Antique radios, Old Time Radios
77_G&R
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Country:
Australia
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| Identical to |
77_G&R
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| First Source
(s) |
02.Nov.1923 : -- Original-techn. papers.
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Direct / Battery = |
| Description |
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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Dimensions (WHD)
incl. pins / tip |
x 120 x 25 mm / x 4.72 x 0.98 inch |
| Weight |
44 g / 1.55 oz |
| Information source |
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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Collection of
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after clicking the "tubes" tab or by clicking a tube
on a radio model page. You will find thousands
of tubes or valves with interesting links. You
even can look up radio models with a certain tube
line up.
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