I’ve been working on this for the last few weeks. Yes, those are replica RCA oscillator coils. I’ll post more info later, but for now Ill just say that it is a FET-based RCA circuit and I’m ” very pleased” with how its sounds. ; )
Mark Keppinger’s Vacuum Tube Theremins-
(Pictured above) All Five Coils -a complete set.
For both of Mark’s designs- the original (MK1) as well the new miniature tube version- the ‘Model K’. Each coil is hand wound on a phenolic tube form, to the exact specifications listed in Jeff Spark’s verified schematic and parts list (from thereminworld.com) The set includes brass hardware (size 4-40) terminal connections and are completely ready to wire up and install.
- Still only $200!
Questions, comments, want to place an order? Contact me here.
Q: “Hey charlie, I’d like to build a theremin. Where
do you get those gorgeous gigantic coils?”
A: ” I make them.”
Probably the most intimidating part of building a vacuum tube theremin (or Tesla coil) is the prospect of making large custom inductor coils. Just the thought of winding gossamer-thin magnet wire thousands of turns by hand is enough to scare away most amateur builders. While winding large coils isn’t necessarily difficult, making the end result look so pretty is.
For over five years (sheesh, already?!) I’ve been hand-winding large inductors for other builders and enthusiasts. Theremins, Tesla coils, or otherwise – if you can get me the specifications ( diameter, wire gauge, and # of turns) I can wind it.
Need some coils? Have some questions? please contact me.