antenna 12 m

antenna 12 m

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• 6m and 4m Vertical Dipole Antenna - The two dipoles are parallel with a distance of 12 cm and are also fed in parallel. The total length of the 4 m dipole is 208 cm and the 6 m dipole is 280 cm.
  [ Hits: 319 | Votes: 6 | Rating: 8.17 ]

• 6 Elements Yagi Antenna on 50 MHz - This is a design based on the QuickYagi 4 software by WA7RAI with some changes for practical reasons. The beam uses 6.5 metres of standard 25mm square boom, 12mm diameter elements without tapers. The actual boom length used is 6.3 metres and all parts are readily available.
  [ Hits: 134 | Votes: 2 | Rating: 6 ]

• Build your own HF balun - A balun is a MUST for dipoles or similar antennas when they are feed with coaxial cable. From the RF point of view, the shield can be modeled as two conductors, the internal shield (the real shield, this is, ground) and the external shield, who is really far to be ground. In this way, your dipole has 3 arms, the two from the dipole and the coaxial cable shield (external face)
  [ Hits: 248 | Votes: 1 | Rating: 10 ]
• BalUn for Delta-loop & Quad-loop antennas - This Guide helps you to build the 1:2 BalUn 600 Watts DIY kit step by step. If a delta-loop or quad-loop antenna is powered with a coax cable from the transceiver it is necessary to use a 1:2 BalUn. This 1:2 BalUn uses a symmetrical 1:2 impedance transformer.
  [ Hits: 286 | Votes: 1 | Rating: 9 ]

• End-Fed antenna for 17 and 12 meters - Article about an end-fed anntenna for the 17 and 12 WARC Bands. 30 meters is not included in this project. This antenna includes a 14 windings unun impedance transformer using a FT-140-43 ferrite toroid, that should be enought for a 100W PEP.
  [ Hits: 541 | Votes: 3 | Rating: 4.33 ]

• Fan Dipoles 10/15/20m and 12/17/30m - How to build Fan-Dipoles by DK7ZB. Experiences with various band combinations. Not all combinations are working properly. If the frequencies are to close together the impedances will lead to a very bad SWR. This happens with the bands 10-12-15m or 15-17-20m.
  [ Hits: 488 | Votes: 2 | Rating: 9.5 ]

• Choosing right material to make antennas - Why build antennas out of copper and not aluminum or stainless steel. Selecting the best metals for antennas evaluating the conductivity factor.
  [ Hits: 336 | Votes: 2 | Rating: 5.5 ]

• Testing Dipole vs Indoor Magnetic Loop Antenna - Testing performances of indoor antenna. A comparison of a magnetic loop antenna vs a classic wire dipole done using wsprlite on 30 meters band.
  [ Hits: 856 | Votes: 2 | Rating: 5.5 ]

• Homemade Magnetic loops antennas by F5RDS - Basic magnetic loop antenna examples and loop aerials theory explained. This article inclued some interesting tricks on building magnetic loop antennas and an usefull excell sheet to help compute magneti loop antennas calculating power efficiency from 10 to 40 meters band
  [ Hits: 257 | Votes: 0 | Rating: 0 ]

• Build the PAC-12 Antenna - A multi-band portable vertical antenna can be built with relatively ordinary components obtained from the local hardware store, including replaceable loading coils
  [ Hits: 1046 | Votes: 2 | Rating: 6.5 ]
• PAC-12 Antenna modification - A Multiband Slinky Coil for the PAC-12 portable Antenna, can be used also as a dual PAC-12 dipole by James Bennett
  [ Hits: 267 | Votes: 2 | Rating: 10 ]

• EME Dish Antenna Project - A 3.2m EME dish project that provides a better performance on 1296 MHz (10+dB sun noise vs. 6dB with my 432 array) and an even better performance on 2304 MHz
  [ Hits: 346 | Votes: 0 | Rating: 0 ]
• A Moxon Antenna for Satellites - How to make a dual-band VHF/UHF handheld Moxon Antenna to work satellites
  [ Hits: 438 | Votes: 4 | Rating: 7.25 ]

• VHF-UHF Long Boom Very High Performance Antenna Designs - Experimental Long Boom Antennas - CP, LPDA, multiband with several NEC Files for 50MHz 144MHz 222 MHz 432MHz but also 902MHz and 1296 MHz Antenna projects. Includes also for each antenna model, in a general comparison table each antenna characteristics including Directive Gain, G/T, E-F/R, H-F/R abd Boom Length. This is a great value comparison table of several commercial and home made VHF UHF antenna projects.
  [ Hits: 189 | Votes: 1 | Rating: 10 ]
• Modifications to the Diamond V2000 and similar antennas - This kind of antenna has grown in popularity over the last years because it gives you a decent performance and triband capabilities. But its 50 MHz design is far from optimal. Here you can learn how to improve its 50 MHz performance in a very easy way.
  [ Hits: 631 | Votes: 2 | Rating: 9.5 ]

• Revisiting the Rybakov 806 Vertical Antenna - An article about the Rybakov 806 Vertical antenna. The classic Rybakov configuration is a 7.6m or 8m ( aprox 25 or 26 feet) wire fed through a 4:1 UNUN
  [ Hits: 456 | Votes: 4 | Rating: 5.75 ]

• 3 Element Yagi Antennas for 144 MHz SSB-CW - A great and efficient monoband VHF portable antenna. The article consist of two version of a 12.5 Ohm 3 elements yagi beam antenna plans for the two meter band, a full sized and a shortened version expecially designed for the SSB and CW on 144 MHz.
  [ Hits: 427 | Votes: 4 | Rating: 8 ]

• Ameritron RCS-10 Review - Review of the Ameritron 8 Antenna Remote Coax Switch with SO-239 connectors on 120V
  [ Hits: 146 | Votes: 4 | Rating: 7.25 ]

• Cushcraft R8 Vertical Project - 40/30/20/17/15/12/10/6 Meters antenna setup and assembly with high res pictures of the R-8 Antenna
  [ Hits: 279 | Votes: 0 | Rating: 0 ]

• Automatic HF Antenna Tuner with Arduino - Make and automatic antenna tuner based on Arduino and using economic card. This ATU Project can be installed outdoors and controlled remotely by an rs485 link
  [ Hits: 569 | Votes: 3 | Rating: 9.67 ]

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