Duplexer and Repeaters: Basic Information
Duplexers and Repeaters Some Basic Information BY ROBERT A. LEHNING*, WA2YSJ All across the country there are many amateur repeate stations operating on 2 meters, 220 and 440 MHz, and to some extent on 1.2 GHz. Several modes of operating such as FM, ATV, and packet (digital) have also become...