Antique radios, Old Time Radios
BD-309
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Country:
United States of America (USA)
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| Identical to |
BD-309
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| Predecessor Tubes |
MO-10R
6704
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| Base |
SPECIAL TUBEBASE in general
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| Was used by |
Technology / Measurement |
| Filament |
Vf 6.3 Volts / If 0.3 Ampere / Indirect |
| Description |
Shielded version of MO-10R/6704. 10MHz max counting speed.
Operating principle of trochotron.
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| Data Compliance |
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