Antique radios, Old Time Radios
Pyramid-4
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Country:
Great Britain (UK)
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| Identical to |
Pyramid-4
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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 1.8 Volts / If 0.68 Ampere / Direct |
| Information source |
British Radio Valves - The Classic Years: 1926-1946 P. 251 & 332; Supplement, p. 85
- - Manufacturers Literature Undated data booklet c. 1925, p. 19
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Pyramid-4: Fin Stewart
Fin Stewart
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Just Qvigstad
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