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708A

Information - Help 
ID = 33924
       
Country:
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Developer: Western Electric Company Inc.; New York (NY) 
Tube type:  Triode, vacuum   UHF 
Identical to 708A = CV3590
First year 1941 -- Original-techn. papers.
Predecessor Tubes D-160127   D-160206  

Base SPECIAL TUBEBASE in general
Was used by Radar
Filament Vf 1.7 Volts / If 1.85 Ampere / Direct
Description

UHF grounded grid mixer triode for radar receivers. Flanged steel body with grid connected; three coaxial feed-through pins for filament and anode from the bottom plate. Top glass vacuum seal. Mu 10, f max 3GHz. Used in early 1-3GHz radar sets. Also made by TungSol

Introduced by WE in 1941; source: Waveguide Transmission by George C.Southwoth, Bell Labs Series, chapter IX.

The use of a vacuum triode as mixer in 10-cm radar receivers was preferred before the availability of TR cells, due to the intrinsic protection against burnouts during the magnetron pulses.

 
Literature Tube Lore (I)   
 
westernelectric708a.jpg
708A: USA
John Albion

 


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