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