Antique radios, Old Time Radios
GPR4
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Country:
Great Britain (UK)
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| Identical to |
GPR4
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| First Source
(s) |
1929 : - - Manufacturers Literature
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2 Volts / If 0.35 Ampere / Direct / Battery = |
| Description |
For RC audio coupling.
Some confusion surrounds the type number prefix of P. R. tubes. Some tubes located have a paper label stating GPR--, for example the GPR3 and GPR4, Wireless World, October 9, 1929 shows the prefix of all tubes as GPR, while Wireless World November 27, 1929 shows tubes prexixed as PR--. ,
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| Information source |
Wireless World (The), London (WW, 79) October 9, 1929 & November 27, 1929
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GPR4: Fin Stewart
Fin Stewart
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Just Qvigstad
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Collection of
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