This AM Stereo exciter will furnish between 2 and 10 mW of low-distortion C-QUAM encoded AM Stereo into a 50 ohm load. C-QUAM (Compatible Quadrature Amplitude Modulation), developed by Motorola in the late 1970s, is the standard used in the United States, Mexico, Canada, and almost anywhere else that stereo broadcasting is permitted on the medium wave band.

A short lead attached to the output of this unit will provide enough signal for bench testing of receivers or for demonstrational purposes. With a suitable linear amplifier attached to the output, the unit could be used for over-the-air or carrier current broadcasting.

The purpose of this page is to promote AM Stereo by providing links to resources on AM Stereo, such as theory of operation, lists of AM stations broadcasting in stereo, makes and models of AM Stereo receivers, etc. For electronics experimenters who wish to build an AM stereo transmitter, detailed information is available on the theory of operation behind this unit and on assembly of the exciter. Proof of perfomance measurements on prototype unit that I've constructed are also provided.

As interest in this site continues to grow, so will the site. Send ideas for future improvements to the site and the circuit to alfredot@inetarena.com. Thank you for visiting!