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