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Antennas : Magnetic Loop
  • Mastering Magnetic Loop Antenna Control - Unveil the secrets of efficient Magnetic Loop Antenna control systems, eliminating the hassle of frequent retuning. With real-time tracking and compatibility with various transceivers, including popular models from Elecraft, ICOM, Kenwood, and Yaesu, this controller ensures seamless frequency adjustment. Explore its high-resolution stepper motor and versatile communication capabilities, revolutionizing amateur radio operation.
    [ Hits: 54 | Votes: 0 | Rating: 0 ]
  • Automatic Magnetic Antenna Tuner - A Magnetic Loop Antenna is a resonant circuit employing a large inductor and adjustable capacitor. Efficiency depends on the inductor's size relative to wavelength. A Magnetic Loop Controller adjusts antenna tuning in real-time, syncing with Transceiver VFO movements. It communicates with various radios, enabling seamless tuning. Stepper motor resolution ensures accurate capacitor positioning, crucial for antenna performance. The Controller's firmware offers diverse functionality, enhancing user experience and antenna efficiency.
    [ Hits: 58 | Votes: 0 | Rating: 0 ]
Antennas : Theory
  • Antenna Measurements - Testing of real antennas is fundamental to antenna theory. The most common and desired measurements are the antenna radiation pattern including antenna gain and efficiency, the impedance or VSWR, the bandwidth, and the polarization. The procedures and equipment used in antenna measurements are described in this page.
    [ Hits: 61 | Votes: 1 | Rating: 10 ]
Antennas : Theory : Impedance matching
  • Performance of 49:1 Ferrite Core Transformers - There are quite a few recipes for building a suitable transformer for an end fed half wave antenna (EFHW), but I was never sure I really understood the main principles. So, I wound a bunch of transformers, made measurements on them using my NanoVNA, learned how to get what I really wanted out of the VNA measurements, and in the process discovered how to build better transformers and be able to predict what they will do
    [ Hits: 151 | Votes: 4 | Rating: 7 ]
Antennas : Tuners
  • Budget-Friendly QRP T-Tuner and SWR Bridge - In the pursuit of an affordable matching and SWR indication solution for the Pixie-based transceiver system this T-Tuner and SWR bridge unit, while not groundbreaking, proves to be a cost-effective performer. With real-world impedance testing yielding a worst-case loss below 0.9 dB, the unit efficiently matches all bands on 80 M to 10 M ham bands, making it a valuable addition to the QRP system.
    [ Hits: 49 | Votes: 0 | Rating: 0 ]
Antennas : W3DZZ
  • Build a W3DZZ Antenna - The purpose of this construction is to enable the realization of an HF antenna called W3DZZ with minimal equipment and low cost. It allows traffic on the bands 3.5 / 7/14/21 and 28MHz.
    [ Hits: 217 | Votes: 1 | Rating: 1 ]
DX Resources : Contest : Contest Rules
  • International SWL DX Contest 2023 - The international SWL Contest is oen to SWL all over the world. You can use a real radio receiver or a kiwi or web SDR. We have many sponsors who will give nice gift for best listeners of AM radios on SW and MW.
    [ Hits: 34 | Votes: 2 | Rating: 5.5 ]
Propagation : Beginner's Guide
  • Mastering HF Communication: Decoding Space Weather Data  new - The article enlightens radio amateurs on utilizing real-time space weather data to optimize HF communication. Navigating through Hp30 index, MUF, f0F2, and eSFI metrics, it explains their significance in band selection and propagation forecasting. With essential links and practical insights, enthusiasts learn to discern optimal conditions for high-band DX, low-band DX, and NVIS operations. The author's observations and antenna optimization tips enrich understanding for effective HF operations.
    [ Hits: 59 | Votes: 0 | Rating: 0 ]
Propagation : NVIS Propagation
  • HF Radio Propagation Forecast  updated - This page offers radio amateurs (experienced and beginners) a useful overview and tutorials on HF propagation conditions. Here you will find basic and advanced explanations, as well as practical methods, charts, maps, models, real-time measurements, assessments, comparisons, references, and an index.
    [ Hits: 353 | Votes: 16 | Rating: 8.56 ]
Radio Equipment : HF Transceivers : Icom IC-7610
  • ICOM IC-7610 Rewind - Without any doubt at all, the best radio I have owned is the ICOM IC-7610. But the grass is always greener and so even though I loved my IC-7610, I thought there might be something better out there. I purchased a YAESU FT-DX101D and really disliked it.
    [ Hits: 108 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF Transceivers : Yaesu FT-817
  • Yaesu FT-817 battery pack - Go portable with an external battery pack. The built-in batteries will not last thirty minutes when transmitting, that's not really practical. An external battery pack overcomes these problems.
    [ Hits: 95 | Votes: 0 | Rating: 0 ]
Software : Audio Recorders
  • Boondock Echo 2 way ham radio recorder - Boondock Echo offers a revolutionary communication experience with an internet-backed recording and playback device for two-way radios. It ensures clear, reliable communication in remote or challenging conditions. Key features include real-time recording, internet connectivity, seamless integration, playback flexibility, rugged design, and a user-friendly interface. Services include product training, hardware maintenance and repair, customization, and regular firmware updates for optimal performance.
    [ Hits: 41 | Votes: 1 | Rating: 10 ]
Software : Awards tracking
  • Hamlog.online - Hamlog is online cloud platform for active amateur radio operators. It supports various on the air activities of various clubs, associations and national amateur radio organizations, allows them to create award programs and deliver awards to those who earned them. Hamlog also has a built-in real-time logger, which allows operators to enter QSO in the system as they make them. It supports multiple callsigns, multiple locations, multi-station activities, etc. Soon it will allow to connect transceivers and other ham radio devices right to the browser, allowing easy online logging virtually anywhere.
    [ Hits: 51 | Votes: 0 | Rating: 0 ]
Software : Logging
  • Hostilog - Hostilog is a logging program for HamRadio it uses a very easy way to enter qso data without any usage of a mouse. You can enter around 300 to 400 QSOs per hour from a paper written logbook, which is really quick compared to other logging programs. Combining and sorting of ADI Files are included
    [ Hits: 60 | Votes: 0 | Rating: 0 ]
Software : Utilities
  • VARAc - VarAC is a FREE, modern HF P2P real-time chatting application for the amateur radio operator that leverages the glorious VARA protocol
    [ Hits: 101 | Votes: 1 | Rating: 10 ]
Technical Reference : AI Ham Radio
  • AI-Powered Radio Signal Cleanup: Battling QRM in Real Time - Amateur radio enthusiast Jean-Paul Suijs discusses combating manmade noise (QRM) in radio signals using AI. Detailing experiments with phase-shifting techniques and the self-learning nature of AI, he explores AI-based audio processing apps for real-time noise cancellation during radio contests, demonstrating results on both medium wave and shortwave bands.
    [ Hits: 67 | Votes: 0 | Rating: 0 ]
Technical Reference : Morse Code Oscillator
  • Morse Code Practice Oscillator - This project builds into a box into which you plug a Morse Code Key. Using the Morse Key creates realistic sounds so you can judge how well you Send. A great tool for beginners to improve Morse sending skills before going on-air
    [ Hits: 62 | Votes: 0 | Rating: 0 ]

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