Antique radios, Old Time Radios
Pyramid-1A
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Country:
Great Britain (UK)
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| Identical to |
Pyramid-1A
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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 5.5 Volts / If 0.34 Ampere / Direct |
| Description |
This tube is a modified Pyramid-1. It was designed for use as a last audio stage. It has an impedance of 4000. Ohms
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| Information source |
- - Manufacturers Literature Undated tube data booklet, c. 1925, p.17
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Just Qvigstad
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| Data Compliance |
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