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I have a ARC SP8 MKII preamp, but the volume pot is a little noisy with I change volume from 7 to 10 o'clock position. Any advise on how to cleaning the volume pot without taking it apart?
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HI,
I just finished cleaning all the pots on my ARC SP-11 preamp. I used Caig Labs Deoxit D5 in a spray can. Works like a charm. No need to remove or replace the pots. Just spray through the lead opening and rotate the shaft fully several times. Zippo, job done.You can buy D5 from MCM Electronics. It's the only contact cleaner that is worth spit. It really works and lasts a long time. I used it professionally in my high end repair shop for years. I'm surprised no one else mentioned D5.
Older style potentiometers have a round metal outer case which always has a gap or opening where the terminal wafer is located; use the spray can nozzle extender to apply a bit of special electronic control cleaner thru this opening to the innards & rotate control back & forth several times to swipe internal surfaces clean. Newer plastic encased controls may be sealed, making DIY cleaning difficult or impossible. Never attempt to apply cleaner via the shaft bushing; that will not succeed & may flush shaft lubricant making control difficult to turn.
Hi
Are you sure its the pot? I had a noisy pot on my Audionote M3 preamp. It turned out to be leaky paper in oil caps in my DAC sending some DC. To check it out, does it do it on all sources? If not I reckon it's a cap leak.
Without knowing what kind of pot it is, I cannot really say. The best thing to do would be to call ARC and order a new one. Potentiometer noise usually indicates wear as particles from the resistive tracks wipe off.
I remove such pots. and ultrasonically clean them. Then I lubricate it internally with 3M silicone spray, which is the best. I clean the pins afterwards to remove any silicone which may be on the pins to eliminate soldering difficulties.
You probably do not have an ultrasonic cleaner, so a good contact cleaner may suffice. Again the best way is to remove the pot. to clean it.
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