Category Archives: Stories

Lydia Kavina – Original works for theremin

Joshua Pierce, piano Elizabeth Parcells, soprano Portland String Quartet Composers: Bohuslav Martinu, Percy Grainger, Joseph Schillinger, Lydia Kavina, Jorge Antunes, Vladimir Komarov, Friedrich Wilckens, Isodor Achron Lydia Kavina (1967) is the leading thereminist in the world today, according to the booklet. Beeing the granddoughter of Leon Theremin’s first cousin, she was the inventors last protégée. […]

Clara Rockmore – The Art of the theremin

Nadia Reisenberg, piano Composers: Rachmaninoff, Saint Saëns, De Falla, Achron, Wieniawski, Stravinsky, Ravel, Tchaikovsky, Glazunov The Russian borne (1911-1998) Clara Rockmore was the youngest of three musically gifted sisters. Her oldest sister is Nadia Reisenberg who plays the piano on this cd. Clara was gifted with an ‘ absolute pitch ‘ and a great sense […]

The RCA theremin – 2 – The Pitch Control System

The RCA Victor Theremin

The construction and operation of the RCA theremin pitch control circuit. This installment deals with the construction and operation of the RCA theremin pitch control circuit. The heart of the system is a large “pitch control resonant coil” (PCRC). The PCRC is the tall coil mounted the left side seen when looking into the back […]

The RCA Theremin – 1

The RCA Victor Theremin

Part 1 of a technical essay about the RCA theremin by Reid Welch. This is the first of several installments about the RCA theremin. Our goal is to promulgate enough data to enable the skilled amateur to build an RCA equivalent, and to make the circuit less mysterious to the non-technical person. Discussion and corrections […]

More Original RCA Data

The RCA Victor Theremin

RCA theremin technical notes written by Reid Welch. The RCA Pitch Resonant Coil Consists of more than a thousand turns of approximately 38 ga. ( B&S gauge) SSC enameled wire wound on a 12″ tall by a 2 15/16″ diameter, 1/16″-wall phenolic impregnated fiber tube. Winding length- 10 3/4″ DCR 445 ohms Z at 1kHz […]

Dimensions of the RCA Oscillator

The RCA Victor Theremin

Notes about the RCA theremin oscillators by Reid Welch. Both RCA oscillators are identical, two-layer coils wound on a tubular fiber form about 1.5″ diameter by 1 3/4″ long. The wire is single silk covered (“SSC”) enameled wire approximately #30 B & S gauge. Turns per layer- about 75. The winding length is around 1 […]

RCA cabinet dimensions

The RCA Victor Theremin

The RCA Victor Theremin cabinet dimensions as measured by Reid Welch. At 11:07 PM 7/21/97 -0400, Charlie finished his report with: …here are the rca dimensions, as measured on dave weiner’s instrument: >Height from floor to top of cabinet 46.5″ >Height from floor to bottom of cabinet 22″ >Height from bottom of cabinet to top […]

Clara Rockmore Theremin Service Notes

Clara Rockmore's custom Theremin built by Léon Theremin.

– This post made possible by the generosity of Clara Rockmore – This post concerns theremin adjustment instructions written by Bob Moog for Clara at the time he revived Clara’s custom theremin in 1989. My comments are in small text. Thanks to Bob Moog for his hand traced Rockmore schematic seen on Jason’s web pages. […]