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Results tagged with arrl
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user 207
American Radio Relay League (ARRL), the largest association of amateur radio enthusiasts in the USA
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What's the difference between national calling frequency and national simplex calling freque...
The simplex calling frequencies (146.520/446.000 Mhz) are intended for FM simplex communication, while the other pair (144.200/432.100) are for SSB. In general use, the term "simplex" implies FM modul …
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