Antique radios, Old Time Radios
DO20
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Country:
Great Britain (UK)
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| Identical to |
DO20
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| Similar
Tubes |
Normally replaceable-slightly different:
S34_HMV
Heater different:
CV1178
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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 7.5 Volts / If 1.3 Ampere / Direct / Specified voltage AC/DC |
| Description |
Max anode voltage 425 volts. Used as an output power valve for use with large moving coil speakers.
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| Information source |
Universal Vade-Mecum, Electron Valves and Semiconductor Devices group 138
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DO20: Fin Stewart
Fin Stewart
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Just Qvigstad
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1
Collection of
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| Data Compliance |
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