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• 7 Element Yagi Calculator - Online javascript antenna calculator designed to give the critical information of a particular beam antenna, in this case a seven element Yagi, for the frequency chosen.
  [ Hits: 3462 | Votes: 57 | Rating: 6.72 ]
• 3 Element Yagi Calculator - This calculator is designed to give the critical information of a particular beam antenna, in this case a three element Yagi, for the frequency chosen.
  [ Hits: 437 | Votes: 5 | Rating: 5.6 ]

• An introduction to the air cored coil - We use the term air core coil to describe an inductor that does not depend upon a ferromagnetic material to achieve its specified inductance. This covers the cases where there really is just air inside as well as windings upon a different insulator such as bakelite, glass or PTFE etc. Do you need an air coil?
  [ Hits: 106 | Votes: 1 | Rating: 2 ]

• Folded dipole antennas: terminated vs un-terminated - As the name suggests, it is simply a dipole with the tips folded towards each other. In this case, a full-wave dipole. The span of a standard folded dipole is aprox 0,5 lambda. In this article the author investigate on differences between un-terminated vs terminated folded dipole antennas.
  [ Hits: 494 | Votes: 9 | Rating: 6.78 ]

• A simple NonDirectional Antenna for 10 meter - This article is about a simple vertical end-fed-half-wave wire antenna for 10 meters that can be used in case of restricted space.
  [ Hits: 702 | Votes: 2 | Rating: 7 ]

• RF Choke with Bifilar Windings - This article presents an RF Choke featuring an 11-bifilar turn winding of #14 house wire on a Fair-rite FT240-31 toroid. The choke is enclosed in a 3D-printed case from Thingiverse, though this may pose thermal concerns at higher power levels. With SWR concerns up to 30MHz, the author plans to employ two series chokes at the rig input for improved performance. This choke offers versatility for portable use, with potential mismatch resolution using an antenna tuner. Further testing is anticipated upon the arrival of new cables.
  [ Hits: 86 | Votes: 0 | Rating: 0 ]

• Magnetic Loop Controller for 4 Antennas - This project is for those ham amateurs who do not have a commercial one . It's easy to build with a soldering iron, a plastic case and a little knowledge of arduino. The controller is made with budget components you can find easily in Internet. The main component is a cnc shield that fits over an Arduino Uno. Both made a compact, small and cheap controller.
  [ Hits: 133 | Votes: 2 | Rating: 10 ]

• Portable T-Match ATU - Homebrew Portable T-Match ATU, VK1AD Portable T-Match Antenna Tuner (ATU) mounted in a plastic case, T-Match ATU Schematic – 3.5 to 52 MHz power rating 80 watts
  [ Hits: 103 | Votes: 1 | Rating: 8 ]

• DX Pedition Audio Recordings - A collection of audio recordings of some DX Peditions used as case studies to evaluate dxspedition operatios behaviour and calling stations. These audio files are excerpts from real pileups recorded directly off the air in MP3 format
  [ Hits: 173 | Votes: 0 | Rating: 0 ]

• History of The Amateur radio LOCATOR System - This article taken from the IARU Region 1 VHF handbook, is about the history of the original Locator System named QRA-Locator consisted of just five-character code, two capital letters, a two-digit number and a lower-case letter, like inf example CM72j
  [ Hits: 192 | Votes: 1 | Rating: 1 ]

• Thunderstorms Causing Sporadic E - A Case For Thunderstorms Causing Sporadic E on 6 Meters. In Propagation and Radio Science, Eric Nichols explains one possible mechanism is thunderstorms that are strong enough to break electrons free forming a cloud of free electrons.
  [ Hits: 82 | Votes: 0 | Rating: 0 ]

• HLA 300 Amplifier Review - In this survey some practical experiences were written down, that might become handy in case you are contemplating purchasing such an amplifier.
  [ Hits: 149 | Votes: 1 | Rating: 9 ]

• IC705 GoBox: A Portable Windows-Based Solution for All-Digital Modes - This project details the creation of a portable GoBox housing an IC705, Windows 11 PC, and Bluetooth microphone. The robust setup, enclosed in a weatherproof Hofbauer Explorer Case, ensures stability and functionality for QRP and emergency radio activities. The aluminum-mounted devices minimize RF interference, and a built-in LifePO4 battery powers the 10.1 TFT touch LED monitor, providing approximately 12 hours of use in receive mode. With a focus on grab-and-go versatility, this GoBox stands as an efficient solution for outdoor ham radio operations.
  [ Hits: 96 | Votes: 0 | Rating: 0 ]

• AutoEZ - Automated use of EZNEC. AutoEZ is an Excel application that works in conjunction with the EZNEC antenna modeling programs and allows you to use variables to control diverse aspects of the model. You can then run multiple EZNEC test cases while AutoEZ automatically changes one or more variables between runs. Commercial version and free demo available for download.
  [ Hits: 515 | Votes: 1 | Rating: 7 ]

• remoteAudio - audio streaming application - remoteAudio is an multi platform Audio streaming application for Amateur Radio purposes. The most typical use case for this software is the remote operation of an amateur radio station. remoteAudio supports multiple users and multiple audio sources. At any time multiple clients can listen simultaneously on the same radio, although remoteAudio only allows one user to transmit.
  [ Hits: 531 | Votes: 2 | Rating: 5.5 ]

• 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 ]

• Ham Radio EMCOMM Go Kit - An article about building home made Go Kits also using Tac-Comm tactical radio carriers
  [ Hits: 260 | Votes: 0 | Rating: 0 ]
• Yaesu FT-891 Go-Box for POTA - This article documents the author's latest go-box build for outdoor ham radio operations using a Yaesu FT-891 transceiver. The go-box is constructed from a plastic "50-cal ammo case" and contains various components, including the transceiver, LDG Z11 Pro autotuner, DIY Yaesu FH-2 remote control keypad, and an external battery. The author details the design considerations, the mounting of components inside the box, and addresses issues related to ventilation and cable management. The go-box is geared for CW operations and POTA activations, with further modifications planned for a microphone and DATA jack. This project allows for rugged, environmentally protected outdoor radio operations while maintaining portability.
  [ Hits: 196 | Votes: 0 | Rating: 0 ]

• BX-184 Voice Keyer - The BX-184 is a voice keyer developed by Olli DH8BQA designed to fit into the case of a Yaesu MH-31 microphone.
  [ Hits: 237 | Votes: 0 | Rating: 0 ]

• Mains Filter for EMC & Noise Reduction - This article shows how to make a mains filter that can be extremely effective in reducing and in some cases eliminating completely EMC from the electricity supplying your shack
  [ Hits: 308 | Votes: 3 | Rating: 3.67 ]

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