RCA Theremin Schematic (Modernized version)

Here is a schematic of the RCA Theremin, updated from the RCA Theremin Service Notes with a more modern and clear layout, using the same component numbering system used in Art Harrison's RCA Theremin technical overview.

A bill of materials with this numbering system can be found here: RCA Theremin Bill of Materials

RCA Theremin Schematic (Original version)

Here is a high resolution composite of the power supply and chassis schematic found in the RCA Theremin Service Notes, with the vacuum tube numbering error fixed.

RCA Theremin Service Notes

These service notes have been scanned from an original, gifted to us by Peter Pringle, and the errors have been corrected. This document is provided to improve upon the documents that currently exist online.

An html version of the service notes is also available.

High quality, professionally printed replicas of the RCA Theremin Service Notes, as well as other replicas of vintage RCA Theremin documents can be purchased from our friends at Forgotten Futures.

RCA Theremin Instruction Manual

This RCA Theremin instruction manual PDF has been scanned from an original, gifted to us by Floyd Engels. The pages were digitally cleaned and restored. This document is provided to improve upon the documents that currently exist online.

An html version of the instruction manual is also available.

High quality, professionally printed replicas of the RCA Theremin Instruction Manual, as well as other replicas of vintage RCA Theremin documents can be purchased from our friends at Forgotten Futures.

RCA Loudspeaker 106 Service Notes

These service notes have been scanned from an RCA 1928 Redbook. This document is provided to improve upon the documents that currently exist online.

An html version of the RCA Loudspeaker 106 service notes is also available.

RCA Theremin Replacement Parts

This fascinating document comes from the Smithsonian’s RCA Theremin collection. We are unaware of any other surviving document and would greatly appreciate any leads on acquiring a higher resolution copy.

(Selections from the) RCA Radiotron Manual R-10

This document collects information about the five different vacuum tubes found in the RCA Theremin: UX-280, UY-224-A, UY-227, UX-171-A, and UX-120, and also includes the UX-199 and RCA-56, which can be substituted for the UX-120 and UY-227, respectively.

Hickock Obsolete Tube Types Model 539B-539C Tube Testers

Chart for obsolete tube types for Hickock tube tester models 539B and 539C.