Antique radios, Old Time Radios
MHD4
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Country:
Great Britain (UK)
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| Identical to |
MHD4
= ACDDT
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| Similar
Tubes |
Other base:
DL63
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Successor Tubes
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DL63
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| Base |
British-7-Pin, old (M7A) (Codex=Nb)
Top contact with a cap.
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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. 142 & 342
History of the British Radio Valve to 1940 p. 141 & 179
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49
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MHD4: Gecovalve technical bull. june 1933
Xavier Lemercinier
More ...
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MHD4: Telefunken Werkstattbuch
Wolfgang Bauer
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Just Qvigstad
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MHD4: Marconi Advertisement
Anonymous 15 Collector
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):97
Collection of
Collection of a member from D Collection of a member from D |
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