Antenna for HF-VHF-UHF - This simple little circuit can be used for AM, FM, and Shortwave (SW). Lastly, make sure you solder your connections together, such as where the lead-in wire connects to the antenna, and coat the connection with silicon to protect it from the elements. Magnum Dynalab SR-100 Best Indoor FM Radio Antenna. Make sure that the ends of the antenna are insulated by using commercial glass or plastic insulators or make your own by cutting 1 ½- to 2-inch in diameter PVC pipe into 3-inch long sections (at a minimum) and drilling holes in the ends to connect the wire to. The height of the antenna off the ground isn't critical, but it is best to try to keep it at least 20 feet off the ground. cost is made possible by modifying a RadioShack FM broadcast receiving antenna. Indoor shortwave antenna options to pair with a new SDR. The lead-in wire from the antenna to your receiver should be insulated so that it will not short against anything as it enters your home, such as the metal screen in your window or aluminum siding. This is a great antenna for shortwave receivers, as well as HF ham radio with an antenna tuner. Generally a stretch of between 30 and 100 feet will work. Shortwave listening (SWL) beginners have no problem in finding good. The length of the wire is unimportant, although the longer the better. Its easy to construct a good shortwave antenna. A longwire is, as the name implies, a stretch of wire strung between two supports: for instance, two trees or the house and a tree.
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