Radio experimenters often need a variable capacitor to tune their circuits, as the saying goes, for maximum smoke. In decades past these were readily available from almost any scrap radio, but the ...
Marked: "Electro Importing Co. / New York"; "Assembler No. 11 finished this instrument. Any defect should be promptly reported to Electro Importing Co., 233 Fulton St., N.Y."; on face plate: "Trade ...
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