dual ganged pot DC isolation?

Started by bufferz, February 27, 2014, 05:24:58 PM

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bufferz

I was thinking about using a 10k dual ganged pot to do the following:

gang #1 wired as a trim in series with a 1k resistor to control a LED CLR value
gang #2 for an array of common audio applications

will the dc voltage applied to one gang be isolated form the other? - or shoud I be expecting a scratchy sound coming my way?

Cheers

tubegeek

They turn on the same shaft but the two sections are not connected electrically in any way.

I suppose it's possible, if the pot value was very high in one section and the signal through the other section was very, very large, it might cause crosstalk, but not at the audio levels you're talking about. Even tweakazoid audiophiles haven't complained about this one.

DC or AC, same situation. You'd need a voltage sufficient to break down the insulation inside the dual ganged pot to have DC leakage, and I doubt you're looking to run your stuff at 500 V.
"The first four times, we figured it was an isolated incident." - Angry Pete

"(Chassis is not a magic garbage dump.)" - PRR

bufferz

Thanks, that's what I was hoping was the case