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Fleming_wood-frame

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ID = 87548
       
Country:
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Tube type:  Signal Diode - one single system   Detector 
Identical to Fleming_wood-frame

Base Wires Sidecontact.
Was used by Radio/TV-reception etc.
Filament Vf 12 Volts / Direct
Description

This tube has a carbon filament and is mounted in a wood frame about 4 inches square. The tube is mounted tip down, with a coiled spring around the bulb, in the tip area. It is understood that this tube preceded tthose with regular brass bases. Reproductions apparently have been made of this tube.

 
Information source -- Collector info (Sammler)   

 
fleming_valve_jg.jpg

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