MIL-E-1/28 Revision G, December 3, 1970
ELECTRON TUBE, PHOTOMULTIPLIER
Additional Comments: CNCL S/S BY MIL-PRF-1/28
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.