band

band

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• Dismantable Yagi for the bands 10-17m - 10-12-15-17 meter band yagi antenna
  [ Hits: 5861 | Votes: 6 | Rating: 9.17 ]

• 2-Element-Yagis for HF  ^pop - 2-Element parasitic Yagis for the Shortwave-Bands 10-12-15-17-20-30m. The antennas are feeded with the DK7ZB-match. A quarter-wave choke of coax is grounded at the socket.
  [ Hits: 50051 | Votes: 146 | Rating: 7.08 ]

• 2m VHF antennas with high gain - 2m SSB/CW-12.5 Ohm Yagis with extrem high gain and small bandwidth. These Yagis were constructed as ultra-light, portable Yagis with extrem high gain. They have small bandwidth and are working from 144,0-144,8MHz with good SWR.
  [ Hits: 8262 | Votes: 12 | Rating: 7.75 ]

• 40-80 Half-Extended Double Zepp Antenna - A dual-bander for 80M and 40m. An Extended Double Zepp (EDZ) is a 5/4 wavelength center-fed dipole. This article will introduce the Half-Extended Double Zepp (HEDZ) which has characteristics that a lot of amateur radio operators should find quite interesting
  [ Hits: 11400 | Votes: 9 | Rating: 4.44 ]

• Trapped dipole for 40-80-160 meters  ^pop - Build a space efficient trapped dipole antenna for 40-80-160 meter bands using RG-58 and PVC pipe by W8NX
  [ Hits: 96971 | Votes: 119 | Rating: 6.24 ]

• 70MHz-Yagis - Various Yagi antennas for 70 Mhz band
  [ Hits: 5232 | Votes: 18 | Rating: 7.28 ]

• A Six element yagi antenna for the 50 MHz - Christoph petermann's df9cy six element yagi antenna for six meter band
  [ Hits: 1773 | Votes: 4 | Rating: 8 ]

• A Full Wave Loop for 80 - 10 Metres - VE3HCR article of a home made loop antenna for 80 meters band
  [ Hits: 4477 | Votes: 2 | Rating: 6 ]

• Echelon-Log Beverages - About beverage antennas, Enhanced F/B Beverages, Bandwidth of Directivity, arrays. This article describes two phasing systems for Beverage antennas that improve directivity and cancel rearward signals. These systems use lossy elements and require minimal components to achieve broadband performance.
  [ Hits: 1860 | Votes: 1 | Rating: 10 ]

• Small Multiband IEK Antenna - A multi band version of the EH antenna by Emilio S. Campus IS0IEK
  [ Hits: 2576 | Votes: 2 | Rating: 9 ]

• G5RV Antenna Homebrew - Homebrew G5RV a simple multiband antenna. This article shows detailed pictures of a G5RV home made antenna, including antenna size and dimensions by 9M2ZAK
  [ Hits: 1587 | Votes: 4 | Rating: 7.25 ]

• J-Pole antennas for 2m-40m - A multiband jpole antenna
  [ Hits: 15314 | Votes: 12 | Rating: 6.5 ]

• 2-Element-DK7ZB-Quad for 5 Bands - 10-12-15-17-20m A description was in the German Ham-Magazine "Funkamateur" in Issue 11/2003
  [ Hits: 14911 | Votes: 14 | Rating: 5.79 ]

• AMANDX Dipole - The longwire antenna is a very effective antenna for the listener who wants to cover all of the shortwave bands from 530 KHZ to 30 MHZ.a
  [ Hits: 3984 | Votes: 4 | Rating: 9.75 ]

• Stacking for 50MHz - Summary of discussion on stacking antennas on six meter band
  [ Hits: 1181 | Votes: 1 | Rating: 10 ]

• DK7ZB 144 mhz Yagis - High gain, good pattern and acceptable bandwidth. These aims can be realized with a radiation-resistance of 25-35Ohms, because the 28-Ohm-feedpoint is very simple to match.
  [ Hits: 1908 | Votes: 7 | Rating: 6.86 ]
• Copper Cactus Single Coax Feed - Single Coax Feed to Multi-Band Copper Cactus Antenna.
  [ Hits: 1325 | Votes: 1 | Rating: 10 ]

• Wire-Beam - Wire beam antenna for the bands 6m, 10m, 12m, 15m, 17m and 20m
  [ Hits: 2035 | Votes: 2 | Rating: 9.5 ]

• Near-Real-Time F2-Layer Critical Frequency Map - This map can be used to determine the frequencies that will always be returned to the Earth. Transmitted frequencies higher than the indicated contours (which are given in MHz) may penetrate the ionosphere, resulting in lost power to space. The map shows the radio auroral zones as green bands near the northern and southern poles.
  [ Hits: 5270 | Votes: 24 | Rating: 4.84 ]

• SB220 SB221 arcing problems improvements mods - This article explores the claim an amplifier might arc from a parasitic oscillation, damaging capacitors, bandswitches, or other components.
  [ Hits: 1309 | Votes: 2 | Rating: 10 ]

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