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220B

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ID = 15325
       
Country:
Europe
Brand: Common type Europe tube/semicond.
Tube type:  Double Triode   Power/Output 
Identical to 220B = B22_Clarion
Similar Tubes
Normally replaceable-slightly different:
  4008B ; B220_Hivac
First Source (s)
Aug.1933 : Wireless World (The), London (WW, 79)
Successor Tubes CV1032  
Base British-7-Pin, old (M7A) (Codex=No)
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.2 Ampere / Half indirect
Description

Class B. Six-Sixty introduced this tube in August 1933.

 
Information source History of the British Radio Valve to 1940   p. 145 & 167
Babani, International Radio Tube Encyclopaedia   p. 28 & 29
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
518.png 220B: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		220b_data.png
220B: COSSOR VALVE MANUAL 1935-6
Jose Casas-Avalos
Usage in Models 4= 1933 ; 2= 1934 ; 2= 1935? ; 1= 1935 ; 1= 1936 ; 1= 1937? ; 2= 1937
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):13

Collection of

John Koster (NL)
 
220b.png

220B
 
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