Antique radios, Old Time Radios
A-P_Rectifier
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Country:
United States of America (USA)
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| Identical to |
A-P_Rectifier
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| First year |
May.1921
Saga of the Vacuum Tube, Tyne page 176, 177
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| Base |
UV-Base (4 Pins+Bayonet, USA 1914 WE)
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Direct |
| Description |
This tube is based on the de Forest rectifier and has a Shaw base with the grid pin not connected. It was first Announced in the May 1921 issue of radio News as a New rectifier tube for experimental continuous wave work. With the aid of a small transformer, it could step up mains voltages to 350. 500 or 750 volts, thus making a high voltage generator no longer necessary.
Text in other
languages (may
differ)
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| Information source |
Saga of the Vacuum Tube, Tyne page 176, 177
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A-P_Rectifier: Fin Stewart
Fin Stewart
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Just Qvigstad
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