Crate CR100-EV Potentiometer

[01redcobra]

A friend asked me to fix up his Crate amp. Both of the dual control 100k pots have broken inner shafts. I have searched high and low for a suitable replacement and found nothing. I've attached photos of them. Any ideas from anyone? They are circuit board mounted. Thanks in advance.

[52 Bill]

A friend asked me to fix up his Crate amp. Both of the dual control 100k pots have broken inner shafts. I have searched high and low for a suitable replacement and found nothing. I've attached photos of them. Any ideas from anyone? They are circuit board mounted. Thanks in advance. [ATTACH=CONFIG]21123[/ATTACH][ATTACH=CONFIG]21124[/ATTACH]

They appear to be CTS pots. If there are no other alternatives, I would find another CTS made concentric pot and swap the shafts. Fender Jazz Bass concentric pots should fit the bill.

[Jazz P Bass]

Have you tried contacting Loud technologies?

[nickb]

Any markings on it? Manufacturer, part number, value & taper? Note and search.
Measure the critical dimensions: body side, shaft center to start of pins, pin spacing etc
Looks similar to this (10k example) : RK163 Series - Basic information

[01redcobra]

Numbers on the pot are 70-104-05 and R1378115. I did contact Loud and they said they were no longer available. I've considered the Jazz bass pots and I'm thinking this will be my only alternative. Do you think these would work? Fender Concentric Vintage Jazz Bass pot 0019268000

[Enzo]

Those fender pots are concentric shafts. Your pot is just a simple shaft with stacked pot elements, right? You don't adjust the two sections of it independently.

AES has a number of dual 100k pots, one of which ought to be adaptable. I see both linear and audio tapers.

Antique Electronic Supply LLC

And Mouser has some too. Search "100k pot" then when you get to actual pots, select "dual" and the 100k value, and a few choices come up.

[52 Bill]

Numbers on the pot are 70-104-05 and R1378115. I did contact Loud and they said they were no longer available. I've considered the Jazz bass pots and I'm thinking this will be my only alternative. Do you think these would work? Fender Concentric Vintage Jazz Bass pot 0019268000

Yes, the shafts should fit the old pots. The only thing I'm not sure about is whether the knobs will fit the new shafts.

Enzo, these are concentric controls with dual knobs. The inner shafts have been broken off.

[Enzo]

Oh, sorry.

[Enzo]

My files skip from CR65 to CR110.

[01redcobra]

Yes, like 52 Bill said, they are concentric, with an inner and outer shaft to allow for separate adjustment. I removed the one pot and took it apart and the carbon band looks like it's in good condition. Now hopefully I can just replace the wiper boards in both sections and be good to go. Thanks to all for the help.

[01redcobra]

Enzo, I've attached a copy of the CR100-EV schematic for you. Thanks again to all of you for being so helpful.CR100EV_OM.pdf

[nickb]

Not very helpful numbers I was looking resistance and taper. I'll guess at 100K log (A taper).

Did you take a look at the dwgs in the link I sent? Have you got a ruler out and measured your old one yet? Armed with the dimensions you can look on Mouser and/or Digikey or approach one of the many resellers and check they have the parts that fits.

[Enzo]

Thanks for the file.


Looks like standard 24mm size from here. Of course that didn;t work out a few posts ago, so...

[olddawg]

Seems to me any concentric pot of the right value and taper that the knobs will fit on should work. You might have to rotate it 90 degrees and connect it to the board with wires. I've done this before. Mounted the pot on the front panel with jumpers to the board. Sometimes you have to make the mounting hole larger if its a freaky weird pot.