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Antennas : 40M : 40 meter Vertical Antennas

  • 40m Vertical End-Fed Antenna - A quarter wave vertical end-fed antenna for the 40 meters band. As all vertical antennas, also this aerial requires a good earthing system. In this project the ground is composed by twelve 4, wires buried in the lawn by using a spade to create a slit to drop the wire into.
    [ Hits: 2684 | Votes: 7 | Rating: 5.43 ]
Antennas : Theory : Impedance matching
  • The Gamma Match - The gamma match was originally invented as a means of feeding vertical monopole antennas for medium wave broadcasts, which were earthed at the base for lightning protection- Hams are more likely to use a gamma match to feed a dipole or loop element, but the basic theory is easier to understand for the case of a quarter wave monopole.
    [ Hits: 953 | Votes: 2 | Rating: 4.5 ]
DX Resources : Contest : Contest Results
  • Unearthing VHF Contest Secrets: An In-Depth Analysis - In this article, authors delve into the inner workings of the IARU R1 VHF contest, the world's largest 2m contest. While activity levels are declining, the top performers consistently maintain their results. Authors explore the physical constraints of achieving higher point totals and speculate on various factors like improved technical capabilities, increased interference, and evolving station setups. It is a fascinating journey into the contest's dynamics, leaving room for intriguing speculations about its future.
    [ Hits: 69 | Votes: 2 | Rating: 10 ]
DX Resources : DX Maps
  • ADIF to KML converter - This freeware application for Linux and windows, allows you to convert an ADIF file to a KML file so you can map your QSOs easily and open it with google maps, or google earth or any application supporting the KML format
    [ Hits: 203 | Votes: 0 | Rating: 0 ]
DX Resources : Log Analysis
  • ADIF Processor Map QSOs with Google Earth - The ADIF Processor is an online application that visualizes amateur radio contacts from an ADIF log file using Google Earth. SOTA CSV log files can also be used. As well as allowing you to view and explore your contacts in Google Earth, you will be able to see a Markdown or text table of contacts, use the output ADIF file which contains QRZ.com data, accurate contact distances and fields populated from comments in the input file. Print QSL labels. One of the benefits of using the ADIF Processor before uploading/storing your ADIF file is detecting errors in callsigns and activity references (e.g. POTA or SOTA references).
    [ Hits: 390 | Votes: 3 | Rating: 7 ]
Ham Radio : Demographics
  • Mapping the Australian Radio Landscape - Discover a comprehensive solution for mapping Australian ham radio entities using data from the ACMA Public Register. This tool, developed in Delphi 7, generates KML files for Google Earth, showcasing repeaters, beacons, and operators across different prefixes. While respecting privacy regulations, the files provide valuable insights into the amateur radio landscape.
    [ Hits: 39 | Votes: 0 | Rating: 0 ]
Operating Modes : APRS
  • Google Maps APRS - APRS web map with weather, telemetry, messaging and a bulletin board. Google Maps and Google Earth views update automatically in real time. 14 languages.
    [ Hits: 920 | Votes: 14 | Rating: 7.42 ]
Operating Modes : EME
  • EME user guide by IK1UWL - A complete guide to start operating EME. In this document, that is the result of several years of experimenting, the author summarize the steps to begin on Earth-Moon-Earth communications
    [ Hits: 330 | Votes: 1 | Rating: 7 ]
Operating Modes : Mobile : Motorcycle
  • BikeCam G1OCN Dave - Live streaming video from G1OCN's motorcycle mobile webcam while he occasionaly drives his motor bike around the South coast of England, with google earth tracking map, APRS callsign G1OCN-10.
    [ Hits: 492 | Votes: 1 | Rating: 10 ]
Propagation : Propagation Forecast
  • Cloud RF - Web VHF/UHF planning - Web based VHF-UHF RF planning powered by SPLAT! and Google Maps. Access via website, Android App or dynamic Google Earth interface.
    [ Hits: 1301 | Votes: 19 | Rating: 7.67 ]
Propagation : Resources
  • Google Earth 4-D Inonosphere - Free real-time Earth Space 4-D global 4-D ionosphere using Google Earth, by CAPS/ES4D Gateway
    [ Hits: 811 | Votes: 5 | Rating: 7.4 ]
  • Propagation on 630 Meters and 2200 Meters - This is a theoretical look at propagation on 630-Meters and 2200-Meters using ray tracing software. It expands on the brief discussion in the ARRL Handbooks. The Earth's magnetic field affects 630-Meter and 2200-Meter band propagation. Lower ionization reduces absorption, aiding low-frequency propagation. Differences exist between bands, limited daytime sky-wave propagation. Sunrise/sunset show promise, yet mechanisms are unclear. Ducting possible at night in specific conditions. Negative ions enhance propagation. Inefficient antennas and high man-made noise are anticipated. Groundwave propagation is significant on 2200-Meters.
    [ Hits: 32 | Votes: 1 | Rating: 10 ]
Software : Developer Resources
  • QSO Map Pyton Script - This project is a python program used to plot the location of QSOs (radio contacts) on Google Earth or other mapping applications. It reads an ADI file of the QSOs and creates a KML file
    [ Hits: 107 | Votes: 0 | Rating: 0 ]
Software : Grid Bearing and Maps
  • GridMapper WG7J - Upload an ADIF fiel and plot all worked grids in an online map. Support filtering by band, year and can export the output directly into a google map, or a google earth KML file
    [ Hits: 361 | Votes: 6 | Rating: 6.83 ]
  • Google Earth Grid Square Locator - This page host a simple Windows program that will create an overlay for Google Earth that displays the Maidenhead grid. If you only need 4-character locator coverage, you can download an alternative ready-to-use kmz-file.
    [ Hits: 825 | Votes: 6 | Rating: 4.17 ]
Software : Log Analysis
  • ADIF to Map Amateur Ham Radio Contacts by K2DSL - This web application will read in a ham radio ADIF file produced by many logging programs and map contacts on a Google map. This simple tool converts also the log file into a KML file that can be easily downloaded and imported into Google Earth for a tridimensional view of your QSOs.
    [ Hits: 3644 | Votes: 9 | Rating: 8.55 ]
Software : RF Coverage Mapping
  • Keyhole Radio for Google earth - The ultimate Keyhole Markup Language (KML) plugin for Google earth. Keyhole Radio is a unique and powerful RF planning interface, accessed by loading a Keyhole Markup Language (KML) overlay in Google earth.
    [ Hits: 1973 | Votes: 8 | Rating: 5.88 ]
Technical Reference : Grounding
  • Grounding HF Transceiver using Coax Cable - Improper grounding or earthing system can cause several unwanted RF interferences (RFI) to television sets, broadcast receivers, hi-fi sets and telephone sets. In this Article the author explain how to setup a proper radio shack grounding using coaxial cable and ceramic disc capacitor
    [ Hits: 1281 | Votes: 4 | Rating: 7.75 ]

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