The regenerative radio is long-ago superseded in commercial receivers, but it remains a common project for electronics or radio enthusiasts seeking to make a simple receiver. It’s most often seen for ...
Marked: "Grebe Radio (trade mark) / Richmond Hill, N.Y. / Type CR-5 / 150 to 3000 M / Licensed Under Armstrong Patent 1113149, Oct. 6, 1914 / Licensed Under Marconi Patent 783772, June 28, 1904." This ...
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