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VT205_GPO

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ID = 64901
       
Country:
Great Britain (UK)
Brand: Common type Great Britain tube/semicond.
Tube type:  Transmitting Tube, Pentode, air cooled   Text 
  Ca. 1925 up to 1945 very rare. ***
Identical to VT205_GPO = VT506 = 10E/457 = CV1630
Similar Tubes
Normally replaceable-slightly different:
  5C/450A ; CV1506 ; ESP450
Base SPECIAL TUBEBASE in general 2 Top contacts.
Was used by Telephony
Filament Vf 10 Volts / If 13 Ampere / Direct / Specified voltage AC/DC
Description

Transmitting tube with thoriated tungsten filamentary cathode. 450W plate dissipation, 3KV max anode voltage.

Designed for Supressor Grid modulation - the second top cap is G3.

Superceded by the CV1506.

 
Information source Taschenbuch zum Röhren-Codex 1948/49   
-- Original-techn. papers.   
vt506_2~~1.png VT205_GPO: Manufacturer's Literature
Emilio Ciardiello
 
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