Building The Beast

Based on the original Etherwave. It has the original circuits for distorting the output

but a different mixer (unproven) with premix distortion and coupling (unproven). There's

also an attempt at FM using a LFO on the pitch adjust pot.

I also added Fred's distortion circuit to create some harmonics for the 8 band musical EQ

with resonance to work on. There are two comb outputs for possible stereo applications. A

THAT 2180 VCA is incorporated to allow clean volume control.

I'm waiting for some beefier transistors to show up then I will begin building this beast!

Hmm I don't know how to get the pictures to show up larger...

Bob, simply insert the proper URL of your picture (the native resolution files have the original names, the thumbnail files have  suffixes "_sm")

Awesome! Keep us posted on your progress Bob!

I made this box for the Beast;

From this Treasure box I got for $5 at a yard sale;

I was going to comment on the metal box within the wooden one as a capacitance adder, but for an analog Theremin it's probably fine as absolute sensitivity isn't a primary concern.  But the most sensitive part of any Theremin is exposed at the antennas, so I wonder how much shielding actually helps with interference and such?  Best I think to have a large voltage swing at the antennas and thus swamp environmental interferers.  Moog's earlier physical designs were likely strongly influenced by radio construction standards at the time (metal chassis, tubes & controls mounted on it, etc.) rather than best practices for solid state Theremin construction.  That said, having the audio circuits shielded can't hurt.  I wish you luck with this project!

Hmm somehow I thought the al box would help with external noise.

We have a strong FM station nearby that messes with my SW radio.

I'm thinking I like the MK2 better for a big project Theremin. I'll make

the EW in Stock form and do something like this;

Here's an add on Stereo Chorus. I had purchased these PT2399's with an order as they looked cool now I have a place to use them!