Life Tests on Type 864 Triodes
Abstract
A quantity or vacuum tubes, Type 38064 triodes, of various manufacture, comprising twelve groups consisting of a total of ninety tubes, were obtained for life tests and use in the first oscillator circuit of the Model RAB radio receiver to determine their electrical performance. After static and dynamic characteristics were taken, sixty-six were selected and placed in life test circuits, with their emission, transconductance, and oscillator operation noted every 50 hours during a 1,000 hour life test. It is recommended that the Type 38064 triode which at present is used in the first oscillator circuit of the llodal RAB radio receiver be reproduced with a tube which will give better electrical performance and much longer life. It is preferable that the substituted tube be of the uni-potential cathode type and of equivalent electrical characteristics. As in suggestion, the Type 38056 triode may be found suitable for such use in the subject receiver, with slight circuit modifications.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 09, 1935
- Accession Number
- AD1149655
Entities
People
- C. H. Williams
- J. T. Fetsch
Organizations
- United States Naval Research Laboratory