logo by Brian Pfeifer      
neurolifesuit@gmail.com

  


This webpage is about recapturing what the original classic theremin sound was all about

Parts are $100 for a pitch/volume NPN transistor theremin with results better than all of the vacuum tube designs.

Phoenix Features:

Perfect Pitch Field linearity up to 7 octaves of any width.
The Classic Old School Theremin Sound, not a cheap whistle.
Pitch Null
Volume Null
Mic to Line level Output adjust
Instead of Tone, I call it a Texture knob for a mellow sine wave - vocal - excited violin.
On board Pitch Preview amp with Volume control
You can get that walking bass effect by tapping the loop to snap the sound back on.

* This will fit inside an EWS box, purchase one cheap that does not work. *

Mouser Parts List

The Vactrol VTL5C1 used in my PWM volume control has available sources
Vactrols with a higher last number will not work, too slow.

Amazon:
Link - 12 volt AC transformer with ground prong, ideal for this project.
        
You need a good earth ground, 12 volts AC, DC or Switching Supply will work
Link - Potentiometer trimmer assortment, ideal for this project
4 x 10K
Link - β Antenna C-253 spring/coil for an ideal linear pitch field
(a modern day discovery)
Link - Plastic Sleeve to keep circulating air off pitch antenna.
Link - 3/8" x 3' wood dowel to support β Antenna spring/coil
(get at local hardware store)

Schematic it could be re-drawn, some corrections on sheet below

Schematic corrections to the drawing of the audio section above.

Schematic will need update, are you game?

Printer Toner PDF's to make the two pitch & volume circuit boards, will arrive here soon.

* This is not a Beginner Electronic Build Project *

 

Post your interest in my Chat Forum maybe others can eventually help one another.

12.14.18 Last update

2020 Theremin webpage is under development.