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ID = 13065
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Tube type:  Thyratron 
Identical to T21
First Source (s)
Aug.1937 : Wireless World (The), London (WW, 79) Advertisement

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=K)
Was used by Industrial
Filament Vf 4 Volts / If 1.2 Ampere / Indirect

Designed as a time base generator for use with magnetic deflection tubes.

It is a three electrode thyratron with a top cap for the anode.

Pin 1 - not used

Pin 2 - control grid

Pin 3 - heater

Pin 4- heater

Pin 5 - cathode

Top csp - anode

Information source British Radio Valves - The Classic Years: 1926-1946   Supplement, p. 155
- - Manufacturers Literature   1937
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49

t21_sock.png T21: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

Just Qvigstad
Christian Schaufelberger

More ...
Usage in Models 3= 1937

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):3

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