Strange noise from Etherwave plus

Posted: 9/9/2020 6:27:26 PM

From: 60 Miles North of San Diego, CA

Joined: 10/1/2014

Oh! Now I´v been in touch with Moog. They say it might be a tuning issue, and that I need to open the box of Etherwave and tune with the little red tool.Have anyone done this? And do you have further tips? This is the guide that they sent me:Tuning the Etherwave (10/22/19)[(1) Make sure the instrument is on a mic stand or on a wooden stool (the instrument is heavily infulenced by its surrounding)(2) Center the Pitch and Volume controls to 12 o'clock(3) Adjust L11 with the trimmer tool until you have your prefered volume range    - The instrument should be silent with your hand close to the antenna and at full volume with your hand away from the antenna(4) Adjust L5 to set the high end of the instrument    - Keep your hand about an inch away from the pitch antenna and adjust for the high freq(5) Adjust L6 to set the range        - The pitch should be silent when you are arms length away from the instrument(6) Go back and forth between L5 and L6 unitl you have your desired range.(7) Screw the lid back on and Enjoy! (the calibration will be slightly off, but adjust the front panel Volume and Pitch controls to desired position)

From my understanding of the theremin the above is all wrong. They must not have listened to your sound byte and gave a generic answer. Even the answer for tuning an EWS is wrong in my opinion, do not touch L5 near the Pitch Antenna. I still go with my first idea that a mechanical issue is happening. Can you get this to happen by bumping the theremin or tapping on the wood box?  A theremin will work without earth ground, just poorly. Disconnect from earth ground and see if you can get that sound to happen.


Posted: 9/9/2020 6:49:16 PM

From: Russia, Saint-Petersburg

Joined: 6/6/2016

The simpler the problem is, the more difficult it is to solve it. It sounds strange at first glance, but the moment we turn on the theremin we hear something similar. In this case, a red screwdriver will not help.
This is most likely due to the bounce of the contacts of the power circuit or the malfunction of its elements, including the cold soldering of the contacts.
Try to insert the power connector into the theremin and wiggle it slightly. What will happen to the sound?

Posted: 9/10/2020 1:47:29 AM

From: Northern NJ, USA

Joined: 2/17/2012

IMO, the EW is just too complicated for most folks to own.

Posted: 9/11/2020 10:52:27 AM

Joined: 9/8/2020

When I wiggle the power connector the pitch slightly alters.
The strange sound discribed above happens both when I play the instrument but also when I step back for a pause while the theremin is still on, so it doesn’t seem to have anything to do with me working inside the field.
So annoying! I gotta send it back for a check. I’ve got so addicted to this wonderful instrument it kinda hurts to be separated for a while!

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