Antique radios, Old Time Radios
220SG
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Country:
Great Britain (UK)
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| Identical to |
220SG
|
| Similar
Tubes |
Normally replaceable-slightly different:
B242
Heater different:
410SG
; 6075SG
; 610SG
|
| First Source
(s) |
22.Nov.1935 : Wireless World (The), London (WW, 79)
Aug.1930 : Philips Bulletin R1164, p. 16
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Er)
Top contact screw type.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2 Volts / If 0.2 Ampere / Direct / Battery = |
| Description |
Ra 200k ohms; gm = 1mA/V at Vg=-1.5 and Va=150.
Price 1.1 GBP in 1929.
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| Information source |
Babani, International Radio Tube Encyclopaedia p. 30 & 31
History of the British Radio Valve to 1940 p.145 & 183
- - Manufacturers Literature
Taschenbuch zum Röhren-Codex 1948/49
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220SG: Telefunken Werkstattbuch
Wolfgang Bauer
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Just Qvigstad
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220SG: COSSOR VALVE MANUAL 1935-6
Jose Casas-Avalos
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):7
Collection of
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