[sdiy] Mitxela combined knob & socket

[Mike Bryant]

The mechanical-only solution he mentions at the end did appear in the 60s.  I can't remember if it was for the BBC or EMI, but AB Electronics in South Wales made a combined 1/4" jack with a switched resistor network using a large knob around the jack socket.  It was used for setting the input stage gain of amplifiers on audio mixers.
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From: Synth-diy <synth-diy-bounces at synth-diy.org> on behalf of Ben Stuyts via Synth-diy <synth-diy at synth-diy.org>
Sent: 09 June 2025 01:44
To: SDIY List <synth-diy at synth-diy.org>
Subject: [sdiy] Mitxela combined knob & socket

This is just great: https://youtu.be/dLw2QQdOLaM

I’m not sure how useful it would be in practice, or how wel it would stand the test of time. (As he says so himself.) But I’m very impressed by the concept. One of those things that seems obvious once you’ve seen it, but being the first to come up with this is extremely impressive to me. Or has anything like this been done before?

More info here: https://mitxela.com/projects/euroknob

Ben


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