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• The Ugly MacGyver 6 meter J-pole Antenna - Essentially, a J-pole is a 1/2 wave resonant antenna connected to a quarter wave matching stub. The feedline is connected at a point on the matching stub that is at the feedline's characteristic impedance. The result is 3/4 of a wavelength on one side and 1/4 wavelength on the other side.
  [ Hits: 202 | Votes: 0 | Rating: 0 ]

• A Loft-Yagi for Six Metres - This design makes the most of having to put an aerial in the attic. This inverted-vee yagi is giving good results at GW0GHF. Directive gain is about 6 dBd. The front-to-back ratio is not brilliant, about 20 dBd.
  [ Hits: 138 | Votes: 1 | Rating: 5 ]

• The Antenna Torque Calculator - This unique online tool helps Ham Radio operators to choose the right rotator for medium and large HF antenna systems. The algorithm implemented in this calculator is the result of 40 years of experience in the HF Antenna sector. Given the Wind Speed, the total antenna square area, and the boom length, it will return the calculated torque value.
  [ Hits: 182 | Votes: 1 | Rating: 1 ]

• Morgain 40-80 by IM0JZJ - This folded dipole, can be even built for 10 and 20 meters band, and can also give good results on 15 meters, with the sole lenght of just 20 meter of total lenght. Originally born to work on 40 meters, can be adapted for any band.
  [ Hits: 1716 | Votes: 7 | Rating: 6.71 ]

• Receiving Phased Array with Small Electric or Magnetic Active Wideband Elements - Wideband receiving phased arrays with small electric or magnetic active wideband elements are discussed in details. Practical results and examples are given.
  [ Hits: 548 | Votes: 0 | Rating: 0 ]

• An Examination of the Gamma Match - A Working analysis of the gamma match problem that gives useful practical results in a article dated April 1969.
  [ Hits: 1659 | Votes: 0 | Rating: 0 ]

• Mighty Woof 2m 70cm Dual Band Fan Dipole - This article describes a unique copper pipe fan dipole that the author home made and that provides fantastic results.
  [ Hits: 564 | Votes: 6 | Rating: 7.17 ]

• Field Day Vertical Antenna by KN5L - This Field Day Vertical Antenna project is the result of many years of attending various field day sites and realizing that what was needed is a simple, easy to assemble vertical antenna. The design of this Field Day Antenna is not very novel and leverages ideas from Butternut verticals and ARRL publications. The one essential requirement was that the antenna can be raised by just one person. The design of this Field Day Antenna is an above ground mounted ground plane vertical.
  [ Hits: 214 | Votes: 3 | Rating: 7 ]

• All Asian DX Contest - All asian dx contest cw and phone rules and results of previous editions
  [ Hits: 228 | Votes: 2 | Rating: 10 ]

• PY0F Noronha Contest Group - The Noronha Contest Group is a DX and Contesting group formed by experiencied operators from Brazil with the aim to have fun and participate on the main Amateur Radio Contests & Activities. QSL info, log online and contest results
  [ Hits: 133 | Votes: 0 | Rating: 0 ]

• EME user guide by IK1UWL - A complete guide to start operating EME. In this document, that is the result of several years of experimenting, the author summarize the steps to begin on Earth-Moon-Earth communications
  [ Hits: 340 | Votes: 1 | Rating: 7 ]

• Kenwood TS-890S Sherwood HF Test Results - Receiver performance review of the Kenwood TS-890S HF,50MHz,70MHz amateur radio transceiver by Sherwood Engineering
  [ Hits: 518 | Votes: 3 | Rating: 6.67 ]

• Everything you needed to know about Radio Receivers and Scanners - Tuning into the airwaves for new and interesting transmissions has fascinated enthusiasts since the very earliest days of radio. As a result of advances in computer and radio technology, the equipment packed radio rooms of the past are now replaced by scanning receivers sometimes just the size of a mobile phone. What can radio receivers/scanners pick up? What types of radio receivers/scanners are there? What can and cannot be monitored legally? Best practice when using a radio receiver/scanner
  [ Hits: 178 | Votes: 0 | Rating: 0 ]

• EURAO Radio Amateur Insurance - The purpose of this insurance is to guarantee the pecuniary consequences of the civil liability incumbent on the insured due to consequential bodily, material and immaterial damage caused to third parties as a result of their radio amateur activities
  [ Hits: 135 | Votes: 0 | Rating: 0 ]

• Morse Code Trainer Online - An online morse code trainer application that allows to select the digits and play them at the wpm speed you desire. While decoding will evaluate the results and will indicate your proficiency level
  [ Hits: 233 | Votes: 0 | Rating: 0 ]

• Yeggi 3D printable Models for Ham Radio - Yeggi search engine results for amateur radio 3d printable models. If you are looking for 3d ham radio parts like loading coils, stands for radio, cases, antenna insulators and antenna supports here you will find many ready to use 3d models
  [ Hits: 259 | Votes: 0 | Rating: 0 ]

• UV-3R Mobilinkd - APRS in Your Pocket - An interesting combination of a Baofeng UV-3R handheld transceiver with a Mobilinkd Kiss TNC as a result of a continual improvement of the original APRS in your pocket project
  [ Hits: 737 | Votes: 3 | Rating: 5.67 ]

• 432 MHz 100W RF Power Amplifier - This article describes the construction of a 100-Watt, 70 cm amateur band linear power amplifier. It is the result of a protracted period of experimentation during which I investigated a number of final amplifier stages from obsolete UHF FM 2-way radios.
  [ Hits: 239 | Votes: 1 | Rating: 9 ]

• Coax Loss Calculator Online by K5VR - RF Feedline (Coax and Ladder-Line) Loss and ERP Calculators made with Javascript. This complex feddline loss calculator has already several line types paramenters for most common coaxial cables from Belden, Time LMR, Wireman and other common products. Result will give Matches loss, SWR loss, dB and Watts power loss.
  [ Hits: 252 | Votes: 2 | Rating: 5 ]

• Analyzing 6 handheld antennas with a VNA - In this article the author analyze six different type of VHF handheld antennas and as result of his self training on his new vector network analyzer published this interesting report
  [ Hits: 408 | Votes: 1 | Rating: 1 ]

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