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Old 23rd September 2012, 07:12 PM   #1
dgta is offline dgta  United States
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Default Chassis mount trimpots?

Need a source for old-fashioned trimpots for chassis/panel mounting. The type you find in old tube equipment. Either the shaft & locking collar type of the shaftless (screwdriver slot) type. Anyone have a source? I need 5k value but I can probably use anything from 2k to 10k.

Any suggestions? Thanks
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Old 23rd September 2012, 07:48 PM   #2
DF96 is offline DF96  England
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I used these for bias pots. Short 1/4 inch shaft with a screwdriver slot in the end. They were not quite what I was looking for, but the nearest I could find from the usual DIY suppliers in the UK.
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Old 23rd September 2012, 08:01 PM   #3
dgta is offline dgta  United States
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Thanks. Those are not locking collar type. Non-locking is ok in a shaftless, but if they have a shaft, it's too easy to disturb accidentally.
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Old 23rd September 2012, 08:13 PM   #4
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Try Surplus Sales of Nebraska, or Electronics Surplus in Mentor OH -- they both have the slotted screwdriver adjust pots with locking collar -- at least last time I looked.
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Old 23rd September 2012, 08:16 PM   #5
DF96 is offline DF96  England
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Mine are mounted between EL34s in a position where they are unlikely to be disturbed, and the shaft seems to have quite a bit of friction so I have not had any problems with unwanted changes.
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Old 23rd September 2012, 09:22 PM   #6
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Are these what you're looking for -- with the 1/4" shaft -- there are others with a 1/8" shaft as well:

Click the image to open in full size.
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Old 24th September 2012, 04:23 AM   #7
dgta is offline dgta  United States
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Thank you Jack!

Yes, that's what I'm looking for. I prefer the two at the right side of the picture with no shaft, as they would be exact replacements in an existing chassis. With the mounting holes 1" apart. Those also have the advantage that they can be operated from both sides, very handy when working on it.

I think I found some at Electronic Surplus, I've got to check with them tomorrow. Their picture is not clear.

Thanks for the help.
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Old 24th September 2012, 04:55 AM   #8
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