Antique radios, Old Time Radios
HE/AC1
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Country:
Great Britain (UK)
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| Identical to |
HE/AC1
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| Similar
Tubes |
Other characteristic (electr. data):
MR/AC1
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| Base |
Europe 5-Pin , B5 (Eu O, F, O5A) 1928
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| Was used by |
Industrial |
| Filament |
Vf 4 Volts / If 1.2 Ampere / Indirect / Specified voltage AC/DC |
| Description |
Helium type. Designed for use in time-base circuits for oscillographs and television scanning where faster speeds than the mercury vapour type are required.
Va <1kV, Ia <150mA.
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Dimensions (WHD)
incl. pins / tip |
50 x 120 x mm / 1.97 x 4.72 x inch |
| Information source |
British Radio Valves - The Classic Years: 1926-1946 Supplement, p. 155
- - Manufacturers Literature 1937 data
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49
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