Radio Antica e Radio d'epoca
SP50R
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Stato:
Gran Bretagna (Regno Unito)
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| Identico a |
SP50R
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| Valvole
simili |
Sostituita normalmente - piccola diff.:
B605
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| Prime
informazioni |
Sep.1927 : Wireless World (The), London (WW, 79)
Aug.1930 : Philips Bulletin R1164, P.14
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| Zoccolo |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Utilizzata per |
Radio/TV-reception etc. |
| Filamento |
Vf 6 Volt / If 0.25 Ampere / Direct / Battery = |
| Descrizione |
The SP50R (or Red coded) is one of the "shortpath" tubes developed by Metropoliton-Vickers branded Cosmos.
The SP50B (or Blue coded)is of similar construction and used as an AF amplifier.
Story of Cosmos valves see here
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| Bibliografia |
70 Years of Radiotubes and V. p.196
History of the British Radio Valve to 1940 p.161
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SP50R: Fin Stewart
Fin Stewart
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Just Qvigstad
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Collezione di
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[rmxtube-en]
| Conformità dei dati |
Ulteriori informazioni |
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