Accession Number:

AD0779479

Title:

Development of a Versatile Linear Gridded-Tube/Cavity UHF Power Amplifier

Descriptive Note:

Semi-annual rept. 1 Oct 1973-1 Apr 1974

Corporate Author:

VARIAN ASSOCIATES INC SAN CARLOS CA EIMAC DIV

Personal Author(s):

Report Date:

1974-04-15

Pagination or Media Count:

26.0

Abstract:

Five EIMAC type 8938 or modifications thereof were fabricated and tested over the frequency range 225 to 400 MHz. Tube modifications included a application of a special high temperature prograde grid coating, b application of high conductivity materials to critical parts of the tube configuration in order to reduce RF losses and provide improved thermal management, c the application of a coated particle cathode emitter material. Two different tunable cavities were fabricated during this period. The first, a narrow band cavity, was built in order to evaluate comparative performance of tubes 8938 and the modifications applied to those tubes. The other tunable cavity is a double-tuned iris coupled configuration and is the prototype wide band cavity for this program.

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE