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• Modeling an 80/40/20M Fan Dipole for DX - An interesting presentation of a real multiband Fan Dipole antenna, optimized for better DX operation performances, considering the terrain, position, DX destination path and other influencing factors
  [ Hits: 538 | Votes: 2 | Rating: 5.5 ]

• 5 element wire Yagi antenna for 20 m - A 5 element wide spaced yagi for the 20m long path to Europe was installed at ZL6QH, the antenna is fed with a 600 ohm open wire feed line.
  [ Hits: 1174 | Votes: 0 | Rating: 0 ]

• Aircraft Scatter ACS - Getting started with Aircraft scatter, defined as the process of scatter radio waves of the body of a traveling aircraft in order to enhance the distance possible to bridge on VHF, UHF and microwaves. The ACS path, Equipment requirement and Operating techniques
  [ Hits: 55 | Votes: 0 | Rating: 0 ]

• How To Get Started On EME - Moonbounce is the ultimate long path DX. It is exciting and allows you to literally work the world on VHF and UHF. It is not as difficult as you may think. Here is how to get started on this most exciting mode
  [ Hits: 455 | Votes: 2 | Rating: 5 ]

• Radio Wave Transmission Paths - Radio transmission is affected by the presence of the earth. Also, the upper atmosphere of the earth is a rarefied, ionized, conducting region that influences transmission considerably. Undertanding Wave Diffraction, Wave Refraction and Absorption
  [ Hits: 110 | Votes: 1 | Rating: 9 ]

• Radio Signal Path Loss - Article about the essentials of radio signal path loss, its causes and prediction, and its use in radio coverage and wireless survey tools
  [ Hits: 188 | Votes: 0 | Rating: 0 ]
• VHF APRS Propagation Map - VHF – Based on realtime APRS reports. This map shows real-time radio propagation from stations operated near 144 MHz. It uses data gathered by Automatic Packet Reporting System-Internet Service (APRS-IS) from packet stations in the amateur radio service. The map shows activity from the past hour. Paths are smoothed to create a color-coded footprint indicating the distance VHF signals are likely to be traveling.
  [ Hits: 315 | Votes: 0 | Rating: 0 ]

• Howell Communications, Inc. - Family owned and operated tower service company. Tower installation, Microwave and Broadcast Antenna Installation, Installation of Feed Lines, Ice Bridge Installation, Lightning Protection, Site Inspections, Alignment of Microwave Paths, Flash Testing, Sweep Testing, Tower Lighting and Relamping.
  [ Hits: 530 | Votes: 0 | Rating: 0 ]

• Shortwave.am - Shortwave Schedules - Shortwave Radio Schedules from Eibi/AOKI combined lists. Includes Google maps showing beam directions and long paths.
  [ Hits: 1657 | Votes: 2 | Rating: 3 ]

• AirScout - Software for Aircraft Scatter Prediction. Extend your capabilities on VHF-/UHF-SHF bands even when you live in an unprivileged location and Calculate a propagation path between two stations and follow the aircrafts in real time
  [ Hits: 298 | Votes: 2 | Rating: 5.5 ]

• WSPR - WSPR implements a protocol designed for probing potential propagation paths with low-power transmissions. Stations with internet access can automatically upload their reception reports to a central db
  [ Hits: 1730 | Votes: 3 | Rating: 9.33 ]

• TAP Software - RF Path design software, tower coverage mapping software to evaluate radio transmitter sites, predict and simulate radio coverage, plan land mobile radio or cellular systems. Commercial RF coverage mapping software by Softwright llc.
  [ Hits: 2620 | Votes: 5 | Rating: 6.8 ]
• HeyWhatsThat Path - HeyWhatsThat Path Profiler is an online useful tool to do a Line of Sight calculation between yourself and the another station
  [ Hits: 2856 | Votes: 6 | Rating: 7 ]

• HERALD P2P radio link design - Sw tool to design point-to-point multi-hop microwave links and networks, 400MHz to 58 GHz. Site/Hop Configuration; Customized Antenna & Radio Equipment Libraries; Link Budget; Path Profile Analysis ,clearance, reflections; import path profiles from SRTM maps, free download.
  [ Hits: 577 | Votes: 5 | Rating: 6.8 ]

• Arduino QRP Transceiver: DIY Success on HF Bands - This article introduces an Arduino-based QRP CW Transceiver designed for lower HF bands. The journey begins with the Wotduino, evolving from a keyer to a multi-mode beacon. The development includes a QRP transmitter and culminates in a receiver inspired by Roy Lewallen design. The transceiver, controlled through a control bus features a signal path, modulation, filtering, and adjustable frequency settings. Despite initial testing intentions, successful QSOs on 80 and 40 meters showcase its functional capabilities.
  [ Hits: 108 | Votes: 1 | Rating: 1 ]

• Beacon for 23 cm band - This is a 30-watt sea level beacon intended for the coastal path between Northern and Southern California
  [ Hits: 419 | Votes: 0 | Rating: 0 ]

• Ground Systems - Basic ground system functions, lightning and safety ground, RF return-path ground and induced ground currents
  [ Hits: 1110 | Votes: 1 | Rating: 9 ]

• PC to RTX interface - Interface with galvanic isolated audio and digital paths. For ICOM IC-706, IC-718, IC-746 and IC-756 HF transceivers, the next one suits modern KENWOOD HF RIGs and the third is a simple "PSK-31" interface.
  [ Hits: 1705 | Votes: 3 | Rating: 5.33 ]

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