Posted on Wednesday, April 9, 2008 • Category: Antennas
If you have a shortwave or high-frequency receiver or scanner that is struggling to capture signals with a short, whip antenna, and you'd like the kind of performance that a 60-foot 'longwire' antenna can provide but lack the space to put one up, consider building the AA-7 HF/VHF/UHF Active Antenna described in this article. The AA-7 is a relatively simple antenna that is designed to amplify signals from 3 to 3000 MegaHertz, including three recognized ranges: 3-30Mhz high-frequency (HF) signals; 3-300Mhz very-high frequency (VHF) signals; 300-3000MHz ultra-high (UHF) frequency signals. Those bands are typically occupied by shortwave, ham, government, and commercial radio signals. Active FM Antenna Booster J-Pole Antenna FM Antenna Booster 88-108Mhz FM Preamplifier UHF-TV Preamplifier Dipole Antenna Portable Yagi for 144MHz Simple Dipole Antenna Active Antenna AA-7 HF/VHF/UHF, 3-3000MHz Build A 9 dB, 70cm, Collinear Antenna From Coax
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