Dual Concentric Pots

[Carlosraj]

Hi
I am looking for 50KB Dual Concentric Linear pots and 1M Audio pots for my old 1988 Peavey KB300 amps. I have contact Peavey but they do not have. Does anyone has or know where to get them?. Please assist. Refer to attachments.

Thanks
Carlos

 

[JonSnell Electronic]

They normally clean up with switch cleaner and then contact grease.
Otherwise, I have used this place before with good results; Great deals from Papa D's Music Store in potentiometers- | eBay Shops

 

[JMFahey]

Great suggestion above 🙂

Once somewhat common because of their use in car radio/cassette players because of the VERY limited panel space, they have now virtually disappeared.

Try getting a NOS one or cleaning as suggested; if not, and pot size is same as simple/double modern ones, you might do some surgery, pull a track from a modern one and mount it in the old one.

Those *look* like 25/26mm ones which are readily available.

Put it back to back against any old pot you have laying around , maybe even other pots in that same Peavey amp, if case diameter matches then wafers "should".

 

[Carlosraj]

They normally clean up with switch cleaner and then contact grease.
Otherwise, I have used this place before with good results; Great deals from Papa D's Music Store in potentiometers- | eBay Shops

I have opened up the pots and realised that the carbon wafers have cracked. The ones at Papa D''s music are 25k pots, the 50k pots are Audio not Linear. Can these 50k linear pots be replaced by 25k linear.


Thanks

 

[Gerrit Boers]

Bourns still has dual concentric pots: https://www.bourns.com/docs/product-datasheets/PTH90.pdf
Values range from 1k to 1M, several tapers are available.
There are several types available, see the Bourns Pro Audio page for an overview.