Antique radios, Old Time Radios
B4H
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Country:
Great Britain (UK)
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| Identical to |
B4H
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| First year |
1923
Saga of the Vacuum Tube, Tyne 389
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| First Source
(s) |
1924 : British Radio Valves - The Vintage Years: 1904-1925 p.45
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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 6 Volts / If 0.25 Ampere / Direct / Battery = |
| Description |
Contrary to Tyne, Thrower states that although the B4H was announced in 1924, it was not generally available until end of 1926 or early in 1927.
Specified for use as a detector and HF amplifier.
Va range 60 to 150 volts, with an Ra of 28000 ohms and µ of 20.
Text in other
languages (may
differ)
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| Information source |
- - Manufacturers Literature Advertisement Feb 1927
History of the British Radio Valve to 1940 Page 163
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B4H: Fin Stewart
Fin Stewart
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Just Qvigstad
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Collection of
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