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• Helically wound antenna for 40m - A helically wound vertical antenna experiment. 14 meter of wire wounded on a 8 meter fishing pole with 4 elevated radials
  [ Hits: 539 | Votes: 2 | Rating: 9 ]

• High Performance 40 Meters Vertical - 40 meter vertical antenna construction, a shortened easy-to-build vertical, with no-radials, made from surplus military camouflage poles
  [ Hits: 2234 | Votes: 2 | Rating: 8.5 ]

• Umbrella Antenna for 80 Meters - An umbrella antenna is basically just a vertical monopole antenna that is top-loaded with a large end-hat. The hat consists of a number of radial wires that slope away, downward from the top of the antenna.
  [ Hits: 926 | Votes: 0 | Rating: 0 ]

• Ground Plane Antenna Calculator - This calculator is designed to give the vertical length of a quarter-wave ground plane antenna, and the length of each of the four radials for the selected frequency you have entered
  [ Hits: 914 | Votes: 61 | Rating: 5.34 ]

• Bent Dipoles reference website - Antenna modeling discussions about What happens if... a dipole is bent horizontally, laterally, vertically. Zig-zag, meander, catenary curve. Effect of sag, elevation, radials. OCF off-center feed, harmonics. Includes 4NEC2 antenna models for each study.
  [ Hits: 710 | Votes: 0 | Rating: 0 ]

• Multiband end fed antennas - This is a 200 Watt PEP step up transformer for end fed full and half wave antennas without radials, designed as a 200 Watt PEP
  [ Hits: 2274 | Votes: 9 | Rating: 7.32 ]

• 40 m Wire 4 Square Vertical Array - 40 meter four square vertical array using four full-size 40 meter ground plane antennas, using only two radials
  [ Hits: 1069 | Votes: 2 | Rating: 9 ]

• AD5WB Vertical Antenna Installation - Pictures and description of a SteppIr vertical antenna setup in a small backyard using DX Engineering radial plates.
  [ Hits: 804 | Votes: 0 | Rating: 0 ]

• F5RDS remote antenna tuner - An home made remote antenna tuner project that with a 6 meter random wire and two radials of about the same length, can tune from 40 to 10 meters without any issue.
  [ Hits: 347 | Votes: 2 | Rating: 2 ]

• Installing Vertical HF Antenna Radials - A ground radial system for the Hustler 5BTV antenna
  [ Hits: 585 | Votes: 1 | Rating: 5 ]
• Radials on Vertical Antennas - Experimental Determination of Ground System Performance for HF Verticals
  [ Hits: 1407 | Votes: 9 | Rating: 6.67 ]
• A 40m-10m vertical antenna with elevated radials - A multiband vertical antenna for HF bands with elevated ground radials slant down at 45 degrees and acting also as guy wires.
  [ Hits: 549 | Votes: 1 | Rating: 6 ]

• The K2AV FCP Single Wire Folded CounterPoise - Efficient Low Band Counterpoise for Restricted Circumstances Loss Avoidance Opportunities and Techniques for the Low Bands The short and linear FCP was designed to reduce ground losses from inadequate radial systems beneath inverted L and other vertical antennas.
  [ Hits: 284 | Votes: 0 | Rating: 0 ]

• SkalaDesign - A danish only scale diagrams designer, usefull to draw front panels and dial scale knobs, windows freeware.
  [ Hits: 1125 | Votes: 4 | Rating: 6.75 ]

• Current Space Weather - Current Solar Wind Conditions
  [ Hits: 237 | Votes: 2 | Rating: 10 ]

• Spark - Spark is a realtime modulator software for Digital Radio Mondiale DRM, DRM+ and analog FM/AM radio standards. The software supports all code rates, bandwidths and robustness modes (A, B, C, D, E) published in the DRM standard as well as all mapping schemes, such as Standard Mapping
  [ Hits: 1909 | Votes: 5 | Rating: 7.8 ]

• iPhone DTMF Decoder - Decode DTMF from your iPhone. Hold your smartphone close to a DTMF source and this app will decode the numbers being dialled.
  [ Hits: 413 | Votes: 1 | Rating: 10 ]

• Dream DRM Receiver - Open-Source Software Implementation of a DRM (Digital Radio Mondiale) Receiver. Dream runs on virtually any pc and requires a receiver front-end to work as a real radio.
  [ Hits: 1071 | Votes: 3 | Rating: 10 ]

• Ground Radials picture gallery - A large collection of several ground radials installations
  [ Hits: 655 | Votes: 2 | Rating: 8 ]

• Programming a Baofeng UV-5R for PMR446 - Nice feature of the Baofeng UV5R family is that they support 6.25kHz tuning steps. That fact makes it possible to dial in the radio to use the exact PMR446 channel frequencies rather than a nearest fit which is the case in many other transceivers.
  [ Hits: 698 | Votes: 8 | Rating: 3.88 ]

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