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353 links - and 7 categories

Antennas : 6M
  • Omni-directional Antenna for 50 MHz - This simple project, based on the orginal CobWebb-Antenna model, is about an horizontally polarized, omi-directional antenna for the six meter band.
    [ Hits: 542 | Votes: 2 | Rating: 7 ]
Antennas : EH
  • DL7AHW Spraycan EH Antennas - Hairspray-can EH Antennas for shortwave and online programs. Small magnetic (H) antennas (Loops) have a good efficiency for the upper bands (20/15/10 meter band) and also in contrast to E-antenna a defined radiation direction.
    [ Hits: 310 | Votes: 2 | Rating: 8.5 ]
Antennas : Longwave
  • 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: 266 | Votes: 2 | Rating: 9.5 ]
Antennas : Magnetic Loop
  • Magnetic Loop for the 2m band - Such kind of omnidirectional antenna gives the possibility to be QRV with horizontal polarisation, as commonly used for the CW and SSB section of the 2m band. This actual design shows a 1.3:1 bandwidth of about 150kHz, centered to 144.200MHz.
    [ Hits: 572 | Votes: 1 | Rating: 10 ]
Antennas : Quad
  • Designing VHF/UHF Quad Antenna - The information in this article has come from many amateur sources, the most notable was from WA6TEY (sk 1985) Ray Frost, who was a pioneer of VHF Quad designs and one of the best Southern California Transmitter Hunters. Ray built hundreds two meter quads in single and paired configurations as well as his famous mobile radio direction finding quad.
    [ Hits: 961 | Votes: 7 | Rating: 8 ]
DX Resources : Clusters
  • IZ3MEZ Web DX Cluster for Ham Radio - WEB DX Cluster for HAM radio, connected and accessible 24/24 hours a day. This DX cluster server is maintained by IZ3MEZ. Direct connection with telent protocol is possible, follow the instructions for configuration.
    [ Hits: 295 | Votes: 5 | Rating: 10 ]
DX Resources : IOTA
  • Islands on the Air - IOTA - The official IOTA web site, designed by the IOTA IT Team to meet the specific needs of those participating in the IOTA programme includes IOTA directory, IOTA spots and all the IOTA programme information.
    [ Hits: 165 | Votes: 0 | Rating: 0 ]
Internet and Radio : Sounds
  • DX Pedition Audio Recordings - A collection of audio recordings of some DX Peditions used as case studies to evaluate dxspedition operatios behaviour and calling stations. These audio files are excerpts from real pileups recorded directly off the air in MP3 format
    [ Hits: 173 | Votes: 0 | Rating: 0 ]
Manufacturers : Antenna Analyzers
  • HG7AN Antenna Analyzer - Antenna Analyzer plus 500 is a multifunctional measuring instrument, very useful for amateur radio activity. Its size allows you to easily take it for relocation as well. Frequency range: 100KHz - 500MHz. Access directly via WiFi. Includes a dual-channel signal generator
    [ Hits: 264 | Votes: 1 | 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 : Navtex
  • NAVTEX by National Weather Service Marine Forecasts - NAVTEX is an international automated medium frequency (518 kHz) direct-printing service for delivery of navigational and meteorological warnings and forecasts, as well as urgent marine safety information to ships.
    [ Hits: 367 | Votes: 0 | Rating: 0 ]
Operating Modes : Radio Direction Finding
  • ARDF Sprints and Fox-oring - About Amateur Radio Direction Finding events, sprint and Fox-Oring spcialities. Sprints are intended to bring ARDF nearer to the public and to attract potential sponsors and new athletes to ARDF. Foxoring encourages ARDF enthusiasts to improve their orienteering skills.
    [ Hits: 116 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF Transceivers : Yaesu FT-817
  • Using the FT-817 with the RM K300P RF AMP - Direct experience of portable operations of the FT-817 transceiver by Yaesu and the small power amplifier by RM Italy with 300W output
    [ Hits: 329 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF Transceivers : Yaesu FTDX101
  • Yaesu FTDX101 - Official Yaesu.com - The Official page of the FTDX101 on the Yaesu.com website, includes full description, PDF brochures, official english manuals, complete accessories list and direct link to Yaesu software download for this radio
    [ Hits: 198 | Votes: 2 | Rating: 5.5 ]
Radio Equipment : Reviews and Comparisons 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 ]
Software : Radio Control
  • JaRec - Java Radio Remote Control Software - JaRec is a multi-platform Java application which can be used to control your own CAT enabled transceiver (with support for audio) using a Serial/USB Serial/Bluetooth or network connection. jAReC can act as both a server and as a client. The PocketRxTx Android application can be used as a client securely to connect over the network and control (CAT) your radio transceiver remotely via jAReC server over the Internet or local LAN, with bi-directional audio support.
    [ Hits: 1735 | Votes: 12 | Rating: 7.31 ]
Technical Reference : Components : Toroids
  • Choosing the correct Ferrite - Common mode currents are those currents that flow in the same direction on a wire bundle, as opposed to the currents that flow
    [ Hits: 250 | Votes: 0 | Rating: 0 ]
Technical Reference : Radio Direction Finding
  • RDF with Raspberry PI and RTL-SDR - The RasHAWK team has used a Raspberry Pi as the basis for a networked RF sensor capable of supporting spectrum monitoring, signal intercept and direction finding (DF) operations.
    [ Hits: 880 | Votes: 3 | Rating: 9 ]
Technical Reference : Sound Card Radio Interfacing
  • Connect you MacOS to CAT Serial Port - How to connect an Apple MacOS to a USB Radio transceiver. Get a Mac driver for ICOM IC-7100, IC-7200, IC-7300, IC-7600, IC-7610, IC-7850, IC-9100, PCR2500, Kenwood TS-890S, TS-990S, TS-590S, Elecraft KX3, K3S, Yaesu FTdx3000, FT-891, FT-991 or Ten-Tec Eagle USB direct connect built in USB/Serial adapter.
    [ Hits: 228 | Votes: 0 | Rating: 0 ]

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