Antique radios, Old Time Radios
ES4
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Country:
Great Britain (UK)
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| Identical to |
ES4
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| Similar
Tubes |
Normally replaceable-slightly different:
R_Marconi
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| First year |
1921
Saga of the Vacuum Tube, Tyne page 372, 373, 395
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| First Source
(s) |
1920 : History of the British Radio Valve to 1940 p. 155
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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 / If 0.75 Ampere / Direct / Battery = |
| Description |
First made in 1920, this tube was designed by John Scott-Taggart and was similar in appearance and characteristics to the R tube. While working for a year from 1919 to 1920, as head of the tube department of Edison-Swan, He designed the ES2 and ES4 tubes. He left to further his radio interests elsewhere. Over the next few years he designed other tubes and some of these were made for him by Mullard. He was a well known author during (and after) World War One and he was in various signals units of the British Army. He was also a technical officer involved in radar training and maintenance in World War Two.
With 1 amp at 6 v to the filament and up to 1000 v at the plate it could be used as a transmitter up to about 30 watts!
Text in other
languages (may
differ)
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| Information source |
Saga of the Vacuum Tube, Tyne Pages 372, 373 & 395
British Radio Valves - The Vintage Years: 1904-1925 Page 31
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ES4: Fin Stewart
Fin Stewart
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Just Qvigstad
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Collection of
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