MIL-E-1/390 Revision D, November 8, 1971
ELECTRON TUBE, CATHODE RAY TYPES 3RP1 AND 3RP1A
Includes all amendments and changes through Validation Notice 1, June 1, 1989
Additional Comments: CNCL S/S BY MIL-PRF-1/390
The complete requirements for procuring the electron tube described herein shall consist of this document and the latest issue of Specification MIL-E-1.
This specification is mandatory for use by all Departments and Agencies of the Department of Defense.