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Everyone with interest in AM carrier current should have a print of two documents previously available in this website’s Library:
LOW POWER RADIO BROADCASTING – JAMES R. CUNNINGHAM
CARRIER CURRENT TECHNIQUES – ERNEST G. WILSON
Perhaps the Admins will know what happened to these documents and can restore them.
They contain valuable Carrier Current information, including…
1.) The History of Carrier Current in the U.S.;
2.) An Example of Designing and Building a Coupler;
3.) A very Novel Approach to Coupling Directly, WITHOUT a Coupler!
4.) Carrier Current Transmitter Schematics.