Antique radios, Old Time Radios
Audion_01-twoelectr
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Country:
United States of America (USA)
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Brand:
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DeForest-Tubes |
| Developer: |
DeForest-Tubes |
| Tube type: |
Gas Diode Detector |
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<1925 extraordinarily rare. Production was less
than 100 items. **** |
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| Identical to |
Audion_01-twoelectr
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| First year |
1906
Saga of the Vacuum Tube, Tyne
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| Predecessor Tubes |
Fleming_exp
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Successor Tubes
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1907
AUDION_DeForest
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| Base |
Edison (candelabra) 12 mm
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / Direct / Battery = |
| Description |
This tube is first made late in 1905 by H. W. McCandless and Company for the de Forest Radio Telephone and Telegraph Company. It had a four volt carbon filament and was fitted with an E12 Edison screw base. The nickel anode "lead-in" wire entered the glass bulb a few millimetres from the exhaust tip at the top of the bulb. de Forest had acquired a Fleming two electrode tube and asked McCandless if he could make six copies. de Forest applied for a patent on May 19th, 1906 and this was granted on November 13th of the same year. the patent number is 836070. The successors were the Audion_02-electrostatic and Audion_03-electromagnetic developed late in 1906.
Text in other
languages (may
differ)
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Dimensions (WHD)
incl. pins / tip |
x x 25 mm / x x 0.98 inch |
| Information source |
Saga of the Vacuum Tube, Tyne Pages 53,55,&58
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Audion_01-twoelectr: Fin Stewart
Fin Stewart
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