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1) Product sheet for the Jefferson Long Wave (Intermediate Frequency) Amplifier, No. 150 L.W. Undated. 2) "How to Build a Resistance Coupled Amplifier," published by Electrad Inc., New York, NY. Undated. (Filed under "Amplifier")
Electronics (LCSH) Amplifiers (Electronics) (LCSH) Amplifiers, Radio frequency (LCSH) Jefferson Electric Manufacturing Co. (Chicago, Ill.) Electrad, Inc. (New York, N.Y.)