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Antennas : 40M : 40 meter Vertical Antennas
  • A very efficient half size 40 meter Vertical Antenna - A vertical antenna project for the 7MHz made with some spare parts. Based on a broken 20 foot fishing pole, it is based on a good ground system made with radials and a capacitive hat done to increase the global radiation resistance of the antenna. A custom loading coil is also included in this project to perfectly tune the antenna to the CW portion of the 40 meters band.
    [ Hits: 735 | Votes: 4 | Rating: 8.5 ]
Antennas : Theory
  • The Yagi Antenna - Presentation - A presentation of the Yagi Antennas, and other interesting tid-bits by Brian Mileshosky. This document explains basic concepts of Yagi-Uda antenna theory, influence of reflector and directors on global antenna gain and directivity of radio waves. A simple tape measure antenna project is also included.
    [ Hits: 535 | Votes: 2 | Rating: 7 ]
Antennas : Traps
  • Optimizing Coax-Cable Traps - A document that will guide you on Coaxial-Cable trap optimization process to gain on global antenna performance and on increasing effective bandwidth.
    [ Hits: 163 | Votes: 0 | Rating: 0 ]
Manufacturers : Cable and Connectors
  • Amphenol RF - Amphenol RF is a leading manufacturer of coaxial connectors for use in radio frequency, microwave, and data transmission system applications. Headquartered in Danbury, Connecticut, USA, Amphenol RF has global sales, marketing and manufacturing locations in North America, Asia and Europe. Standard products include RF connectors, coaxial adapters and RF cable assemblies. Custom engineered products include multi-port ganged interconnect, blindmate and hybrid mixed-signal solutions.
    [ Hits: 173 | Votes: 0 | Rating: 0 ]
Manufacturers : Microwave
  • AtlanTecRF - Equipment and Components for the RF and Microwave industry. AtlanTecRF is a global supplier of microwave and RF components and equipment to the aerospace, defence, telecommunications and scientific markets.
    [ Hits: 276 | Votes: 0 | Rating: 0 ]
Manufacturers : Morse Key
  • 9A5N Solid State CW Paddles - 21st Century telegraphy paddles, software defined telegraphy paddles by 9A5N. Following global trends in the application of the latest technology, HAM 9a5n has made a significant technological breakthrough in the field of CW paddles
    [ Hits: 472 | Votes: 1 | Rating: 10 ]
Operating Aids : Time
  • Why WWV and WWVH Still Matter - Fans of NIST signals cite benefits including understanding the near-Earth environment
    [ Hits: 166 | Votes: 3 | Rating: 10 ]
Operating Modes : APRS
  • APRS Direct - Realtime APRS tracking data - APRS Direct is a website that brings you global real-time APRS tracking and weather data (including CWOP). Our goal is to bring you a fast and easy-to-use map with the latest APRS activity.
    [ Hits: 278 | Votes: 6 | Rating: 8.5 ]
Operating Modes : GPS
  • Homebrew GPS tracker - It is easy today to build a GPS tracking system for mobile applications that can be adapted to your needs. In fact, it is more accurate to speak of a GNSS (Global Navigation Satellite System) tracker, a term which encompasses the 4 positioning systems or satellite constellations.
    [ Hits: 241 | Votes: 1 | Rating: 7 ]
Operating Modes : Meteors
  • Listening in on the Stars - Doppler Whistles from Meteor Trails, few hams know that meteors can be spotted without leaving the operating room. Identifying Meteor-Trail Reflections, Shooting Stars, Why the Meteors Whistle
    [ Hits: 72 | Votes: 1 | Rating: 10 ]
Operating Modes : Satellites
  • SatNOGS Satellites List - SatNOGS DB is an effort to create an hollistic, unified, global database for all artificial objects in space (satellites and spacecrafts). You can view and export the data, contribute to it, or even connect your application using API.
    [ Hits: 86 | Votes: 0 | Rating: 0 ]
Propagation : Observatories
  • Ionospheric total electron content - TEC - Global maps of ionospheric total electron content (TEC) used to monitor ionospheric weather, and to nowcast ionospheric storms
    [ Hits: 324 | Votes: 0 | Rating: 0 ]
  • Global Ionosphere Radio Observatory - In cooperation with the URSI Ionosonde Network Advisory Group (INAG), the LGDC promotes cooperative agreements with the ionosonde observatories of the world to accept and process real-time data of HF radio monitoring of the ionosphere, and to promote a variety of investigations that benefit from the global-scale, prompt, detailed, and accurate descriptions of the ionospheric variability.
    [ Hits: 124 | Votes: 0 | Rating: 0 ]
Propagation : Propagation Forecast
  • HF-Start WebTool - HF-START can estimate HF propagation between any given 2 points over Japan in real-time by using GNSS tomography, and can be used to forecast HF propagation 1 day in advance between any given 2 points globally by using GAIA model.
    [ Hits: 110 | Votes: 0 | Rating: 0 ]
Propagation : Solar Cycle
  • Sunspot Cycles and Human History - An article edited and published by Michael Mandeville on correlation of sunspot peaks and global events, like recessions or human conflicts. This document include solar cycle charts since Solar Cycle 1749-1751
    [ Hits: 445 | Votes: 1 | Rating: 10 ]
Radio Equipment : HF Transceivers : Icom IC-7300
  • Introduction to ICOM 7300 - In this youtube video G8GKC M0KKW and 2E0IAJ from Icom UK give a global overview of the ICOM IC-7300 HF 50 70MHz Software Defined Radio transceiver
    [ Hits: 1222 | Votes: 2 | Rating: 10 ]
Radio Equipment : Radio Equipment Reference
  • Ham Imports - Your guide to Chinese ham radios - The database of Chinese ham radios. We are here to show you that you do not need expensive kit from big brands to have fun with ham radio. With the explosion of open source designs, cheap manufacturing, and global delivery, you can now get on the bands and explore for less than ever before.
    [ Hits: 111 | Votes: 3 | Rating: 10 ]
Software : Linux : Linux Distributions
  • Skywave Linux - Linux for shortwave and amateur radio monitoring. Supports popular SDR hardware and online streaming from KiwiSDR, WebSDR, and Spyserver sites. Articles about using Linux with your SDR devices.Skywave Linux, an innovative operating system, leverages cutting-edge technology for seamless access to radio signals globally. Ideal for regions with limited internet access, it effortlessly connects to a network of SDR servers, offering high-performance SDR operation without the need for extensive hardware. With pre-installed and configured SDR software, Skywave Linux simplifies signal discovery and operation for all users.
    [ Hits: 263 | Votes: 0 | Rating: 0 ]
Software : Time
  • Meinberg NTP for Windows - Meinberg NTP software to sync your computer clock. NTP client package with IPv4 IPv6 support for Windows XP and newer.
    [ Hits: 770 | Votes: 1 | Rating: 1 ]

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