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Amateur radio contests are not run on the WARC bands. 20 metres – 14.000–14.350 MHz – 21.41–20.89 m actual; Considered the most popular DX band; usually most popular during daytime. QRP operators recognize 14.060 MHz as their primary calling frequency within the band. Users of the PSK31 data mode tend to congregate around 14.070 MHz.
Police code. A police code is a brevity code, usually numerical or alphanumerical, used to transmit information between law enforcement over police radio systems in the United States. Examples of police codes include "10 codes" (such as 10-4 for "okay" or "acknowledged"—sometimes written X4 or X-4), signals, incident codes, response codes, or ...
CTCSS tone codes are sometimes referred to as sub-channels, but this is a misnomer because no additional radio channels are created. All users with different CTCSS tones on the same channel are still transmitting on the identical radio frequency , and their transmissions interfere with each other; however; the interference is masked under most ...
Letter beacon. Signal of letter beacon D on 5137.5 kHz. Letter beacons are radio transmissions of uncertain origin and unknown purpose, consisting of only a single repeating Morse code letter. They have been classified into a number of groups according to transmission code and frequency, and it is supposed that the source for most of them is ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 19 September 2024. Number referring to cannabis 420 originally "4:20 Louis" Statue of Louis Pasteur at San Rafael High School, by Benny Bufano (1940), site of the earliest 4:20 gatherings in 1971 Observed by Cannabis counterculture, legal reformers, entheogenic spiritualists, and general users of ...
70-centimeter band. The 70-centimeter or 440 MHz band is a portion of the UHF radio spectrum internationally allocated to amateur radio and amateur satellite use. The ITU amateur radio allocation is from 430 to 440 MHz; however, some countries, such as the United States, allocate hams 420 to 450 MHz. Depending on the country the band is shared ...
Everyday the Waldos would meet at 4:20 p.m. under the school’s Louis Pasteur statue to smoke and then, with treasure map in hand, go out to hunt for the plant. ... Some say 420 is police code ...
The 20-meter or 14-MHz amateur radio band is a portion of the shortwave radio spectrum, comprising frequencies stretching from 14.000 MHz to 14.350 MHz. [1] The 20-meter band is widely considered among the best for long-distance communication ( DXing ), and is one of the most popular—and crowded—during contests . [ 2 ]