Antique radios, Old Time Radios
DA250
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Country:
Great Britain (UK)
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| Identical to |
DA250
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| Base |
L4 British large 4 pin (1922, LG4)
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| Filament |
Vf 10 Volts / If 2 Ampere / Direct / Specified voltage AC/DC |
| Description |
Va <2500, Pa <250W, gm =7mA/V at Ia=0.1A, 2.5kV.
A pair operating in class AB2 can produce 800W of audio power.
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Dimensions (WHD)
incl. pins / tip |
113 x 375 x mm / 4.45 x 14.76 x inch |
| Information source |
Taschenbuch zum Röhren-Codex 1948/49
- - Manufacturers Literature GEC data sheet April 1952
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DA250: GEC's catalogue supplement
Anonymous 413 Collector
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Just Qvigstad
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DA250: MARCONI RECEIVING VALVES, LONDON, 1938
Jose Casas-Avalos
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