Antique radios, Old Time Radios
MPT4_7pin
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Country:
Great Britain (UK)
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| Identical to |
MPT4_7pin
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| Similar
Tubes |
Other base:
MPT4
Other base and data slightly different:
MPT4_5pin_Catkin
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Successor Tubes
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MKT4
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| Base |
British-7-Pin, old (M7A)
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / If 1 Ampere / Indirect / Specified voltage AC/DC |
| Information source |
The Saga of Marconi Osram Valve p. 221, 222, 229 & 333
History of the British Radio Valve to 1940 p. 147 & 189
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49
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Just Qvigstad
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MPT4_7pin: Marconi Advertisement
Anonymous 15 Collector
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Collection of
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Variants
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