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Antennas : Halo

• Halo Antenna for 50 MHz - The antenna described in this article is for 50 MHz, but the design can be scaled for any band, including VHF, UHF, or even the higher HF bands. The antenna is nothing more than a square loop of wire, approximately 30" (or ~76cm) per side. The loop is fed in the middle of one side, and the opposite side to the feed point has a gap in it.
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• W8JI Contest Station - Middle Georgia USA contesting station. Consistent record holder in 160 meter and 40 meter contests.
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• G3UES Echelford Amateur Radio Society - Echelford amateur radio society is based in ashford, middlesex, uk. has about 80 members.
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• Shoreline Amateur Radio Club - The members of the Shoreline Amateur Radio Club reside in New Haven, Middlesex, and New London Counties.
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• Middlesex Amateur Radio Society - An ARRL Special Service Club. Meets every Tuesday at Portland Senior Center, 7 Waverly Ave., Portland, CT 06480
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• The Nittany Amateur Radio Club - The club is based in State College, Centre County, Pennsylvania, the geographic center of the Commonwealth, in the middle of the Allegheny Mountains.
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• M.T.A.R.S. - The Middle Tennessee Amateur Radio Society is composed of Hams in Middle Tennessee who are dedicated to promoting Amateur Radio, providing public service communications, and having FUN doing so.
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• Meters Inc - Middle East Tennessee Emergency Radio Service
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• RSMT - Repeater Society of Middle Tennessee
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• Dickson County Amateur Radio Club - Ham Radio in Middle Tennesse
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• FM ATV repeater PI6ATS - Amateur television Repeater PI6ATS in the middle of the Netherlands. Output in 23 cm band, inputs in 13 cm and 6 cm band. All home made.
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• Radio Free Europe - Radio Free Europe / Radio Liberty is an international news and broadcast organization serving Central and Eastern Europe, the Caucasus, Central Asia, Russia, the Middle East and Balkan countries.
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• Radio 510 International - European relay station broadcasting every weekend on short-wave to all of Europe, Northern Africa and the Middle East on 13840 kHz.
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• Pizza - This program allows both great-circle (polar) and rectangular projections of the world. The great-circle map is centered on any specified latitude and longitude (the "home" location). The rectangular projection is shown with the home longitude in the middle of the screen.
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• GeoAlert-Extreme Wizard - GeoAlert-Extreme Wizard maintains updated geophysical indices and displays the information in a friendly - at a glance - manner. GeoAlert-Extreme Wizard features a Global Maximum Usable Frequency, MUF, map that creates and manages predictions from the VOACAP engine. Displayed geophysical indices include: solar wind Bz component, speed and pressure, current WWV type indices and predicted solar flux, planetary A-Index and probability of major storms at middle latitudes for the next day.
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