Antique radios, Old Time Radios
2V-P1f_E27
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Country:
Great Britain (UK)
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| Identical to |
2V-P1f_E27
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| Similar
Tubes |
Other base:
2V-P1f
; 2V-P1f_B22
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| Base |
Edison big E27 = 27 mm
2 Sidecontacts.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Direct / Battery = |
| Description |
this "soft" tube was designed by Captain Henry J Round for the Marconi Wireless Telegraph Company. Intended for military use, they were first utilised as telephone repeater tubes, having a high gain. They were unrelible as the gas pressure was known to fail. This problem was overcome by warming the asbestos in the tube at the top of the bulb.
They were used in the British Military during World War One as somewhat sensative detectors, when properly adjusted
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Dimensions (WHD)
incl. pins / tip |
x 167 x 51 mm / x 6.57 x 2.01 inch |
| Weight |
57 g / 2.01 oz |
| Information source |
British Radio Valves - The Vintage Years: 1904-1925 Pages 17 & 19
Saga of the Vacuum Tube, Tyne Pages 207 - 209
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Just Qvigstad
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Collection of
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