Ever wonder what that “AM” button is for on your transceiver? Well, if you don’t know about full-carrier amplitude modulation (AM) or have never used it on the air, you’ll get the chance during the AM Rally, April 1-3, on the HF bands between 160 and 10 meters (except 30, 17, and 12 meters) plus 6 meters. Amateur Radio voice-mode transmissions on the HF bands into the 1960s were AM, the same mo...
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