Antique radios, Old Time Radios
4D
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Country:
Spain
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| Identical to |
4D
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| Similar
Tubes |
Normally replaceable-slightly different:
A415
; B424
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / If 0.08 Ampere / Direct |
| Information source |
Taschenbuch zum Röhren-Codex 1948/49
Universal Vade-Mecum, Electron Valves and Semiconductor Devices 1950
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4D: rtt
Anonymous 10 Collector
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Just Qvigstad
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4D: Castilla 1930
Anonymous 15 Collector
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| Data Compliance |
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