3 element

3 element

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• 2-Element-Yagis for shortwave - 2-Element parasitic Yagis for the Shortwave-Bands 10m-30m
  [ Hits: 6016 | Votes: 21 | Rating: 4.7 ]
• Quad antenna for 10 and 15 Meters - Building guide for a two element quad antenna planned for 28 and 21 Megahertz
  [ Hits: 5789 | Votes: 5 | Rating: 6.6 ]

• 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 ]
• 3 Element Yagis Antennas for HF  ^{updated  pop} - All these plans use the DK7ZB match
  [ Hits: 27603 | Votes: 69 | Rating: 4.94 ]

• QM5 Yagi for 2 meters band - The QM5 antenna is a simple 5 elements Yagi with 1.88 m boom length for the lower 144 MHz SSB/MGM band, I used it mainly for Sporadic-E and MS contacts. It exhibits a forward gain of 9.17 dBd; i.e. 11.3 dB forward gain over the isotropic radiator, while the F/R is about 11.5 dB. Elements
  [ Hits: 6869 | Votes: 4 | Rating: 5.25 ]
• QM7 7 elements 144 MHz Yagi-Uda Antenna - The QM7 antenna is a simple 7 elements Yagi with 3.70 m boom length for the lower 144 MHz SSB/MGM band, used it mainly for Sporadic-E and MS contacts. It exhibits a forward gain of 11.35 dBd; i.e. 13.5 dB forward gain over the isotropic radiator, while the F/R is about 12.5 dB
  [ Hits: 5361 | Votes: 15 | Rating: 5.27 ]
• A portable 2-element VHF yagi  ^pop - Build a portable VHF yagi antenna for 2 meters. All you need is two rabbit ear antennas from Radio Shack, two CATV baluns, four feet of 3/4 CPVC pipe with one tee.
  [ Hits: 28668 | Votes: 26 | Rating: 7.23 ]
• Stacked 7-Element-2m-Yagis - These yagis and groups were designed with YO7.23 from K6STI and checked with EZNEC from W7EL. With a gain of 14/17/20dBd they have a good relation between gain and mechanical problems.
  [ Hits: 3899 | Votes: 6 | Rating: 4.67 ]
• 13 elements Yagi antenna for 144 MHz - DJ9BV yagi antenna for 2 meters band
  [ Hits: 8897 | Votes: 36 | Rating: 6 ]

• 6 Meter 3 Element Quad - Starting from an original project for a 2 element quad antenna for six meter band, ve7ca presents the dimensions for a 3 element version.
  [ Hits: 9573 | Votes: 18 | Rating: 4.95 ]

• Hairpin match for the 5 elements Tonna for 6 meter - How to improve the gain of your 5 element Tonna yagi for 50 MHz by roughly 3 db!
  [ Hits: 2435 | Votes: 6 | Rating: 6 ]

• 432 Mhz 8 Element Quagi Antenna - How to build a 432 Mhz Quagi, using a wood-made boom, and gives a 13 DBI Gain
  [ Hits: 14173 | Votes: 43 | Rating: 7.84 ]

• WW2Y/K2WI Beverage design - Ideas for enhanced beverage antenna performance, Single wire beverage improvements and arrays of two beverages. This article explores improving reception with Beverage antennas. It discusses single wire Beverages and their limitations. Then it compares two array configurations: broadside and end-fire. Broadside offers better front-to-side ratio but requires more space. End-fire offers better front-to-back ratio and takes less space but is trickier to implement for multiple bands. The article concludes with a 3-element end-fire design for excellent performance and explores possibilities for dual-band configurations.
  [ Hits: 4056 | Votes: 4 | Rating: 9.5 ]

• 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: 14910 | Votes: 14 | Rating: 5.79 ]

• A tri-band 2 element portable Yagi - HF Wire Yagi antenna with notes and eznec file on original article of a Portable 3-Band Yagi antenna for 10-15-20 meter band made with wire elements. Include link the original to QST article.
  [ Hits: 15051 | Votes: 4 | Rating: 7 ]

• QRZ de W3DF The Quad Project - A two element multiband quad antenna
  [ Hits: 2349 | Votes: 14 | Rating: 9.06 ]

• Quagi Designer - Quagi antenna design, this little windows application let you calculate dimensions of elements and spacing of a quagi antenna. Freeware by VE3SQB
  [ Hits: 5669 | Votes: 24 | Rating: 4.91 ]

• A two element yagi beam - Simple gain antennas for the beginner, a 2 element HF yagi antenna
  [ Hits: 4817 | Votes: 9 | Rating: 5.78 ]

• Satellite tracking with GPS - The program calculates the actual position of the satellites using the NORAD 2LINE-element set, which is available via the Internet, for nearly all satellites. The position is then displayed in 3D-view as well as in 2D (mercator) view, where the footprints are also be shown.
  [ Hits: 2921 | Votes: 7 | Rating: 5.43 ]

• A low pass filter circuit - A simple 7 element, Chebyshev low pass filter, rolls of at 30MHz. Attenuation is better than -40dB at 60MHz, -65dB at 90MHz, -80dB at 120MHz.
  [ Hits: 5303 | Votes: 21 | Rating: 6.1 ]

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