A battery (vacuum tubes)
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In electronics, an A battery is any battery used to provide power to the filament of a vacuum tube. It is sometimes colloquially referred to as a "wet battery" (although there's no reason why a "dry" battery of suitable voltage couldn't be utilised for the purpose) The term comes from the days of valve (tube) radios when it was common practice to use a dry battery for the plate (Anode) voltage and a rechargeable lead/acid "wet" battery for the filament voltage.
Image:A battery (Eveready -742).jpg Image:A Circuit.png
[edit] See also
[edit] External link
- Instructions for Operating The Crosley 51 Radio Receiver Examples of usage of A, B, and C batteries in an early radio.
