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Antennas : 40M : 40 meter Dipole Antennas
  • Ham radio 40-meter dipole: your first antenna - How to home made a custom home made dipole antenna for the 40 meters band, just 66 feet long. Enjoy the band openings during the evening and play morse code or digital modes on this magic band.
    [ Hits: 198 | Votes: 0 | Rating: 0 ]
Antennas : Theory
  • Practical Antenna Modeling with 4NEC2 - Presentation about Practical Antenna Modeling Using the NEC Codes with examples of HF wire antennas and 4NEC2. How to define and edit the models, Running the simulations, Work some examples, Variables usage, Deal with Feed Lines and ground
    [ Hits: 473 | Votes: 0 | Rating: 0 ]
Operating Aids : Grid Squares
  • History of The Amateur radio LOCATOR System  updated - This article taken from the IARU Region 1 VHF handbook, is about the history of the original Locator System named QRA-Locator consisted of just five-character code, two capital letters, a two-digit number and a lower-case letter, like inf example CM72j
    [ Hits: 191 | Votes: 1 | Rating: 1 ]
Operating Modes : DMR
  • Guide to DMR Code Plugs - Basic information on code plugs. What code plugs is, how to set up a code plug, transmit talk groups and configuring zones.
    [ Hits: 178 | Votes: 1 | Rating: 10 ]
Operating Modes : Digital Voice
  • FreeDV - Digital Voice for HF bands - FreeDV uses an audio codec as a software based modem to decode and encode the voice and text data from your computer. The data is encoded and then is transmitted over the HF radio using AF signals that can then in turn be decoded by the receiving station.
    [ Hits: 91 | Votes: 0 | Rating: 0 ]
Operating Modes : Morse code : Learning Morse Code
  • Learn Morse Code as a language - A review of the most popular and traditional methods to learn morse conde and a different method that foreseen to learn 100 most common words in CW
    [ Hits: 157 | Votes: 0 | Rating: 0 ]
Operating Modes : Morse code : Morse operating guides
  • Keys to Good Code - Article appeared on 73 amateur radio today in 1999 on how to unlock the secrets of sending precise Morse Code. Article contains hints on how use the stright key and the sideswiper key, but even the electronic keyers or the semiautomatic keys.
    [ Hits: 334 | Votes: 1 | Rating: 9 ]
  • ITU International Morse Code Recommendation - Recommendation M.1677-1 (10/2009), General transmission rules, Morse code, signals, spacing and length of the signals.
    [ Hits: 101 | Votes: 0 | Rating: 0 ]
Operating Modes : QRP
  • 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 ]
Operating Modes : Satellites : CubeSats Propagation : Resources
  • VHF APRS Propagation Map - VHF – Based on realtime APRS reports. This map shows real-time radio propagation from stations operated near 144 MHz. It uses data gathered by Automatic Packet Reporting System-Internet Service (APRS-IS) from packet stations in the amateur radio service. The map shows activity from the past hour. Paths are smoothed to create a color-coded footprint indicating the distance VHF signals are likely to be traveling.
    [ Hits: 308 | Votes: 0 | Rating: 0 ]
Software : Radio Programming
  • DMR Contact Manager - DMR Contact Manager is a Free software package designed to make it easy to maintain channel, zone, contact and call group information in these radios. It is fully compatible with the Ham-Digital and RadioID database systems and allows instant codeplug updates from a wide variety of sources. DMR Contact Manager is designed for use with Connect Systems CS700/CS701/CS750/CS800/CS801/CS800D radios, as well as the Tytera MD-380/390/390GPS, TYT MD2017/MD9600, AnyTone AT-D868UV and AT-D858, Retevis RT3, and similar radios that use the RDT/RDB file formats.
    [ Hits: 352 | Votes: 2 | Rating: 9 ]
Software : Time
  • GPS time - GPSTime is a small freeware applet that corrects your PC clock using GPS. GPSTime reads the serial data coming out of your GPS receiver and decodes the $GPRMC messages to determine the precise UTC time. Works on Windows Vista/7/8/10 with PC with serial ports.
    [ Hits: 636 | Votes: 0 | Rating: 0 ]
Software : Weather and FAX
  • METEOR M decoder - A portable decoder for METEOR M weather satellite LRPT signal, available for windows and Linux
    [ Hits: 386 | Votes: 0 | Rating: 0 ]
Technical Reference : Arduino
  • Arduino Nano and si5351 Digital VFO/BFO - A kit Digital VFO with pre-soldered surface mount parts and burned-in firmware, a scratch build with Arduino Nano, C code with modifications, and a Silicon Labs si5351 PLL clock generator on a breakout board.
    [ Hits: 369 | Votes: 2 | Rating: 6 ]
Technical Reference : Arduino : Morse Code
  • CW Trainer - Arduino Project - Hone your Morse code skills with this entry-level project. Article includes the full schematic of the CW Trainer, describes the sketch and how to operate the morse code trainer.
    [ Hits: 601 | Votes: 0 | Rating: 0 ]
  • Teaching Arduino to Copy Morse Code - Teach Arduino to copy Morse Code. This project will produce a sketch that can actually copy the code that you send with your key, and additionally it will automatically adjust itself to your sending speed.
    [ Hits: 85 | Votes: 0 | Rating: 0 ]
  • Decoding hand-sent Morse Code with Arduino - Two easy to build microcontroller projects for machine recognition of hand-sent morse code
    [ Hits: 161 | Votes: 1 | Rating: 8 ]
Technical Reference : Morse Code Decoder
  • PIC CW Decoder - CW decoder using a PIC microcontroller. This is a morse code decoder made using a PIC(16F88) microcontroller, this project supports displays with multiple controller chips
    [ Hits: 167 | Votes: 0 | Rating: 0 ]
Technical Reference : Raspberry Pi
  • Guide to decode SSTV with RaspberryPi and RTL-SDR - A tutorial on how to setup a receiver capable to decode SSTV signals with a small RaspberryPi version 2 and a RTL-SDR dongle. The author explains how to install the needed software to interface the RTL-SDR and a step by step guide to install the QSSTV software used to decode the signals.
    [ Hits: 329 | Votes: 1 | Rating: 1 ]

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