Antique radios, Old Time Radios
727A
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Country:
United States of America (USA)
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| Identical to |
727A
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| Similar
Tubes |
Normally replaceable-slightly different:
395-A
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| Base |
Wires only.
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| Filament |
--/-- |
| Description |
Small size, cold cathode thyratron, used for relay service. The tube also gives a visual indication of its conduction through the flat top window. 140V, 13mA.
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| Information source |
Tube Lore (I)
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727A: Manufacturer's Literature
Emilio Ciardiello
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