Antique radios, Old Time Radios
R4B_Marconi
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Country:
Great Britain (UK)
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| Identical to |
R4B_Marconi
= R4B_BTH
= R4B_MO
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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 4 Volts / Direct / Battery = |
| Description |
The R4B was first made in 1918 and had an E12 base. In the following years, this was changed to B4. The date of the changeover is uncertain.
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Dimensions (WHD)
incl. pins / tip |
x 86 x 50 mm / x 3.39 x 1.97 inch |
| Weight |
33 g / 1.16 oz |
| Information source |
-- Original prospect or advert as per advert in
British Radio Valves - The Vintage Years: 1904-1925 Pages 26, 40 and 122
Saga of the Vacuum Tube, Tyne
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R4B_Marconi: Fin Stewart
Fin Stewart
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Just Qvigstad
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Collection of
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