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Antennas : 20M : 20 meter Dipole Antennas
  • 20m mini dipole antenna - This antenna project is a compact center-loaded wire-dipole. Center-loading is the most efficient way of loading a dipole or mono-pole
    [ Hits: 1961 | Votes: 4 | Rating: 9.75 ]
Antennas : 20M : 20 meter Yagi antennas
  • 2 element yagi wire beam - A 2 element yagi wire-beam antenna for the 20 meter band based on the KJ5VW design
    [ Hits: 1853 | Votes: 7 | Rating: 3 ]
Antennas : 80M
  • 80m Vertical Antenna with Folded CounterPoise - A very efficient 80 meter Counterpoise antenna designed to reduce ground losses from inadequate radial systems beneath inverted L antennas, a project by DM2GM and DM4IM based on the original K2AV antenna concept.
    [ Hits: 1088 | Votes: 2 | Rating: 7 ]
Antennas : Baluns
  • Baluns in antenna systems - Understanding Baluns. This article explores some simple antenna system configurations and the effect of key system components, connections and dimensions on feed line common mode current.
    [ Hits: 1106 | Votes: 2 | Rating: 2.5 ]
Antennas : Feed Lines
  • Common mode currents - Common mode currents can flow in all sorts of systems, not just antenna feed lines. This article explain how Common mode noise can be isolated from the desired signal
    [ Hits: 316 | Votes: 1 | Rating: 8 ]
Manufacturers : Antenna Parts
  • Mastrant - Synthetic guy ropes and accessories for antenna support systems
    [ Hits: 525 | Votes: 9 | Rating: 8.77 ]
Manufacturers : Antennas : Marine
  • Scan Antenna - Scan Antenna supply precision antennas to some of the world’s most advanced, market leading companies. Their antennas fit in satellite voice/data, mobile/wireless GSM, GPS, marine/land based radio and other specialty systems.
    [ Hits: 290 | Votes: 0 | Rating: 0 ]
Manufacturers : Broadcasting Equipment
  • Elenos - ELENOS is the leader company for fm transmitters, amplifiers, radio broadcast equipment and custom systems.
    [ Hits: 394 | Votes: 0 | Rating: 0 ]
Manufacturers : Military
  • Nutaq - Leader in supplying digital signal processing (DSP) boards, systems, design services and OEM products for the Wireless, Scientific and Defense markets.
    [ Hits: 267 | Votes: 0 | Rating: 0 ]
Operating Modes : Repeaters : Repeater maps
  • RFinder Worldwide Repeater Directory - The only worldwide amateur radio repeater directory. Supports Android, iPhone, web, RT Systems, CHIRP GPS enabled. AvMap, Garmin, TomTom
    [ Hits: 703 | Votes: 3 | Rating: 4 ]
Operating Modes : Top Band
  • Working 160M From a Small Lot - A 109 pages presentation in PDF File by Jim Brown K9YC on techniques in operatint the top band from a small lot.
    [ Hits: 687 | Votes: 4 | Rating: 9.75 ]
Radio Equipment : VHF-UHF Handhelds : Icom ID-51A Software : Macintosh
  • QRQ CW trainer - qrq is an open source Morse telegraphy trainer which runs on several operating systems (Linux, Unix, OS X and Windows), similar to the classic DOS version of Rufz by DL4MM.
    [ Hits: 1579 | Votes: 1 | Rating: 1 ]
Software : Radio Programming
  • FTM-400 Radio Software - The ADMS-M400 software allows you to program memory channels and menu settings of the Yaesu FTM-400 radio
    [ Hits: 1362 | Votes: 30 | Rating: 4.3 ]
Software : iPhone
  • ACARS Decoder App - ACARS decoder app for the iPad, iPhone, and iPad Touch
    [ Hits: 703 | Votes: 2 | Rating: 7 ]
  • iPad iPhone HF Weather Fax Decoder App - HF Weather Fax lets you receive marine weather radiofascimile transmissions on your iPad, iPhone and iPod Touch. Just connect it to a shortwave radio tune in a weather fax frequency, and watch the images come in.
    [ Hits: 1738 | Votes: 2 | Rating: 4.5 ]
Technical Reference : Grounding
  • House ground layouts - Hams or amateur radio operators and CB operators usually cannot have ideal grounds, but with some care and planning they can have nearly perfect systems
    [ Hits: 607 | Votes: 0 | Rating: 0 ]
Technical Reference : Headsets and Speakers
  • Anatomy of a Loudspeaker - There are a number of important technical issues relating to the matching of speakers to amplifiers, and to the wiring of multiple speaker systems
    [ Hits: 429 | Votes: 0 | Rating: 0 ]
Technical Reference : Software Defined Radio : RTLSDR
  • Coherent Receiver - N-channel scalable coherent receiver that employs the RTL-SDR technology in order to create inexpensive multi-channel receiving systems.
    [ Hits: 307 | Votes: 0 | Rating: 0 ]
  • RTL-SDR - Yahoo Group - Discussion group about RTLSDR Dongles, software support and hardware mods for these Software Defined Radio systems based on RTL2832U
    [ Hits: 410 | Votes: 2 | Rating: 9 ]

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