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The centre for Murphy Radio sales literature

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RCA Victor portable radio advertisement.

RCA VICTOR Counter Advertising Cardboard by courtesy of Mark Meijster, Amsterdam, The Netherlands

"Call of Crystal Radio": Students often build a crystal radio as a first step in engineering and electronics—or as a middle school science fair project.  Read this profile of an engineer who has built hundreds of crystal radio sets. A science kit is available for the Science Buddies Crystal Radio project! [Source: Science Buddies; image: Wikipedia, Crystal Radio Set diagram from 1920s]

In the the United States government publication, "Construction and Operation of a Simple Homemade Radio Receiving Outfit", showed how almost any person handy with simple tools could a build an effective crystal radio receiver.

marxy's musing on technology: May 2012

A bloke with too many hobbies.


Hugo Gernsback, perhaps better known as the ‘Father of Science Fiction’ (and currently eponymously celebrated in the ‘Hugos’ Science Fiction Awards) also invented and built…