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11A2

Information - Help 
ID = 13389
       
Country:
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Double Diode-Triode   Audio Frequency 
Identical to 11A2

Base British-7-Pin, old (M7A) (Codex=Nb) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Indirect / Battery =
Description

Marketed under the Micromesh brand.

Va <200; Ia 3mA for Vg=-2; gm=2.8mA/V, Ra=18k.

 
Information source Babani, International Radio Tube Encyclopaedia   p. 18 & 19
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 292, p. 656
Taschenbuch zum Röhren-Codex 1948/49

154.png 11A2: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
Usage in Models 4= 1933 ; 1= 1934

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):5
 

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