10-meter band

[1] The 10-meter band was allocated on a worldwide basis by the International Radiotelegraph Conference in Washington, DC, on 4 October 1927.

American Novice and Technician class licensees were granted CW and SSB segments on the 10 meter band as of 21 March 1987.

Being a very wide band in HF terms, many different transmission modes can be found on 10 meters.

At peak times of the solar cycle when many sunspots appear on the Sun's surface, 10 meters can be alive with extremely long-distance signals, refracting from the F2 layer in the ionosphere.

Generally speaking, the most effective and efficient propagation of 10-meter radio waves takes place during local daylight hours.

During periods of increased sunspot activity, band openings may begin well before sunrise and continue into the night.

Even in times of solar minimum, when F2 is rarely available, 10 meters still has some long distance possibilities.

Sporadic E on 10 meters is mainly a seasonal event, with late spring and early summer being prime time for the mode.

In tropical latitudes 10 meters is open throughout the sunspot cycle, although propagation is often confined to other areas lying along the equator.

For example, a good path from West Africa to the Caribbean exists on 10 meters even at solar minimum.

https://www.jarl.org/English/6_Band_Plan/JARL%20Band%20Plan20230925(E).pdf Named for the segment of 10 meters granted for use to American Novice Class Amateur Radio license holders.

From 29.300 to 29.510 MHz the satellite sub band allows amateur radio operators to communicate with orbiting OSCARs.

Due to the very few available repeater channels, "odd-splits" (offsets differing from 100 kHz) and non-standard frequencies are rare and uncommon.

Since 10 meters can frequently open up to propagate globally, most 10-meter repeaters use a CTCSS sub-audible access tone.

Due to its unique nature, 10 meters has a large following of hobbyists who spend most of their time on this frequency band.