[sdiy] Converting rack mount to DC input?

[Mattias Rickardsson]

Den lör 4 juli 2026 14:23Florian Anwander via Synth-diy <
synth-diy at synth-diy.org> skrev:

> Maybe, it's a stupid thought, but...: could it be that a device relies on
> beeing galvanical separated from other devices. I this case the common
> supply might clash with the devices concept.
>

This reminds me of a somewhat similar issue I had many years ago:

I wanted a Korg MS-20 and a Korg KR-55 to share one external power puck.
(Swedish-sold old Korgs had a big external power transformer to step down
from 220 V AC to 16 V AC, which is then what the instrument then accepts
via a plug with 2 flat prongs that doesn't seem roadworthy with European
electrical standards.)

So I made a short splitter Y cable on the 16 V AC side and attached both
instruments and turned them on. But then I connected an audio cable between
them (or audio cables from both units to the same mixer) and I had a blown
fuse! It was apparently not okay to connect those two grounds together when
running off the same AC supply.

/mr

>
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