Antique radios, Old Time Radios
HD410D
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Country:
Germany
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| Identical to |
HD410D
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| Base |
Europe 4-Pin B4 (Eu A, E, 4A) 1914
Top contact with a cap.
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| Filament |
Vf 4 Volts / If 0.1 Ampere / Direct |
| Information source |
Universal Vade-Mecum, Electron Valves and Semiconductor Devices group 150
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Just Qvigstad
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