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323 links - and 17 categories

Antennas : End-Fed
  • The Pop-Up Vertical 2.0 - Basically, this antenna is a 23-foot wire fed through a 4:1 un-un transformer. This antenna can be easily used in portable operation, for operating all bands from 40-10 meters.
    [ Hits: 253 | Votes: 0 | Rating: 0 ]
Antennas : Feed Lines : Coax Stubs
  • Coax Stubs for 20m and 40m - When operating contest in a multi transceiver environment interferences between the 40m and 20m are guaranteed. An easy and inexpensive way to reduce interferences is to add coax stub filters
    [ Hits: 243 | Votes: 4 | Rating: 8.5 ]
Antennas : Microwave
  • Basic Microwave Antennas - Utility-Driven Tradeoff Analysis, if you want to geto on the microwave bands , you will have to choose the proper antenna for your operating conditions. How to decide is not always easy, and you may also decide to build your own antenna.
    [ Hits: 356 | Votes: 1 | Rating: 9 ]
Operating Modes : Amtor
  • Operating AMTOR - Putting one of those old modems back into use.AMTOR is an acronym for AMateur Teleprinting Over Radio and was mostly used on HF. The mode is based on the marine SITOR code that was introduced to amateur radio by Peter, G3PLX. The mode is an enhancement of RTTY with active error correction that copes reasonably well with interference and fading.
    [ Hits: 81 | Votes: 0 | Rating: 0 ]
Operating Modes : EME
  • EME user guide by IK1UWL - A complete guide to start operating EME. In this document, that is the result of several years of experimenting, the author summarize the steps to begin on Earth-Moon-Earth communications
    [ Hits: 332 | Votes: 1 | Rating: 7 ]
  • Operating EME on two meters band - 144 Mhz EME Basics, Weak Signal VHF by Tim Marek that will help you make informed decisions as how best to be proceed in constructing a EME station of your own.
    [ Hits: 95 | Votes: 1 | Rating: 9 ]
Operating Modes : Packet Radio
  • APRS and Packet Radio made easy - The Raspberry PI 3+4 has proven itself as an amateur radio computer. Both at home as the main computer in the shack but also on the road. It is small, inexpensive and incredibly versatile. The operating system and the most important programs are available for free.
    [ Hits: 144 | Votes: 0 | Rating: 0 ]
Operating Modes : QRP
  • QRP - Low Power Operating ARRL - QRP is a way of operating that involves using low power transmitters, that are no more than 5 Watts for Morse or data modes, or 10 Watts pep for voice. Introduction to QRP operations
    [ Hits: 72 | Votes: 1 | Rating: 8 ]
  • QRP is for Beginners - QRP is a Q-code originally meaning reduce power, but now has come to mean operating a radio that outputs 5 watts or less for CW or 10 watts for SSB.
    [ Hits: 113 | Votes: 2 | Rating: 9.5 ]
Propagation : Resources
  • What to Expect at Solar Minimum - Article on operating aids and band usage during solar minimun periods. Author tries to explain what can we expect on the HF bands during a solar minimum period and which approach to be used to understand band openings.
    [ Hits: 224 | Votes: 1 | Rating: 1 ]
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 ]
  • FT-817 Cheat Sheet - A simplified operating guide for the Yaesu FT-817
    [ Hits: 154 | Votes: 0 | Rating: 0 ]
Software : Awards tracking
  • Award Secretary - Program for do application and endorsement for all ARRL awards-30 awards-18 for DXCC -12 for others and 8 special querry (how long I'm waiting for QSL. You can merge several awards and endorsement in a one application and upload adif file to ARRL page by ON-LINE method. Offering optimization task for cost checking QSO.Cooperating CLUBLOG
    [ Hits: 86 | Votes: 0 | Rating: 0 ]
Software : Radio Control
  • DDUtil for Flex Radio - Data Decoder Utility is designed to enhance the operating experience for Flex Radio users by providing advanced connectivity to Peripheral equipment and radio control programs (RCPs) otherwise not available.
    [ Hits: 114 | Votes: 0 | Rating: 0 ]
Software : Utilities
  • BUREAU_ALL_QRZ_COM for Logger32 - Program cooperating with Logger32 and 4 QRZ servers with http method for personal data . Program is very quickly. Correct field QSL_VIA from QRZ , that you can put it on a QSL . Also show if present QSL Bureau for a country de sp9auv
    [ Hits: 44 | Votes: 0 | Rating: 0 ]
Technical Reference : Arduino : Morse Code
  • CW Morse Decoder for Arduino - While there are quite a few standalone Morse Code or CW decoders out there, I wanted to tackle the problem myself and end up with both a great Arduino learning project and a decent portable decoder for when I'm out in the field operating QRP
    [ Hits: 199 | Votes: 1 | Rating: 10 ]
Technical Reference : Filters
  • 20m 30m 40m Bandpass Filters - Homemade LC Bandpass Filters for 20M, 30M, 40M In multi-station environments like special events, field day, portable operating, is very important to protect receivers from excessively strong signals. Bandpass filters help to protect your transceivers.
    [ Hits: 376 | Votes: 1 | Rating: 10 ]
Technical Reference : RF Design
  • Demonstrating AM sidebands - Amateur radio courses teach that in amplitude modulation, sidebands arise. This can be proven mathematically, and nowadays with an SDR one can easily see them.
    [ Hits: 64 | Votes: 0 | Rating: 0 ]
Technical Reference : RF Safety
  • RF Exposure Calculator - To use the RF Exposure Calculator, fill-in the form with your operating power, antenna gain, and the operating frequency. Depending on how far above ground the RF source is located, you might want to consider ground reflections too.
    [ Hits: 100 | Votes: 0 | Rating: 0 ]
Technical Reference : Raspberry Pi
  • WSJT-X and Raspberry Pi - How to install WSJT-X ona a raspberry Pi and start operating with FT8
    [ Hits: 153 | Votes: 2 | Rating: 10 ]

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