Radios antiguas y Radios de Colección
PR9
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País:
Gran Bretaña (GB)
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| Idéntica a |
PR9
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| Fuente principal
(es) |
1929 : - - Manufacturers Literature
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Usada en |
Radio/TV-reception etc. |
| Filamento |
Vf 3.5 Volt / If 0.063 Ampere / Direct / Battery = |
| Descripción |
3.5 to 4.0 volt heater
Z=24k ohms; Amp Factor =14
For HF and Detection
Some confusion surrounds the type number prefix of P.R. tubes.Some tubes located have a paper label stating GPR--, for example GPR3 and GPR4. Wireless World octobe9, 1929 does show tis. the tube review of Wireless World, November 1929 shows the prefix as being PR--.
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| Literatura |
- - Manufacturers Literature
Wireless World (The), London (WW, 79) October 9, 1929 & November 27, 1929
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PR9: Fin Stewart
Fin Stewart
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Just Qvigstad
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Colección personal de
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