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Theremini problem

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Theremini problem

Postby bizarre » Sat Mar 25, 2017 7:28 pm

Hello!, my Theremini sounds shaky at low frequencies and even, the passage from some notes to another is longer than normal.

I have calibrated it repeatedly, changed banks and the problem continues.

What I can do?
bizarre
 
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Re: Theremini problem

Postby katiepritchard31 » Wed May 03, 2017 11:34 am

Same problem I am faced with my dad's one!
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Re: Theremini problem

Postby bichuelo » Wed May 03, 2017 9:04 pm

You should contact tech support, that sounds to me like a faulty IC on the pitch antenna board
http://audiotecna.info
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Re: Theremini problem

Postby Lilly » Mon Jul 17, 2017 1:04 pm

I think it is not the pitch board, but insufficient grounding of the instrument.
Also read my post here: https://forum.moogmusic.com/viewtopic.php?f=5&t=28394
The Theremini power supply is special because Gnd (outer contact of DC plug) is connected to the PE (protective earth) contact of the mains plug.
This is not the case with many other power supplies.
I also noted that not all old style transformer power supplies (heavy wall warts) are suited because Theremini is susceptable to ripple on the DC (you hear a humm in the Audio).
Only good quality regulated supplies with Gnd (3-wire mains cord) will work.
Lilly
 
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Re: Theremini problem

Postby gingercat » Sat Nov 10, 2018 4:50 am

Had a similar problem so returned it for a replacement then the new one started diing it. Turned out it was the power supply on my laptop which i was using for the editor. As soon as i switched it off prblem solved.
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