Antique radios, Old Time Radios
E993
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Country:
Great Britain (UK)
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| Identical to |
E993
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| Similar
Tubes |
Multiple differences or of other kind:
W30
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| Base |
British-7-Pin, old (M7A)
Top contact with a cap.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 13 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC |
| Description |
Experimental "W30/catkin in glass (replacement)" Developed at the Hirst Research Centre of GEC.
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| Information source |
The Saga of Marconi Osram Valve p340
-- Collector info (Sammler)
Babani, International Radio Tube Encyclopaedia
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
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Just Qvigstad
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