Dual gang pots, different values per gang?

Prostheta · Post by **Prostheta** » 29 Sep 2011, 19:43

Grrr. Need to source or construct a dual gang pot with a 500k track and a 50k track for a dual passive/active circuit in a bass.
I suspect I will need to open up a dual 500k pot and rag a single 50k pot for the wafer unless anybody has any brighter ideas or good sources.

iq01221 · Post by **iq01221** » 29 Sep 2011, 19:47

And resistors in parallel to get 50K? It's a single calc, and no opened pots

rocklander · Post by **rocklander** » 29 Sep 2011, 21:49

get a dual gang 500K and just put a 56KR across one pair of terminals?

Prostheta · Post by **Prostheta** » 30 Sep 2011, 04:28

That would alter the taper I'm afraid. I might try it if all else fails.

rocklander · Post by **rocklander** » 30 Sep 2011, 05:02

not sure.. but to be fair, I don't see where you mentioned the taper initially...

Prostheta · Post by **Prostheta** » 30 Sep 2011, 05:58

True. The configuration is a volume and a tone control. Values out by one decade each so passive runs through the 500k and active through the 50k gangs. Capacitor adjusted by one decade also of course.

cpm · Post by **cpm** » 30 Sep 2011, 08:26

you can try to change values in one part of the circuit so both pots are matched
schematic?

Prostheta · Post by **Prostheta** » 30 Sep 2011, 09:35

I don't believe so.

Perhaps sucking the parallel resistor and seeing how it feels in use is a good idea. It might end up being a linear 500k for the "passive" gang and a more logged one for the paralleled "active" gang. I'll do some groundwork.

roseblood11 · Post by **roseblood11** » 30 Sep 2011, 12:45

it's very easy to replace one of the wafer, I've done that a few times without problems

Prostheta · Post by **Prostheta** » 16 Oct 2011, 06:31

Any recommendations on which brands are most friendly for disassembly, ie. CTS, etc? FWIHR on Geofex some shaft mountings are less than perfect to reassemble.

roseblood11 · Post by **roseblood11** » 16 Oct 2011, 09:18

if it's for a pedal, use the 16mm Alphas. Many people have proven that it's quite easy to disassemble them. And if you break them, they're cheap at least...

Prostheta · Post by **Prostheta** » 16 Oct 2011, 12:16

They're actually for an instrument which will be have both passive and active modes but one common control set, hence why I first went straight to the CTS question.