Transformator for Oberheim 4-Voice

Good day

I have had an Oberheim FV1-1, production number 668, for many years.

While playing, everything suddenly stopped. No sound, no light. My guess immediately went towards the power supply. I only have 16.5 volts on the transformer. That’s certainly not enough, I think that the transformer should output at least 24 volts AC so that the subsequent electronics can regulate +/- 18.5 volts DC.

Unfortunately I can’t find a transformer in your spare parts. I could now simply take a ring transformer or and test it with it. But one question still remains unanswered. Does the transformer have to be galvanically isolated?

With kind regards

Werner Scheidegger

Schaffhausen Switzerland