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Antennas : 160M
  • Experiments with 160m antennas - Experimentin wire antennas on top band using several type of aerials. This includes a 40 to 160 meters EndFed Half Wave kite antennas and 160m/80m loaded vertical antenna.
    [ Hits: 177 | Votes: 0 | Rating: 0 ]
Antennas : Baluns
  • Easy Sleeve Balun - A simple and effective sleeve type balun is easily built. This Balun can be adapted to any band. While the dimensions are not critical ( +/- 10%), it is still basically a mono band device
    [ Hits: 180 | Votes: 3 | Rating: 6 ]
Antennas : Beverage
  • Troubleshooting Reversible Beverages - It is very worthwhile to understand how Beverages of all types work. Without that understanding it can be quite difficult to interpret what you hear and what you measure.
    [ Hits: 108 | Votes: 2 | Rating: 5.5 ]
Antennas : Portable
  • Build this Vertical Portable HF Antenna - An experimental prototype of an asymmetrical hatted vertical dipole antenna that can work on HF bands 20 to 10 meters band. The AHVD Vertical dipole is an upside-down T design
    [ Hits: 373 | Votes: 3 | Rating: 9.67 ]
Manufacturers : Interfaces
  • G3LIV Data Interfaces - UK based manufacturer of digital mode PC fully isolated interfaces. Includes several types of interfaces including USB interfaces for CW and Digital modes
    [ Hits: 226 | Votes: 1 | Rating: 7 ]
Operating Modes : Morse code : Learning Morse Code
  • Morse code practice - A comprehensive morse code auduio guide with several youtube movies classified by skill level, characters and numbers, sentences, speed level and more. All movies are linked by an interactive interface that let you select the speed and the excercise type. The page contains an downloadable set of morse code exercises and several other resources
    [ Hits: 134 | Votes: 0 | Rating: 0 ]
Operating Modes : RTTY
  • K7TTY - A website dedicated to RTTY with several articles and information on teletypes from history to operating RTTY on ham bands
    [ Hits: 99 | Votes: 2 | Rating: 5.5 ]
Radio Equipment : HF Transceivers : Yaesu FT-817
  • The KA7OEI FT-817 Battery Types - Operating the FT-817 from various types of batteries, such as Alkaline Cells, NiCd or NiMH rechargeable batteries. An useful article that compares usage of different types of batteries for the Yaesu FT-817
    [ Hits: 95 | Votes: 0 | Rating: 0 ]
Radio Equipment : Receivers
  • Everything you needed to know about Radio Receivers and Scanners - Tuning into the airwaves for new and interesting transmissions has fascinated enthusiasts since the very earliest days of radio. As a result of advances in computer and radio technology, the equipment packed radio rooms of the past are now replaced by scanning receivers sometimes just the size of a mobile phone. What can radio receivers/scanners pick up? What types of radio receivers/scanners are there? What can and cannot be monitored legally? Best practice when using a radio receiver/scanner
    [ Hits: 178 | Votes: 0 | Rating: 0 ]
Shopping and Services : Electronic Components
  • UTSOURCE.net - UTSOURCE.net is a professional purchasing B2B & B2C tools in electronic components field. UTSOURCE provides different types such as IC, Modules, RF transistors, Electronic components, passive components
    [ Hits: 97 | Votes: 0 | Rating: 0 ]
Software : Circuit Design
  • Amidon ferrite toroids calculator - Select the toroid by material type and dimension of the toroid, the desired inductance and you will get the numbers of turns
    [ Hits: 391 | Votes: 3 | Rating: 6 ]
Software : Contesting
  • Tucnak - Tucnak is multiplatform VHF/HF contest logbook. It is executable on Linux and other unix-type systems. Since v3 also native under MS Windows, Android and Kindle
    [ Hits: 136 | Votes: 1 | Rating: 10 ]
Software : Developer Resources Software : Utilities
  • Ham Cockpit - Ham Cockpit is a program of a new type. All of its functions are implemented in the plugins, the main program simply loads the plugins and helps them work together. Ham Cockpit is an integrated environment for a Radio Amateur that every user can build according to his needs. It can work as SDR client, a logger, a cluster monitor, a propagation prediction tool, or have any combination of these working together.
    [ Hits: 429 | Votes: 0 | Rating: 0 ]
Technical Reference : Amplifiers : HF Amplifiers
  • 600W LDMOS Power Amplifier - A comeplete home made 600W LDMOS RF power amplifier. Settings can be made on a 7-inch touch screen, and on this screen you can see a lot of useful information during operation, such as output power, temperature, SWR, and so on. The power amplifier includes 2 MRF300 LDMOS FETs and several built-in sensors. The amplifier also contains several types of protection functions like too high current, too high swr, too high temperature, etc.
    [ Hits: 868 | Votes: 1 | Rating: 10 ]
Technical Reference : Coax Cables and Connectors
  • Everything You Need To Know About Coaxial Cable - An technical page on coaxial cables that describes what coax cables are, how do coax cables works, what are RG cables and difference with several coax cable types, what they are used for, connector types and cable sizes
    [ Hits: 157 | Votes: 0 | Rating: 0 ]
  • N-Type Connector on Cellflex Cable - Installation of Female N-Type Connector on 1-5/8 RFS Cellflex Cable
    [ Hits: 95 | Votes: 2 | Rating: 6.5 ]
Technical Reference : Components
  • Repair or Replace Electrolytic Capacitors - For low voltage applications, like cathode bypass capacitors, most vintage types have an axial configuration, which is less common today but still available. Electrolytic power supply caps likely constitute the single worst liability in old audio, radio and test equipment. Rap about Electrolytics, Reforming, Chassis-Mount Replacements, Under-Chassis Installation, Rebuilding Capacitors
    [ Hits: 120 | Votes: 1 | Rating: 6 ]
Technical Reference : Headsets and Speakers Technical Reference : Power Supply
  • 5 Things to Know About Portable Power Stations - These pricey battery-powered devices are the only type of generator that can be used indoors safely. The article reviews pro and cons of power stations evaluating runtime, power delivery, power quality, ease of use, and noise.
    [ Hits: 170 | Votes: 0 | Rating: 0 ]

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