C battery (vacuum tubes)
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In electronics, a C battery is any battery used to provide bias to the control grid of a vacuum tube. Until the early 1930s this was common practice in valve (tube) radio sets but was largely superseded by grid leak resistors or voltage divider biasing.
[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.