Tung-Sol 708A SHF Receiving Triode

“Flying saucer tube”.
Introduced by Western Electric in 1941. Prototypes were D-160127 and D-160206.
Classified as secret during the war.

Silver-plated steel case with a glass evacuation tip on the top.
The case is the grid terminal; the filament is brought out through two pins, each forming a coaxial line. The plate is brought out in the same manner.

Radiation-cooled triode used as a converter or RF amplifier at centimeter wavelenghts, and as a mixer in the Navy ASC and ASC-1 aircraft radars to develop a 60-MHz IF. Also used in the 1942 SE shipboard system.
There was apparently an oscillmor version of the 708A numbered D-160573 and 1301M.

Fiche technique • Data sheet • Datenblatt: 708A_WE.pdf & 708A_MIL.pdf

 

Hauteur • Height • Höhe : 61 mm • 2" 3/8
Diamètre • Diameter • Durchmesser : 48 mm • 1" 7/8

 

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