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GU21

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ID = 30520
       
Country:
Great Britain (UK)
Brand: GEC, General Electric Co Ltd., GENALEX; London
Tube type:  Half-Wave Mercury-Vapor Rectifier   Power-supply 
Identical to GU21 = GU20
Similar Tubes
Normally replaceable-slightly different:
  CV5

Base Edison giant, E40 = 40 mm-Goliat Top contact with a cap.
Was used by Industrial
Filament Vf 4 Volts / If 11 Ampere / Direct / Specified voltage AC/DC
Description

Va<13kV; Ik<1.25A mean.
Also manufactured labelled GU20/21 when the characteristics of the types were merged.

 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
60 x 258 x mm / 2.36 x 10.16 x inch
Information source Babani, International Radio Tube Encyclopaedia   p. 278 & 279
- - Manufacturers Literature   
Taschenbuch zum Röhren-Codex 1948/49
Universal Vade-Mecum, Electron Valves and Semiconductor Devices

1_edison_rect_2.png GU21: Manufacturer's Literature
Emilio Ciardiello


Just Qvigstad
gu21a.png
GU21: GEC's catalogue supplement
Anonymous 413 Collector

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Collection of

 
gu21.jpeg

GU21
 

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