Amateur frequency allocations
Graphical Frequency Allocations
Frequency Allocations
US Amateur Radio Frequency Allocations. Graphical Chart ยท Regulatory Information Branch. For each band, only those license classes with privileges on that.
Information about the US Amateur Bands is available on the Frequency Allocations page as well as the frequency bands chart.
Description:Ham operators seek to exploit the limits of the frequencies usual characteristics looking to learn, understand, and experiment with the possibilities of these enhanced propagation modes. Sporadic band openings[ edit ] Occasionally, several different ionospheric conditions allow signals to travel beyond the ordinary line-of-sight limits. Some amateurs on VHF seek to take advantage of "band openings" where natural occurrences in the atmosphere and ionosphere extend radio transmission distances well over their normal range.
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