Antique radios, Old Time Radios
A-21
Country:
United States of America (USA)
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Identical to |
A-21
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Base |
Jumbo 4-pin bayonet (1918)
Top contact with a cap.
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Was used by |
Transmittertube (Radio) |
Filament |
Direct |
Information source |
-- Collector info (Sammler)
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Just Qvigstad
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