RCA Theremin Schematics and Manuals

The power supply and chassis schematic found in the RCA Theremin Service Notes

RCA Theremin Schematic (Modernized version)

Here is a schematic of the RCA Theremin, updated from the Service Notes document with a more modern and clear layout, using the same component numbering system used in Art Harrison's RCA Theremin write up (via archive.org).

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

The power supply and chassis schematic found in the RCA Theremin Service Notes

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 cover

RCA Theremin Service Notes

These service notes have been scanned from an RCA 1929 Redbook, 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.

RCA Theremin Instruction Manual cover

RCA Theremin Instruction Manual

This RCA Theremin instruction manual PDF has been scanned from a well-worn but original 1929 RCA manual. 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.

RCA RCALoudspeaker 106 Service Notes cover

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 cover

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.

RCA Radiotron Manual R-10 cover

(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 cover

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

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