[sdiy] Dead Unobtainable Concentric Pot, What to do?

James Coplin james at ticalun.net
Tue Jan 19 05:20:03 CET 2021

The concentric pot sets input and output levels.


On Jan 18, 2021, 9:51 PM, at 9:51 PM, ColinMuirDorward <colindorward at gmail.com> wrote:
>How about a two-pole, multi position switch plus mini PCB populated
>appropriate SMD resistors?
>What does the pot do?
>On Mon, Jan 18, 2021 at 10:28 PM James Coplin <james at ticalun.net>
>>   I have an Orban 111B Spring Reverb here that has had scratchy pots
>> since I bought it ages ago. It had gotten progressively worse to the
>> point that I decided it was time to open up the pots and see what was
>> up. The carbon tracks on one of the decks had worn through and was
>> flaking off. Basically, the pot is dead. Unfortunately, it's a
>> concentric 10k/500k CCW Log pot which I can't find a suitable
>> replacement for. There are other concentric pots available but not in
>> that split value -100k/100k, 500k/500k, . I really don't want to
>> the front panel out unless that's an absolute last resort. Anyone
>> any thoughts on what I could do instead to get it back up and
>> James
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