Radios antiguas y Radios de Colección
R4B_BTH
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País:
Gran Bretaña (GB)
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Marca:
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| Tipo: |
Triode, vacuum Universal |
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<1925 very rare |
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| Idéntica a |
R4B_BTH
= R4B_MO
= R4B_Marconi
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| Primera serie |
1922
Saga of the Vacuum Tube, Tyne page 220
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| Válvulas Predecesoras |
R4A
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
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| Usada en |
Militaire et/ou Services Publics |
| Filamento |
Vf 3.5 Volt / If 0.46 Ampere / Direct |
| Descripción |
The R4B tube was first made in 1918 and had an E12 base. In the following years, this was changed to B4 but date of the changeover is uncertain.
Texto en otros idiomas
puede diferir
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| Literatura |
British Radio Valves - The Vintage Years: 1904-1925 pages 27 & 40
Saga of the Vacuum Tube, Tyne Page220
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R4B_BTH: Fin Stewart
Fin Stewart
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Just Qvigstad
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[rmxtube-en]
| Cumplimiento de datos |
Más información |
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