----- Original Message ----- From: "Nigel Orr" > Three things: > 1) Check that there is no DC component on the signal which you are sending > to the headphones. If a blocking capacitor is dying, you might get DC, if > you get DC even a clean pot will sound like that. It's quite common on old > audio equipment, but less likely if you have tried the headphones plugged > into several different sources. Actually, these are wireless headphones, so the AC is reliant on the RF receiver circuit. > 2) I have had success in the past cleaning pots by carefully disassembling > them first then using a mild solvent to clean the track. Sometimes it is > completely worn away, so that won't help Well, not really feasible in this case, without breaking the pot. probably easier to replace it. I'm sure Digikey sells something that'll work - it's a standard size. > 3) I've seen and replaced several pots where some form of 'cleaner' had > been squirted in, it's not usually a good idea unless you are prepared to > use gallons of the stuff (a little bit will often wash some abrasive muck > onto the pot track where it will appear to be fixed but do more damage > after a short time) and reapply any required lubricants afterwards to the > pot mechanism. I tried some WD-40 as Jinx suggested and it worked really well. I don't even have to open the case to get the lube into the pot. I'm planning to make it a monthly ritual until the pot finally does give up the ghost, whereupon it's pretty easy to replace. - Robert -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics