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Homebrew W1IM Scanning Disc, 1928 (U.S.A.) This home-made scanning disc television unit was built by the Connecticut radio experimenter, Clifford Fraser, using hand-written instructions sent to him by the mechanical television pioneer and broadcaster, Charles Jenkins. Jenkins was aware that "Radiovision" was in its infancy and actively encouraged involvement, experimentation and the exchange of information within the amateur radio community. In the late 1920's, he even went so far as to offer Radiovisor Kits similar to this one at $7.50 U.S. postage paid - a price so low that it meant a loss for his company.