Antique radios, Old Time Radios
U/4KW
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Country:
Great Britain (UK)
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| Identical to |
U/4KW
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| Base |
Wires
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| Was used by |
Transmittertube (Radio) |
| Filament |
Vf 21 Volts / If 40 Ampere / Direct |
| Description |
This tube has a silica bulb. Development of silica tubes is detailed o pages 72 - 75 of "British Radio Valves, the Vintage Years 1904 - 1925",
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Dimensions (WHD)
incl. pins / tip |
x 635 x 114 mm / x 25.00 x 4.49 inch |
| Information source |
British Radio Valves - The Vintage Years: 1904-1925 p. 129
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