hf antennas

hf antennas

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• Short Monoband Dipole Antennas - KGD Antennas - The KGD antenna is an option for those with space restrictions. The idea behing this project is to provide a short dipole antenna for HF Bands and to allow operations on HF bands when its not possible to setup large antennas, using these short base loaded dipoles.
  [ Hits: 240 | Votes: 0 | Rating: 0 ]

• Wire Antenna Design Lengths - The Classic Numbers for All Types of Wire Antennas at HF. Wire antennas need to be made a bit long and cut to resonance. They are affected by height above the ground and surrounding objects. In order to get an idea of the right place to start, certain formulas are generally accepted.
  [ Hits: 330 | Votes: 1 | Rating: 7 ]

• Exploring The J-Pole Antenna - The J-Pole antenna is a common omnidirectional antenna used in amateur radio, particularly on the VHF and UHF bands. This article is an attempt to explore how the J-pole antenna transforms feed-line impedance to free-space impedance, all the while providing gain found only in the more expensive commercial products.
  [ Hits: 143 | Votes: 0 | Rating: 0 ]

• Backyard Multi-Band Wire HF Antennas - My Top Five Backyard Multi-Band Wire HF Antennas. A selection of the top 5 HF wire antennas for the backyard and for multi-band operation
  [ Hits: 793 | Votes: 3 | Rating: 8 ]

• Portable wire antennas - This document describe serveral wire antennas, from the folded dipole, to the common halfwave monoband antenna for those who want to make HF portable operations in holiday.
  [ Hits: 845 | Votes: 2 | Rating: 1 ]

• HF Skeleton Slot Antennas - HF Skeleton Slot An antenna system with a difference.
  [ Hits: 353 | Votes: 2 | Rating: 10 ]

• Practical Antenna Modeling with 4NEC2 - Presentation about Practical Antenna Modeling Using the NEC Codes with examples of HF wire antennas and 4NEC2. How to define and edit the models, Running the simulations, Work some examples, Variables usage, Deal with Feed Lines and ground
  [ Hits: 481 | Votes: 0 | Rating: 0 ]

• The Easy Way Antenna Systems - This document is a must read for anyone considering building a good low cost HF multi-band antenna system. The author combine in this document four important ingredients to produce simple but effective antenna system, like antennas of non resonant length, line attenuation, the transmatch and the balun
  [ Hits: 632 | Votes: 2 | Rating: 4.5 ]

• Tuning Antenna Traps - The problem with making your own trapped HF antennas is usually getting the coaxial traps tuned to frequency. This article explains a method using a RF signal generator at +10dBm output into the coaxial trap.
  [ Hits: 276 | Votes: 2 | Rating: 6.5 ]

• Z-Match 100 and mini Z-Match - This is a antenna tuner with wide range tuning for antennas with a Z of + 50 Ohms on all the HF bands.
  [ Hits: 298 | Votes: 0 | Rating: 0 ]

• Dual Band VHF UHF Yagi Antenna projects - On this page are designs for Dual Band 2M / 70cm antennas. All antennas are 50 ohm designed driver. These Yagis have a unique element called a Open Sleeve. 4 Element 5 element and 9 element Dual Band - 2M / 70cm antenna projects
  [ Hits: 753 | Votes: 4 | Rating: 5.75 ]
• ZigZag Antenna - VHF/UHF unconventional antennas - An unconventional antenna family, the VHF/UHF Zigzag Dipole Antennas. Design, theory and practical construction, transformation and balancing with a half wave balun.
  [ Hits: 746 | Votes: 2 | Rating: 8.5 ]
• 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: 190 | Votes: 1 | Rating: 10 ]

• Verticals - About vertical antennas - Experiments on vertical antennas for HF bands.
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• Homebrew 5/8 Wave HF Vertical Antennas - The advantage of 5/8 wave antenna is that it has the lowest angle of radiation and has about 1dB more gain when compared to 1/4 and 1/2 verticals. So the 5/8 should be the favourite choice for DX.
  [ Hits: 714 | Votes: 2 | Rating: 8 ]

• HF Wire Antennas for Field Day - Dipole antennas, vertical half-wave dipole antennas with impedence tranformes that can be used for portable operations. Some well worn antenna configurations are the easiest and loudest lash-ups you can try.
  [ Hits: 220 | Votes: 0 | Rating: 0 ]

• 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 ]

• Aerial 51 - Aerial 51 is an antenna manufacturer producing HF Wire antennas. Their antenna product catalog includes portable, OCF wire antennas for HF bands but also QRP transceivers, and accessories for portable operations.Based in Germany
  [ Hits: 426 | Votes: 0 | Rating: 0 ]

• HamGPS - Display your current Maidenhead locator with 10 digit precision. It also computes bearing and distance to a set of target locations using locator or latitude / longitude. Useful to align antennas in VHF / UHF / microwave DX activities. No network or fancy maps usage, so it can be used even in remote locations.
  [ Hits: 383 | Votes: 1 | Rating: 7 ]

• miniVNA PRO Modifications - The mini Radio Solutions miniVNA PRO is the only affordable vector network analyser (VNA) I know of that offers remote wireless operation. This is very interesting because it allows to measure the input impedance of HF antennas installed at height without having to deal with coax cable lengths, baluns nor common mode suppression chokes. However, to render the miniVNA PRO truly field proof, it requires a number of significant modifications.
  [ Hits: 136 | Votes: 5 | Rating: 7.8 ]

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