Letter to the Editor: AM Stereo Is Still an Option


Want revitalization? Mandate AM stereo in any FM stereo radio.

A recent Radio World article about an AM monitor receiver included the author’s comment, “No, analog AM stereo is not making a comeback.”Please know 100 stations in the United States still broadcast in C-QUAM AM stereo, and there are more returning. A Class B AM station in the New Orleans market will be starting C-QUAM as I write. There is one in Texas and more thinking about it. Australia has announced four stations there will be begin C-QUAM stereo transmissions in the next month or two.It’s a shame that auto receiver manufacturers do not include C-QUAM in their products. But thousands of AM stereo car radios are still in use in Australia. In the U.S., that number will likely be higher since cars are now peaking in their lifespan, averaging as much as 17 years; with over 250 million on the road, that can mean a fairly large number out there still with a C-QUAM-capable radio, not to mention that certain HD car radios can decode C-QUAM, though not in wide bandwidth fidelity.

The HD Radios only need some code written to decode it and open up the bandwidth for full analog fidelity while also doing DSP-based noise blanketing to reduce static noise and do signal-based adaptive bandwidth so the adjacent channel is not a problem on weak signals.

Wanna hear AM stereo? Go to WION’s web site and listen to their stream off their Carver TX11B receiver.

Read more  HERE.


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