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Antennas : Lindenblad
  • Build a twin-lead Lindenblad Antenna for 70cm and 2m - This document contains the detailed instructions to build a homemade lindenblad antenna using a twin-lead as dipole elements. This document contains 9 pages and includes a detailed construction sequence and some drawings to build this antenna for UHF and VHF ham radio bands
    [ Hits: 1268 | Votes: 3 | Rating: 8.67 ]
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 ]
Antennas : Theory
  • Ground Systems as a Factor in Antenna Efficiency - A classic document originally presented in Proceedings of the Institute of Radio Engineers in 1937 and is, still today, the standard referenced by the FCC, text books and many amateur radio publications.
    [ Hits: 393 | Votes: 1 | Rating: 1 ]
  • 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 ]
DX Resources : Contest : Resources
  • RTTY Contesting, A to Z - Getting started on RTTY contesting. A PDF by ED Muns, presented at CTU conterst university, about amateur radio RTTY Contesting
    [ Hits: 569 | Votes: 1 | Rating: 10 ]
Operating Modes : Digital Voice
  • Amateur Radio Digital Voice Systems - A Comparison of most popular Amateur Radio Digital Voice Systems DMR D-Star System Fusion presented by W9HPX Roland at the Charlotte Digital Radio Group in a comprehensive article about Digital Voice
    [ Hits: 457 | Votes: 0 | Rating: 0 ]
Operating Modes : Microwave
  • Amateur Radio Microwave - Introduction - Introdcution to Amateur Radio Microwave. A 21 page presentation of ham radio microwaves concepts for beginners. Frequencies, modes and activities. How to get started, what equipment is needed and some pictures of ham radio microwave station setups
    [ Hits: 407 | Votes: 0 | Rating: 0 ]
Operating Modes : NPR New Packet Radio
  • Introduction to NPR New Packet Radio - Presentation - A Quick start guide to NPR New Packet Radio on 70 cm band by the NPR author Guillaume F4HDK. This presentation introducte basic concepts of this niew digital protocol, and guide the user to the first modem configuration both of client and master modems. Includes a final recap of commands.
    [ Hits: 382 | Votes: 2 | Rating: 6 ]
Radio Equipment : HF Transceivers : Kenwood TS-890S
  • Kenwood TS-890S Sherwood HF Test Results - Receiver performance review of the Kenwood TS-890S HF,50MHz,70MHz amateur radio transceiver by Sherwood Engineering
    [ Hits: 514 | Votes: 3 | Rating: 6.67 ]
Radio Equipment : HF Transceivers : Yaesu FT-450
  • Yaesu FT-450D Review - Yaesu FT-450D HF / 6 Meter DSP Transceiver, a nice affordable transceiver for amateur radio use, but understand the caveats.
    [ Hits: 227 | Votes: 1 | Rating: 9 ]
Radio Equipment : VHF-UHF Handhelds : TYT MD-2017
  • TYT MD-2017 Review - The TYT MD-2017 dual band VHF & UHF DMR portable radio review
    [ Hits: 116 | Votes: 0 | Rating: 0 ]
Radio Equipment : VHF-UHF Mobile Radio Equipment : VHF-UHF Mobile : ICOM IC-2100H
  • Programming Icom IC-2100H - Six Steps for Programming your IC-2100H from the front panel of radio. Using these steps you should have no trouble entering either simplex or repeater frequencies and saving them.
    [ Hits: 320 | Votes: 1 | Rating: 3 ]
Radio Equipment : VHF-UHF Mobile : ICOM IC-2720H
  • Icom IC-2720H One Page Operating Guide - An operating guide for the com IC-2720H VHF/UHF Radio, includes Turning the power On or Off, Selecting the Output Power, Activating Memory Mode, Operating in Memory Mode
    [ Hits: 405 | Votes: 0 | Rating: 0 ]
Software : Linux
  • Linux and Amateur Radio - Presentation - A PDF presentation about Amateur Radio and Linux by By: Dave Mamanakis. A beginners guide to Linux for radio amateurs, this presentation cover basic concepts of the open source operative system, from the basic installation to the setup of ham radio programs.
    [ Hits: 1196 | Votes: 0 | Rating: 0 ]
Technical Reference : Amplifiers : VHF Amplifiers 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: 1283 | Votes: 4 | Rating: 7.75 ]
Technical Reference : Headsets and Speakers
  • Headsets Reviews and Observations - A selection of speakers or headphones for use with amateur radio equipment. Includes an interesting paragraph comparing Dynamic and Electret Condenser Microphones, but also about audio Equalization.
    [ Hits: 522 | Votes: 0 | Rating: 0 ]
Technical Reference : Homebrew
  • Homebrew Spectrum Analyzer - Project for DXers and experimenters alike. An old article publishes by 73 Amateur Radio magazine in PDF format, where all the components required to build your own HF spectrum analyzer may be found in a well-stocked junk box.
    [ Hits: 770 | 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 ]

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