Antique radios, Old Time Radios
PR1
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Country:
Russian Federation
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| Identical to |
PR1
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| First year |
1919
??
Saga of the Vacuum Tube, Tyne page 273
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| Predecessor Tubes |
TM
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Was used by |
Military and/or Government |
| Filament |
Direct / Battery = |
| Description |
Tube designed by Mikhail Alexandrovich Bontsch-Brujewitsch. He studied the design of the French TM tube and developed a similar style tube. The main difference was that the anode was a sheet of aluminium. This was necessary as normal metals used in anodes was not available at the time. According to Tyne, the tube was perfected towards the end of 1919.
Text in other
languages (may
differ)
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| Information source |
Saga of the Vacuum Tube, Tyne Pages 272-273
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PR1: Fin Stewart
Fin Stewart
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Just Qvigstad
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