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342 links - and 3 categories

Antennas : Antenna Calculators
  • The Antenna Torque Calculator - This unique online tool helps Ham Radio operators to choose the right rotator for medium and large HF antenna systems. The algorithm implemented in this calculator is the result of 40 years of experience in the HF Antenna sector. Given the Wind Speed, the total antenna square area, and the boom length, it will return the calculated torque value.
    [ Hits: 178 | Votes: 1 | Rating: 1 ]
Antennas : End-Fed : End Fed Half Wave Antenna
  • The End-Fed Half-Wave Antenna - Presentation - A very well done presentation about End-Fed Half-Wave antennas. This PDF document contains a summary of experiences in how to build custom EFHW antennas. Includes an interesting comparison table of UnUn configurations with recommended toroids, Wire size, turns and capacitors. An useful recap on common errors in building homebrew EFHW Ununs completes the document.
    [ Hits: 406 | Votes: 3 | Rating: 8.67 ]
DX Resources : Callsigns
  • Table of Call Signs - ITU - The official table of international Call Sign series published at the ITU Website
    [ Hits: 264 | Votes: 2 | Rating: 3 ]
DX Resources : Contest : Contest Stations
  • PY0F Noronha Contest Group - The Noronha Contest Group is a DX and Contesting group formed by experiencied operators from Brazil with the aim to have fun and participate on the main Amateur Radio Contests & Activities. QSL info, log online and contest results
    [ Hits: 130 | Votes: 0 | Rating: 0 ]
Ham Radio : Clubs : Europe
  • EURAO - European Radio Amateurs Organization - Meeting point of radio amateurs associations from around the world where introduce and share their activities and experiences. It is about giving voice to all those independent radio clubs of any country interested in exchanging knowledge with the others.
    [ Hits: 156 | Votes: 0 | Rating: 0 ]
Manufacturers : Transceivers
  • XieGu Tech - XieGu Tech manufactures quality amateur radio transceivers and amplifiers designed by BG8HT. Xiegu focus is portable and self contained transceivers perfect for your next SOTA, hiking trip or travel experience.
    [ Hits: 344 | Votes: 0 | Rating: 0 ]
Operating Modes : NPR New Packet Radio
  • New Paket Radio: Hamnet over 70cm by EA4GPZ - An introduction to NPR by Daniel Estevez. In this blog article Daniel EA4GPZ / M0HXM, introduce the new IP communication protocol over the 70 cm amateur radio band. Daniel is an experienced operator on IP on 430 MHz with CC1101 and Beaglebone black project and makes a good comparison of the two projects.
    [ Hits: 237 | Votes: 0 | Rating: 0 ]
Operating Modes : VHF UHF
  • The VHF/UHF DX Book - Free to download PDF book about operating The VHF/UHF bands written in the early to mid-1990s by a team of experienced VHF/UHF DXers and equipment developers, in an effort to pass on their knowledge and stimulate further developments.
    [ Hits: 229 | Votes: 1 | Rating: 10 ]
Radio Equipment : HF Transceivers : ICOM IC-756
  • Icom IC-756PROIII - Icom UK Discontinued products - A page dedicated tho the IC-756PROIII transceiver. This radio, discontinued, incorporates many of the features that made its predecessors so successful. However, the integration of the latest technology employed in the IC-7800 such as receiver technology, +30dBm class IP3, miniscope makes this new rig the very pinnacle of the IC-756PRO series.
    [ Hits: 161 | Votes: 1 | Rating: 9 ]
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 : VHF-UHF Handhelds : Baofeng UV-3R
  • Baofeng Mic Pin Out and Programming Cable Schematics - Speaker Microphone Pin Out, Dual PTT Switching,Programming Cables, SMA Antenna Connection, Extended Antenna Threads for Baofeng UV 3, UV 5 Series handheld transceivers
    [ Hits: 1071 | Votes: 8 | Rating: 8.75 ]
Radio Equipment : VHF-UHF Handhelds : Baofeng UV-5R Software : Macintosh
  • xCAT xDAX for macOSX and FlexRadio 6000 - xCAT is an helper application for the FlexRadio 6000 series running on macOS computers to control via CAT protocol tranceivers, while xDAX purpose is to provide a way for Digital Mode Software like Fldigi, WSJT-X to access the digital audio data (DAX) of the FlexRadioTM
    [ Hits: 194 | Votes: 0 | Rating: 0 ]
Technical Reference : Batteries
  • Batteries for portable use - Batteries for portable radio operation are always an interesting subject for discussion. Review of some LiPo (Lithium-ion polymer ) batteries for amateur radio use.
    [ Hits: 248 | Votes: 0 | Rating: 0 ]
Technical Reference : Ham Radio Go Kits
  • KX3 GoBox 2012 - This KX3 go-box weights 1,6 kg including the components and the KX3 with its ATU and filter-option installed (no internal batteries) and a light-weight headset
    [ Hits: 210 | Votes: 3 | Rating: 6 ]
Technical Reference : Power Supply
  • Solar power in a Can - This is a great project to learn about the basics of electronics, batteries, and renewable energy. The finished project can charge a phone or tablet, light up a camp-site, and provide for whatever other small electric needs you have.
    [ Hits: 220 | Votes: 0 | Rating: 0 ]
Technical Reference : Programming Radio
  • Programming Chinese Radios - A practical guide to program Chinese Radios like Baofeng UB and BF series hanheld trnsceivers
    [ Hits: 351 | Votes: 0 | Rating: 0 ]
  • How to program Motorola APX P25 - How to program Motorola APX Series P25 Two-Way Radios for use with the OpenSPOT 2. This document covers some important steps to be followed to upload the correct codeplug to mMtorola P25 radios
    [ Hits: 269 | Votes: 2 | Rating: 5.5 ]
Technical Reference : Spectrum Analyzers
  • Tektronix Compatible Tracking Generator - A spectrum analyzer is always an usefull amateur radio test equipment that should be present in a radio shack. Hams can use it for testing frequency response of filters, amplifiers, and other two-port RF devices. This article illustrate a tracking generator compatible with any spectrum analyzer in the Tektronix 490- and 2750-series lineups
    [ Hits: 188 | Votes: 0 | Rating: 0 ]
Technical Reference : Test Equipment
  • An Experimental Q Meter - The article describes Q factor, methods of measuring Q factor, inductance and capacity using a Q meter and the design of an experimental Q meter unit. The Q factor or quality factor of an inductance is commonly expressed as the ratio of its series reactance to its series resistance.
    [ Hits: 234 | Votes: 0 | Rating: 0 ]

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