va tech

va tech

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• Shortened 40 meter Vertical for POTA SOTA - Build A Shortened 40 Meter Vertical antenna For POTA / SOTA Activations. A project for a portable wire antenna for 40 meters band suitable for POTA or SOTA operations.
  [ Hits: 125 | Votes: 1 | Rating: 10 ]

• Fractal Antennas Master Course - A course on fractals antennas theory provided by La Ecole nationale superieure de techniques avancees in France. Course is in French.
  [ Hits: 67 | Votes: 0 | Rating: 0 ]

• Drive-On Antenna Mast For POTA - This antenna mast mount uses two Reese hitch extensions that are welded on to a piece of 2 inch square tube. It comes apart in two pieces. The vertical pipe on the left is welded on to a 2 inch piece of square tube that fits into the Reese hitch extension.
  [ Hits: 156 | Votes: 1 | Rating: 9 ]

• Homemade Satellite Yagi - In this article author illustrate a homemade yagi antenna for satellite operations. The antenna includes a VHF antenna and an UHF antenna with a band splitter.
  [ Hits: 207 | Votes: 2 | Rating: 7.5 ]

• A Versatile SOTA Antenna Tuner - This is a detailed, technical piece, intended mostly for makers and more creative activators, who enjoy building and using their own tools on the summits. A multiband portable antenna tuner supporting 10W, small and light, suitable for SOTA operations
  [ Hits: 265 | Votes: 2 | Rating: 10 ]

• Unearthing VHF Contest Secrets: An In-Depth Analysis - In this article, authors delve into the inner workings of the IARU R1 VHF contest, the world's largest 2m contest. While activity levels are declining, the top performers consistently maintain their results. Authors explore the physical constraints of achieving higher point totals and speculate on various factors like improved technical capabilities, increased interference, and evolving station setups. It is a fascinating journey into the contest's dynamics, leaving room for intriguing speculations about its future.
  [ Hits: 70 | Votes: 2 | Rating: 10 ]

• Silphase Technologies - Amateur radio SDR Receiver and Transceiver manufacturer , makers of the Silphase R1 an innovative HF receiver with high performance real-time spectrum scope.
  [ Hits: 132 | Votes: 0 | Rating: 0 ]

• Evolution of Car Radios: From Marconi to Motorola - his historical account traces the development of car radios from Marconi's mobile wireless telegraph station on a steam engine vehicle in 1901 to Motorola's iconic car radio models in the 1930s. It highlights key milestones such as Alfred Grebe's radio-telephone experiments on Long Island and the introduction of Marconi-Phone 8 radios by the Daimler Company in England. The narrative explores technological advancements, including the transition from TRF to Super-Heterodyne circuitry and the integration of push-button controls. The evolution from vacuum tubes to transistors and compact discs is also documented, showcasing the continuous innovation in automotive entertainment systems.
  [ Hits: 51 | Votes: 1 | Rating: 1 ]

• Hamstick Experimentation: A Day of Surprising Results - In his POTA activation, WK4DS experimented with radials for hamstick antennas. Despite sun and RF noise challenges, successful connections were made. Surprisingly, tuned radials proved unnecessary, simplifying setup. Hamsticks demonstrated versatility across frequencies. Increased power improved signal quality, sparking his curiosity for further exploration in radio technology.
  [ Hits: 44 | Votes: 0 | Rating: 0 ]

• WiRES-X Bible - The purpose of this book is to provide a common source for WIRES-X, gather information from manuals, experiences from the Amateur Radio Community, and the best practices from both the Amateur Radio Community and the Bakken Amateur Radio Society. To provide a platform for learning, experimentation, and advancement of Amateur Radio skills and art. A platform of Discovery and to have FUN. To encourage networking, sharing, and exchange of interesting technical information of WIRES X, where people are encouraged to help each other out.
  [ Hits: 417 | Votes: 0 | Rating: 0 ]

• Unpredictable Aspects of 160 meter Propagation - Come learn why it is very difficult to predict propagation on the top band. Ionospheric Variability, Time Variations of Ionospheric Parameters, Atmospheric Gravity Waves, Ionospheric Absorption and The Role of Negative Ions.
  [ Hits: 65 | Votes: 0 | Rating: 0 ]

• FT-857D Serial and Sound Card Interface - A Simple Serial and Sound-Card Interface for the Yaesu FT-857D using an FT232R USB-to-serial bridge chip.
  [ Hits: 254 | Votes: 0 | Rating: 0 ]

• 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 ]

• Hamtech - HAM-made engineering products supplies and produces coaxial relays, antenna switches, sequencers, roller inductors, variable capacitors, low noise preamplifiers, RF power rotary switches and coil bodies.
  [ Hits: 192 | Votes: 0 | Rating: 0 ]

• International Radio Club of America - Established in 1964, IRCA is a dedicated club focused on the pastime of tuning into distant stations on the AM broadcast band (510-1720 kHz). The club's official publication, DX Monitor, is released 35 times annually. It is published weekly from October to March, twice in September and April, and monthly from May to August. DX Monitor includes members' loggings, articles covering radio stations, receiver reviews, technical pieces, DX tips, and other content of relevance to Broadcast Band DX enthusiasts. Additionally, IRCA is affiliated with ANARC.
  [ Hits: 29 | Votes: 0 | Rating: 0 ]

• Skywave Linux - Linux for shortwave and amateur radio monitoring. Supports popular SDR hardware and online streaming from KiwiSDR, WebSDR, and Spyserver sites. Articles about using Linux with your SDR devices.Skywave Linux, an innovative operating system, leverages cutting-edge technology for seamless access to radio signals globally. Ideal for regions with limited internet access, it effortlessly connects to a network of SDR servers, offering high-performance SDR operation without the need for extensive hardware. With pre-installed and configured SDR software, Skywave Linux simplifies signal discovery and operation for all users.
  [ Hits: 285 | Votes: 0 | Rating: 0 ]

• VARA - VARA HF is a soundcard modem that can be found on the HF bands exchanging traffic (Winlink). VARA implements an High Speed Data Mode and comes in 2 separate programs VARA FM and VARA HF. VARA is a High Performance HF modem based on OFDM modulation. VARA Modem, brings state of the art Military grade technology to new and existing HF data. Introduces a new standard of technology available for Amateur and Commercial use. Designed for operation within a SSB Bandwidth of 2400 Hz.
  [ Hits: 105 | Votes: 1 | Rating: 10 ]

• ITU Synergizing AI and Radiocommunications for Smarter Connectivity - Explore the pivotal role of artificial intelligence in advancing emerging radio technologies, facilitating ubiquitous connectivity essential for sustainable development, the digital economy, and the Internet of Things, guided by ITU's harmonized regulations and standards.
  [ Hits: 12 | Votes: 0 | Rating: 0 ]

• Build an Arduino CW Decoder - An Arduino-Based Solution for 5-35 WPM Signals. Explore the circuit, controls, and setup of this innovative device designed by Allen Baker (KG4JJH). Decode Morse code efficiently, providing a valuable tool for operators, from novices to veterans, and offering a hands-on experience with Arduino technology.
  [ Hits: 360 | Votes: 3 | Rating: 7 ]

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