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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 ]
Frequency Amateur band Mode; 1.855 MHz 160 meters LSB 3.99 MHz 80 meters LSB 7.29 MHz 40 meters AM, double-sideband 14.29 MHz 20 meters USB 18.16 MHz 17 meters USB 21.39 MHz 15 meters USB 28.59 MHz 10 meters USB 50.350 MHz 6 meters USB 147.555 MHz 2 meters FM
Shortwave bands are frequency allocations for use within the shortwave radio spectrum (the upper medium frequency [MF] band and all of the high frequency [HF] band). Radio waves in these frequency ranges can be used for very long distance (transcontinental) communication because they can reflect off layers of charged particles in the ionosphere and return to Earth beyond the horizon, a ...
Five 2.8 kHz-wide channels are available in the U.S., centered on 5.332, 5.348, 5.368, 5.373, and 5.405 MHz. Since most radios in SSB mode display the (suppressed) carrier frequency, in USB mode the dial frequencies would all need to be set 1.5 kHz lower. Voice operation is generally in upper sideband mode, which is mandatory in the U.S. . The ...
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Most amateur digital modes are transmitted by inserting audio into the microphone input of a radio and using an analog scheme, such as amplitude modulation (AM), frequency modulation (FM), or single-sideband modulation (SSB). Amateur teleprinting over radio (AMTOR) D-STAR (Digital Data) a high speed (128 kbit/s), data-only mode.
The first ten transceivers Swan produced were serial numbered from 101-1 to 110-1, with the first nine being model SW-120 operating on 20 meters (14 MHz), and the tenth, 110-1, being the first SW-140, operating on 40 meters (7 MHz). The SW-175 then covered the 75 meter band (3.8 MHz).
40 meters: 7.18 MHz (New suggested frequency to include General Class licensees) LSB 40 meters: 7.214 MHz Australian digital SSTV frequency (Easypal and DIGTRX) LSB 20 meters: 14.23 MHz Frequency 1 analog: USB 20 meters: 14.233 MHz Frequency 2 analog to alleviate crowding on 14.23: USB 15 meters: 21.34 MHz: USB 11 meters: 27.7 MHz (pirate radio ...