1936 Two Tube AC-DC Regen

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The plans for this simple two-tube set appeared eighty years ago this month in Radio Craft magazine, November, 1936.

With plug-in coils, the set tuned 10 to 600 meters, and the author reported picking up numerous European and other foreign stations in New York City with excellent volume. The set employed two tubes, either type 37 or 76. One served as rectifier, with the grid and plate terminals tied together. The other served as the regenerative detector which was “capable of picking up even the faintest of signals.” An antenna of 30-100 feet was recommended. No ground connection was necessary, since the house current took care of the ground.

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