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220VS

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ID = 12428
       
Country:
Great Britain (UK)
Brand: Cossor, A.C.; London
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
Identical to 220VS
First Source (s)
1933 : History of the British Radio Valve to 1940 p.145 & 193
22.Nov.1935 : Wireless World (The), London (WW, 79)

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Er) Top contact screw type.
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.2 Ampere / Direct / Battery =
Description

This is a variable mu tube.

 
Information source Babani, International Radio Tube Encyclopaedia   p. 30 & 31
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 177, p. 306
Taschenbuch zum Röhren-Codex 1948/49

3_19.png 220VS: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
220vs_data.png
220VS: COSSOR VALVE MANUAL 1935-6
Jose Casas-Avalos

Usage in Models 7= 1933 ; 4= 1934 ; 3= 1935?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):14

Collection of

 
cossor_220vs.jpg

220VS
 

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