No volume control and two tones

Posted: 1/3/2020 12:02:11 AM

Joined: 1/2/2020

I'm having difficulty with a used Etherwave Plus theremin.  

For starters the volume loop does not control the volume.  There is a constant hum.  Touching the loop changes the note.  Volume is at a constant no matter the position of the left hand.

Also, no matter how I tune I can't get the theremin to stop producing this very high pitch.  It's almost as if it is doubling itself.

Thoughts or things to try would be appreciated! Thanks in advance

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