Quote:
Originally Posted by zombie1210
Series string? SO, that means when one tube goes out, nothing works in the radio at all? Pardon my tube illiteracy.
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It means if one filament opens none of the tubes will operate. One tube could have a short or no emission but a good filament and the other tubes would function despite the 1 tube having a defect.
Also, these battery tubes have extremely dim filaments. They may be difficult to see even in a dark room.