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ID = 12963
Great Britain (UK)
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
  Ca. 1925 up to 1945 rare.
Identical to S23
First Source (s)
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 0.1 Ampere / Direct / Battery =

Va <150 Vs<70 Gm=1.1mA/V with max volts and Ia=1.3 with -Vg=1.5. Economy screen grid battery tube of medium conductance for high frequency amplification and detection. Amplification factor 275. Also made in Italy by Officine Marconi Genoa. Early versions of the tube available with screw or metal top cap and later a metal cap.

Dimensions (WHD)
incl. pins / tip
50 x 130 x mm / 1.97 x 5.12 x inch
Information source History of the British Radio Valve to 1940   p. 148 & 184
- - Manufacturers Literature   
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49

s23_so.png S23: rtt
Anonymous 10 Collector

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Just Qvigstad
S23: Marconi Advertisement
Anonymous 15 Collector

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Usage in Models 1= 1932 ; 3= 1933 ; 12= 1934 ; 1= 1936? ; 2= 1937

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):19

Collection of

Collection of a member from D


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