Antique radios, Old Time Radios
Electro_Audion
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Country:
United States of America (USA)
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| Identical to |
Electro_Audion
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| First Source
(s) |
May.1911 : -- Original prospect or advert 1911 Electro Importing Catalog Nr.10
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| Base |
Edison medium E14 = 14 mm, mignon
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| Filament |
Vf 4 Volts / Direct / Battery = |
| Description |
Bought from McCandless, the tube is mounted at a base block of insulating material with the matching Edison socket (either candelabra base or E14) and 5 terminals .
What makes this tube unique is that it is upright, which for other spherical audions left the filament in a position to sag and fold over when hot. This problem was avoided by the addition of a center support that held the filament up when it got hot, preventing it from deforming during use.
Number of tubes being bought from McCandless:
104 in 1911
156 in 1912
211 in 1913
Must not be confused with the completely different "Electron Audio".
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| Information source |
Saga of the Vacuum Tube, Tyne p.187
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Just Qvigstad
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