Antique radios, Old Time Radios
BM31-1a
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Country:
Germany
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| Identical to |
BM31-1a
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| Filament |
Vf 6.3 Volts / If 0.4 Ampere / Indirect |
| Information source |
Universal Vade-Mecum, Electron Valves and Semiconductor Devices group 514
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