[sdiy] Retractable mini pots

[cheater cheater]

On top of Tom's idea (pretty good idea if all you want to do is to
tune the thing and forget) I could go in the completely opposite
direction - I think having the temperament knobs on the front panel is
an interesting concept, and I would have performance controls right
there on the front panel that would allow tuning with +/- 1 semitone
on long linear faders, in order to allow changing the tuning during
performance. I think this could be an absolutely amazing capability in
the right hands. I would also add 2 more voices to let people have a
key tuned to the blue note and whatever else they might want. And a
keyboard with 14 keys per octave. But now we're strictly departing
PS3100 clone territory and are going straight into Weird Shit
territory.

On Sat, Aug 22, 2026 at 1:19 PM Tom Wiltshire <tom at electricdruid.net> wrote:
>
> Personally I'd avoid the hassle and look for a nice panel mount trimmer. A row of 12 flathead screwdriver adjustments will be fairly flush, can't get turned accidentally, and will let you tweak the temperament without opening the case.
>
> This type of thing:
>
> https://www.rs-online.id/p/43p-side-adj-mount-cermet-trimmer10k/
>
> HTH
>
> On 21 Aug 2026, at 19:28, Dixon, David via Synth-diy <synth-diy at synth-diy.org> wrote:
>
> Hello Synth DIY Team,
>
> As many of you probably know, I am building my own version of the Korg PS-3100.  (Here’s a fairly cringe video of the core in action, with a lot of extra info about the board layouts, etc — https://www.youtube.com/watch?v=lbtxMdQE64A) I’ve got the core circuitry (48 separate synthesizers) and much of the downstream circuitry (resonators, etc) designed, built and tested, and I am currently trying to lay out the panel.
>
> I am going to also have the 12 mini pots down the left side for “TEMPERAMENT ADJUST” (which I presume was basically a way to adjust the tuning without opening the case and adjusting trimmers).  The original had these nifty retractable mini pots that can be pushed in flush the panel when not being used.  I cannot seem to find anything similar on the internet.  I was wondering if any of you had any inside track into where one might be able to procure such a thing.  I need a dozen of them, and I’d prefer if they were PCB mount, but that’s not strictly necessary.
>
> Thanks in advance,
> Dave Dixon
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