the Radio - TV Repair guys.

You might be able to force-fit a piece of poly tubing over the bushing 
threads, then fabricate some sort of pressure device, but the A-B pots 
are pretty well sealed.  Might take a lot of pressure to get anything 
past the shaft seal.

Else you might be able to punch a small hole in the housing, (not drill, 
for obvious reasons,) and spray in some CAIG CaiLube/MCL.  If you can 
get it in there, it will clean and make them feel like new!

73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 4-B & C-Line Service Supplement CDs
<www.k4oah.com>



Wa4uso at aol.com wrote:
> What is the easy way clean AB pots? I have several receivers that use these 
> pots and removing the front panel, i.e., R-388 or sp-600, is a lot of work just 
> to clean a noisy audio gain control. Got any tricks. 73 WA4USO Darrell Darby
>
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