AC/DC receiver design

AC/DC receiver design
An "All American Five" vacuum tube radio, a classic example of an AC/DC design.
Component typePower supply design for vacuum tube receivers
Invention year1930s

An AC/DC receiver design is a style of power supply of vacuum tube radio or television receivers that eliminated the bulky and expensive AC-only mains transformer. Having no mains transformer, receivers could operate from a DC supply as well as an AC supply (i.e., "AC/DC"), a feature which became less important as DC domestic electricity fell out of use. The design was maintained regardless due to its lower cost.

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