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ID = 13848
Great Britain (UK)
Developer: Métal; France (tubes) 
Tube type:  Triode, vacuum   RF/IF-Stage 
  Ca. 1925 up to 1945 rare.
Identical to BW1304

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.2 Ampere / Direct / Battery =

Babani gives the heater current as 0.1A not 0.2 (Röhren-Codex). Tube used as class A amplifier

Information source L'ABCDaire des lampes de TSF des jeunes années   p. 77
Babani, International Radio Tube Encyclopaedia   p. 54 & 55
Taschenbuch zum Röhren-Codex 1948/49
British Radio Valves - The Classic Years: 1926-1946

b4_base_pins~~560.png BW1304: Fin Stewart
Fin Stewart

Just Qvigstad


Forum contributions about this tube
Threads: 2 | Posts: 2
Hits: 1987     Replies: 0
BW1304 (BW1304)
Peter den Boer

The brand is changed into Common production France because this tube is sold under the Mazda, Metal, Cyrnos and Eta brand.

Hits: 2075     Replies: 0
BW1304 (BW1304)
Peter den Boer

The ETA brand, from 1931 on.
The Electrical Trading Association Ltd
Aldwych House, Aldwych,
London WC2
This company imported Mètal/Mazda (French) tubes but used there own ETA brand, but the type numbering is from Mètal/Mazda. The UNIS FRANCE logo on tubes and boxes proves that they are really made in France.

Datasheet atteched.



End of forum contributions about this tube

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