[sdiy] another year, another day, another transformer request

[Mike Bryant]

First thought is do the 17V and 9V need to be isolated from each other ?   You might be able to use a 9-0-9V transformer to get the 17V (as 18V) and a large capacitor(s) to level shift the 0V line and one of the 9Vs to create 9v.
________________________________
From: Synth-diy <synth-diy-bounces at synth-diy.org> on behalf of Todd Sines via Synth-diy <synth-diy at synth-diy.org>
Sent: 06 February 2024 19:27
To: AH <analogue at hyperreal.org>; synth-diy at synth-diy.org <synth-diy at synth-diy.org>
Subject: [sdiy] another year, another day, another transformer request

It's official, my 117/120V transformer has sh!t the bed in my 120V CMU-800R.

Last post was from last year, also on SDIY
https://synth-diy.org/pipermail/synth-diy/2023-February/131184.html

No doubt, I *would* like to buy a few torroidal transformers from Florian, but then I'll want the VCM, module and the SQ-3P module, and it will rise up to several hundred € before I'm done.

In the meantime, I'm looking for a dual tap transformer -- AC120V in, 17V and 9V out. I don't see any of these on Syntaur, Sam.

Leaning towards this Hammond torroidal transformer:
https://www.hammfg.com/electronics/transformers/power/1182

Specifically,
https://www.hammfg.com/part/1182Q9

Are there by chance some cheaper, faster, or even Amazon equivalents?

PS. The reason for the CMU:  With a Beatnic.jp CMU800-MIDI converter, it can also function as a MIDI/DIN Sync converter, plus 8-channel MIDI-CV converter, a pile of chip-tune style square wave oscs, a low-rent 606 drum module, and I've tapped the supplies to drive my System 100M off it to boot. And I have two -- 1 220V, 1 120V.

Todd
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20240206/bce9db54/attachment.htm>