Maestro Rhythm Jester (RJ-1)

I have a Maestro Rhythm Jester (RJ-1) drum machine, which I bought years ago from Canada (I think).
It has Canadian power input (117v, 50/60 Hz). Says 3W on the back.
I’m in the UK, and want to convert to 230v/50Hz. Unfortunately, I have NO other info on this machine.
The Canadian transformer has two black wires going into the primary, and two blue ones coming out of the secondary. The code on the transformer says KS-T-0013. Anyone have any idea what sort of replacement transformer I need? Or how to analyse the existing one?
All help gratefully received..

Right Now on eBay 


  1. Update: Managed to locate a cheap step-down transformer to test it with. I’ll then be able to measure the transformer output voltage and source a replacement transformer. (or wire-in the step-down transformer..)

  2. As you can probably tell, this project stalled. The machine was dead when I tried to power it up, and I’ve now mislaid the transformer. Enthusiasm level is “low”.

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