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Topic: Cleaning Volume Control - Scratchy booth monitors
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Manny Knowles
"What are these things and WHY are they BLUE???"
Posts: 4247
From: Bloomington, IN, USA
Registered: Feb 2002
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posted 05-19-2002 01:52 PM
Okay...this is a continuation of a discussion on cleaning volume control knobs (from the "favorite booth monitor" thread).Can somebody please explain what "contact cleaner" is really designed for? Is this one of those WD-40 type products that a lot of booths have, but shouldn't? Or is there a use for it in projection booths? Just in case somebody is reading this years from now, two products were recommended for cleaning scratchy volume control pots: Deoxit Nutrol ------------------
~Manny. Now...where was I ? Leonard Shelby, MEMENTO.
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Aaron Sisemore
Flaming Ribs beat Reeses Peanut Butter Cups any day!
Posts: 3061
From: Rockwall TX USA
Registered: Sep 1999
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posted 05-19-2002 02:17 PM
Contact cleaner is a harsh fast-evaporating solvent (usually CFC or HCFC based) designed to remove all oxidation and foreign substances from electrical contacts. It also removes oils and lubricants, including silicone gel as used in potentiometers. Once the wiper is directly contacting the bare unlubricated carbon strip in the pot it will gall up and the pot will sieze in a short time.I wouldn't say it is as common as WD-40 in a booth- most booths don't have any such cleaners, nor a real need for them. The only real uses for a nonlubricating contact cleaner in a booth would be switch contacts or plugs and sockets. There is another type of cleaner called 'Tuner Cleaner' that was originally designed for spraying into the rotary type TV tuners of old. It is not as common to obtain as it used to be, but some versions of it had a lubricant in them. Some non-lubricating contact cleaners may be incorrectly labeled as a 'Tuner Cleaner' Be Careful. Some examples of the harsh contact cleaners: Blue Shower Radio Shack Contact Cleaner/Degreaser Caeon In response to the DeOxit question you can use either the spray or the liquid. If I need to use the stuff in a precision fashion, I usually spray some into the cap and use a syringe or Q-Tip to apply it.
-Aaron
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Paul G. Thompson
The Weenie Man
Posts: 4718
From: Mount Vernon WA USA
Registered: Nov 2000
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posted 05-22-2002 10:40 PM
When I was visiting Mark Gulbrandsen, he told me of some kind of cleaner that works great on potentiometers. I forgot what it was.But you have to watch out using some contact cleaners, as it can attack plastic and leave you with a pile of goo.
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