Radio Antica e Radio d'epoca
77_G&R
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Stato:
Australia
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| Identico a |
77_G&R
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| Prime
informazioni |
02.Nov.1923 : -- Original-techn. papers.
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| Zoccolo |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Utilizzata per |
Radio/TV-reception etc. |
| Filamento |
Direct / Battery = |
| Descrizione |
This was invented and patented in Australia on November 2,1923. The basis of the patent was that all four "leading-in" wires, from the base were terminated in metal tubes sealed into the "press". The opposite ends of the tubes held the filament, anode and grid wires respectively and these were made of sturdy wire. The object of the patent was to have a rigid element assembly inside the finished tubewere
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Dimensioni
(LxAxP)
incl.pins/tip |
x 120 x 25 mm / x 4.72 x 0.98 inch |
| Peso |
44 g / 1.55 oz |
| Bibliografia |
70 Years of Radiotubes and V. Page 189
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77_G&R: Fin Stewart
Fin Stewart
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Just Qvigstad
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Collezione di
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| Conformità dei dati |
Ulteriori informazioni |
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