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ID = 12963
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
  Ca. 1925 up to 1945 rare.
Identical to S23

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Er) Top contact with a cap.
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.

Dimensions (WHD)
incl. pins / tip
50 x 130 x mm / 1.97 x 5.12 x inch
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
S23: Sammlung
Anonymous 557 Collector

S23: rtt
Michael Schlör

S23: Marconi Advertisement
Anonymous 15 Collector

from Just Qvigstad

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 a member from D

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