[sdiy] Power supply for Big Briar Etherwave Theremin

Mike Bryant mbryant at futurehorizons.com
Thu Jun 30 20:21:33 CEST 2022


You’d need to check the internal circuit, but you may find a 12 or 18V DC switchmode PSU would do the job.  Really depends on the internals and whether it actually derives anything from the 50/60Hz


From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Didier Leplae via Synth-diy
Sent: 30 June 2022 18:10
To: Synth-diy Mailing List
Subject: Re: [sdiy] Power supply for Big Briar Etherwave Theremin

I would imagine what’s indicated on your power supply must be correct. I also found another image online of a power supply and it had the same pinout. Perhaps the schematic has an error or perhaps there was another version. I should be able to open up the theremin and see if pins 2 and 3 are both connected to ground.

Now, does anyone have a suggestion for building a 14vac 200ma power supply? Or if I could find something with those specs I could put a 5pin din connector on it


On Jun 30, 2022, at 11:33 AM, Ben Stuyts <ben at stuyts.nl<mailto:ben at stuyts.nl>> wrote:
Oh bummer. Let me know if you want me to actually measure it.
Ben


On 30 Jun 2022, at 18:00, Didier Leplae <didierleplae at yahoo.com<mailto:didierleplae at yahoo.com>> wrote:

Interesting because the pinout shown on your power supply is different than indicated in the schematic in the manual on fdiskc. There pin 1 is connected to power and pin 2&3 are connected to ground. I wonder if that means there were different versions?


On Jun 30, 2022, at 10:43 AM, Ben Stuyts <ben at stuyts.nl<mailto:ben at stuyts.nl>> wrote:
Here’s a photo of mine. Funny, the MIDI warning on the label.

The connector on my Etherwave is a 5-pin connector, so the power plug can be either 3-pin or 5-pin.

Ben

<PSU_Etherwave.jpeg>


On 29 Jun 2022, at 22:46, Didier Leplae via Synth-diy <synth-diy at synth-diy.org<mailto:synth-diy at synth-diy.org>> wrote:

I have an opportunity to buy a Big Briar Etherwave Theremin from a friend for cheap. The only problem is it is missing the power supply.
Searching online, I find a lot of Moog Etherwave power supplies.
Does anyone happen to know if these are compatible?
The power plug on the Big Briar unit is a 5-pin midi style plug.
Pictures of the Moog power supply look like 3 pins.
https://www.bigcitymusic.com/products/power-supply-115v-us-for-etherwave-theremin

I’m wondering if they just simply removed two pins and the three fit in the midi style plug.
If not compatible, does anyone know where to get a hold of the Big Briar supply?
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