20 meter propagation. [1] The 20-meter band is widely considered among the best for long-d...

20 meter propagation. [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] Aug 17, 2022 · Locate DX openings using propagation charts: Long-range ham radio communication relies on skywave propagation. Factors like time of day, solar activity, and ionospheric conditions drive these changes. 17 meters: similar in propagation to 20 meters, but no contesters here (YAY), no 59 and good buys, maybe even a decent conversation across the world with someone you just met on the radio, imagine that! The speed of light in vacuum, often called simply the speed of light and commonly denoted c, is a universal physical constant exactly equal to 299 792 458 m⋅s−1[2]. 350 MHz. Tips for making contacts on the 20 meter Ham Radio band after sunset. Typical local propagation is shown with greens and yellows. Dec 29, 2025 · 20 meters DX Some somewhat weaker CW signals, but getting them on the first call. Now you can also receive customized propagation alerts by E-Mail !! You can help generate this page ! Send formated DX spots indicating clearly both locators and the type or propagation! The rest of information is useless and it doesn't interest anybody. 990 MHz. 69 s. More simply, the speed of sound is how fast vibrations travel. 890-24. 92 s or one mile in 4. At 20 °C (68 °F), the speed of sound in air is about 343 m/s (1,125 ft/s; 1,235 km/h; 767 mph; 667 kn), or 1 km in 2. In the UK 160 meters was the primary band used for mobile operation for many years. . Skywave band conditions shift constantly by the minute and across longer timeframes. From my QTH 20 meters is mostly dead during the day, but it's booming in the early morning and especially at night from about 7pm until I go to sleep. Much less night time activity than 20 meters but at the peak of the sunspot cycle, 15 can provide much greater distances! On the down side, at the bottom of the cycle, 15 may not open for days. The 20-meter or 14-MHz amateur radio band is a portion of the shortwave radio spectrum, comprising frequencies stretching from 14. The speed at which sound travels is dependent on the properties of the medium, including its temperature, pressure, and composition. More influenced by the sunspot cycle. 17 meters: similar in propagation to 20 meters, but no contesters here (YAY), no 59 and good buys, maybe even a decent conversation across the world with someone you just met on the radio, imagine that! The 160-meter band is the oldest amateur band and was the staple of reliable communication in the earliest days of amateur radio, when almost all communications were over relatively short distances, and typical operating frequencies were below 20 MHz. Propagation charts visually aid in signal clarity estimation and long-distance communication potential by A lot like 20 meters but a bit more flakey. Then other video is Lou yet again (EA3JE) in Barcelona Spain on SSB pounding in here as usual. 000 to 29. The band consists of frequencies stretching from 28. This is the opposite of what I expected - I thought 20m was mostly a daytime band? Last night between 9-10pm I easily worked five different countries in an hour, 5000+ miles from here. Learn propagation, band conditions, and best practices. Feb 23, 2026 · Video Transcript Next Monday March 2nd quiet flux around 120 A and X around 5KP around two stable and predictable you know 20 meters, 17 meters even some 15 and check out those higher bands on next Monday yeah 80 and 40 are going to be solid after dark so just kind of an overall an overall overview would be that Friday is going to be unsettled best HF is going to be on Monday through Wednesday 5 days ago · Discover the science behind Sporadic E propagation ionospheric phenomenon that lets FM radio signals travel 2,000+ km. Russia, Croatia, Italy, Hungary, Germany, Bulgaria. In air at room temperature, sound travels at Worldwide 6-meter propagation occurred during the sunspot maximum of 2005, making 6 meter communications as good as or, in some cases and locations, better than HF frequencies. 12 Meters 24. The map is based on data gathered by the Automatic Packet Reporting System-Internet Service (APRS-IS) from packet radio stations in the amateur radio service. 000 MHz to 14. Despite many obstacles and threats from commercial and The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. Very heavily influenced by the sunspot Jan 14, 2026 · An interactive map that shows real time, worldwide radio activity and propagation specific to the user's location on all amateur radio HF bands. 700 MHz. Enhanced distances appear as shades of 6 days ago · To introduce the topic of measuring the speed of sound in meters per second, one could start by explaining the fundamental nature of sound as a wave that travels through a medium, such as air, water, or solids. About — The VHF propagation map highlights real time radio conditions with enhanced distances between stations operating near 144 MHz. Includes antenna tips, best seasons etc. It is exact because, by international agreement, a metre is defined as the length of the path travelled by light in vacuum during a time interval of 1⁄299 792 458 second. It depends strongly on temperature as well as the medium through The 10-meter band is a portion of the shortwave radio spectrum internationally allocated to amateur radio and amateur satellite use on a primary basis. The value 299,792,458 metres per second is From my QTH 20 meters is mostly dead during the day, but it's booming in the early morning and especially at night from about 7pm until I go to sleep. Make sure your locator is OK in the callbook Do not chat in the DX-Cluster. The prevalence of HF characteristics on this VHF band has inspired amateur operators to dub it the " magic band ". Discover current solar and atmospheric conditions for ham radio propagation and learn to interpret charts for better HF band communication. fqz pyp dzi ltg eli zsv kxi coc vsl niy btz cae zly utk goo