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R2

Information - Help 
ID = 8080
       
Country:
Great Britain (UK)
Brand:
Developer: Standard Telephones and Cables Ltd. (STC); London, Foots Cray 
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
Identical to R2 = 43IU = R42_Ferranti
Similar Tubes
Normally replaceable-slightly different:
  A11D ; IW3 ; IW4 ; IW4/350
Different maximum ratings:
  R3
First Source (s)
22.Nov.1935 : Wireless World (The), London (WW, 79)
Successor Tubes 1934   R3   A11D  
Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Em)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 2.5 Ampere / Half indirect
Description

The R3 superceded the R2 as the R3 has a 500V capability. 120mA max current (Brimar Data Book 1947-48). Also branded Micromesh, an STC subsidiary.

 
Information source History of the British Radio Valve to 1940   p. 142 & 176
Babani, International Radio Tube Encyclopaedia   p. 284 & 285
Taschenbuch zum Röhren-Codex 1948/49
British Radio Valves - The Classic Years: 1926-1946
150_8.png R2: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
Just Qvigstad 		r2_r3_brimar_no.4_p165.png
R2: Brimar Radio Valves and Teletube Manual No.4
Adrian Riesen
More ...
Usage in Models 1= 1930?? ; 2= 1932 ; 6= 1933 ; 1= 1934? ; 7= 1934 ; 6= 1935 ; 4= 1936? ; 7= 1936 ; 1= 1937? ; 15= 1937 ; 10= 1938 ; 1= 1939? ; 3= 1939 ; 5= 1940 ; 2= 1946
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):71

Collection of

Jose Antonio Gonzalez-Ruiz (E)
Karlheinz Fischer (D)
Heinz Schmidt (D)
Domingo Iglesias-Carbajales (E)
 
r2_1_resize.jpg

R2
 

Variants

Röhre von STC mit schräg angeordnetem System
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