A Knowledge about amateur radio DXers |
Posted: September 15, 2016 |
The challenge is to pick radio signals to an incredible distance. In other parts of the world there are still hundreds of radio stations, one in their continent has never heard of it, but that could be included in your site up under ideal conditions - an experienced DXers who knows what, where and when to hunt , If you want to listen to DX FM, you know that the same stations to hear every day. FM radio signal radiates from the transmitting antenna in all directions directly. Because the earth is round, and the FM signal, the FM radio station will not bow usually heard far beyond the horizon. In exceptional circumstances, even an FM signal from the atmosphere can be recovered, and this special reception conditions, FM amateur radio DXers. Comparison of the band of medium wave (AM) during the day and at night - the tape when the complete signal supports remotely night listening. However, most DXers are interested AM (medium wave) and shortwave stations. If you listened to the AM band, you know that several stations at night support to hear the day. In fact, on the night of a particular layer of the ionosphere (part of the atmosphere) is reflected back to Earth signals. Sunlight, however, creates a new type of variable lower layer at an altitude of, weaken the radio signals, especially in the AM band, so cannot be heard metro stations you. Therefore, AM reception route is usually possible if the transmitter and receiver - and the way in between - classified in the dark. Radio propagation in most shortwave frequencies is quite similar. Therefore, at sunset, DXers forward to try to hunt for signals from the East. Similarly, the sunrise is the best time to listen to stations west. In these times the other directions stations jamming are not as strong as for example, at midnight, when all possible directions when stations are heard and can interfere with each other. Change the reception conditions due to a variety of factors constantly, some of which are not predictable. Therefore, the few recordings of finding a permanent monitoring stations audible.DXers requires collecting these controls - known as QSL - as a reminder of his findings on the dial, and also to show the number of stations that were able to collect. Conclusion: Although QSL not the final proof of listening are drawn to a station into consideration - as some stations regularly confirm underreporting and other stations respond as good as ever to all reports - the rest QSL collection activities important for many DXers. Competitions between DXers based on the number of received QSL. Increasingly, since the station identifications collected records, counted and recorded as evidence of the remote stations hearing.
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