HAM Radio 101

Word of the Day: “175 Mile Radius” in Amateur Radio

Here’s a phrase that pops up in the fine print of many Ham Radio contest rules. It means a geographic requirement for groups of stations jointly submitting their scores as part of the club competition in ARRL contests. In the “unlimited” category of club competition, stations submitting their scores as part of a club for the club competition must either be within a single ARRL section, or within a 175 mile radius of a centroid, to be eligible to contribute their score to the club total.

Editor’s Note: Amateur Radio has its own lingo, so we’re covering that unique terminology in our daily Word of the Day column for novice HAM radio enthusiasts.

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