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• Delta Loop DX Antenna for 40 meters band - A monoband delta loop antenna for the 7 MHz. This vertically polarized DX Antenna is a full wavelength sngle side antenna and has a total length of 42.3 meters (137,1 inch) Can be easily setup with a flag pole or fishing pole as center top mast. For optimal performance lower side should be at 2 meter above the ground. This antenna offers a low radiation angle and 1 DB Gain.
  [ Hits: 433 | Votes: 3 | Rating: 6.33 ]

• J-POLE for 50MHz by IZ0UPS - The J Pole antenna is a good omnidirectional antenna that can be used for portable or fixed station usage. It does not need a ground, and neither complex feed systems. It can be homemade with simple material and in several ways.Article in Italian
  [ Hits: 245 | Votes: 2 | Rating: 10 ]

• Top Loaded Vertical Antenna for 80 Meters Band - Top Loaded Vertical Antenna 3,5 MHz 80m and a 14 MHz Trap for the 20m band. The weight of this portable vertical antenna is less than 1 kg, including the ground network. The weight of the telescopic fiberglass fishing rod is another 1kg. The rod expands from 1.5 meters to 8 meters.
  [ Hits: 268 | Votes: 0 | Rating: 0 ]

• Notes on Designing LF-MF antennas - A free book on designign LF MF antennas. The six chapters in the body of the book are limited to basic information which, combined with a little modeling or simple calculations, can be applied directly using graphs for special problems like inductor design.
  [ Hits: 267 | Votes: 2 | Rating: 9.5 ]

• A Ground Plane Antenna for NOAA Weather Stations - An introduction to antennad including a DIY assembly instruction for a A Ground Plane Antenna for NOAA Weather Stations
  [ Hits: 2191 | Votes: 12 | Rating: 6.67 ]

• Ground plane for 144, 222 and 440 MHz - Here we have a ground plane antenna mostly used for 144, 222, 440 Mhz. Its one of the simplest antennas to make. New hams can build this with little to no experience in antenna building.
  [ Hits: 1263 | Votes: 10 | Rating: 5.7 ]

• The 10/15/20 Meter Trap Vertical Antenna - This antenna project came out very nice. It's a rugged homebrew multi-band trap vertical antenna that works the 10, 15, and 20 meter amateur radio bands. The antenna can be mounted on the ground or on a mast. Mounted on the ground the antenna has a low take off angle for working DX. If mounted on a mast the antenna will acheive both a low angle as well as another radiation lobe that has a much higher take off angle.
  [ Hits: 4176 | Votes: 14 | Rating: 6.08 ]
• 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 ]

• High Altitude Ballooning, From The Ground Up (and back again) - High Altitude Ballooning makes for a challenging project that sometimes turns into an engrossing hobby. Whilst it is not rocket science it does encompass a wide range of fields (sometimes literally) and there is a lot to learn before you send your first flight up into the sky.
  [ Hits: 136 | Votes: 1 | Rating: 10 ]

• How to receive NOAA Satellite images with SDR Radio - Guide for the reception of NOAA satellite images using software defined radio on Windows or MacOS
  [ Hits: 314 | Votes: 5 | Rating: 4.6 ]

• Double Cross Satellite Antenna - An easy to build antenna for ground reception of NOAA weather or amateur satellite signals. Double cross antenna by Gerald Martes
  [ Hits: 3077 | Votes: 15 | Rating: 4.74 ]

• Weak Signals - Reduce volume to reduce noise - This article discusses how volume reduction can help in the reception of weak signals by reducing the noise level. It is commonly known that reducing the volume also reduces the background noise, and especially in the reception of weak digital signals it can be beneficial
  [ Hits: 229 | Votes: 1 | Rating: 10 ]

• How to use Baofeng UV-B5 flash light switch for LCD background light - Baofeng UV-B5 LCD background light is turned on only when some keys are pressed and stays on far a very short time. This article explains how to use flash switch which is used in UV-B6 version but in UV-B5 has no function.
  [ Hits: 292 | Votes: 1 | Rating: 10 ]

• Build your own ADS-B Ground Station - You can now build and run your own ADS-B ground station that can be installed anywhere and receive real-time data directly from airplanes on your computer
  [ Hits: 843 | Votes: 2 | Rating: 10 ]

• Five Antennas Switch Box - A project of a 5 Antennas Relay Switch Box, all Switches & Relays have both contacts wired in parallel to improve reliability of operation, to prevent static build up, when an antenna is not in use the feeder coax is grounded.
  [ Hits: 1249 | Votes: 1 | Rating: 10 ]

• Grounding and Reducing Noise - Reducing noise and RF in your radio station by grounding your equipment in the proper way. PDF article by Xtal Staff.
  [ Hits: 1297 | Votes: 1 | Rating: 10 ]
• Home Made Artificial Ground Tuner - Home made Artificial Ground. This article contains a schematics of a custom artificial ground device that can be used to ground your station equipment if you live in an higher floor and cannot effort a proper dedicated ground connection. This Artificial Ground has been designed by Colyn Baillie-Searle GD4EIRP
  [ Hits: 587 | Votes: 0 | Rating: 0 ]

• Noise Canceller Project - This project was intended to accompany the stealth antenna project. Author want to see how effective a noise canceller could be in reducing the background noise floor when attic / stealth antennas are being used.
  [ Hits: 709 | Votes: 0 | Rating: 0 ]

• SNR Signal to Noise Ratio - Signal-to-noise ratio is defined as the ratio between the desired signal, and the background noise. In this article, SNR is explained in the deep
  [ Hits: 357 | Votes: 2 | Rating: 2.5 ]

• Locating Power Line Noise - RF interference from power lines is caused by arcing as high voltage electricity bridges a gap to a lower ground potential on the power pole. Corroded or loose connections, cracked insulators almost all of the hardware on a power pole can be the source of arcing.
  [ Hits: 427 | Votes: 0 | Rating: 0 ]

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