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The RBN S-Meter visualizes real-time HF propagation data from the Reverse Beacon Network (RBN). It processes thousands of automated spots per hour, providing a real-time picture of active RF paths on HF bands. Users can set their vantage point using _Region Mode_ or _Grid Square Mode_. Region Mode allows selection from broad geographic areas like E. North America or Europe, while Grid Square Mode uses a Maidenhead grid square and radius for more precise data. The app displays eight region panels, each with horizontal bars for bands 160m through 6m, indicating signal strength with a color ramp from green to red. A dimmer trail shows peak hold values, and an S-unit readout provides additional detail. The app is a free web application accessible on any device, offering a practical tool for ham radio operators interested in CW, RTTY, and FT8 signals. It features a Progressive Web App installation option for enhanced usability on mobile and desktop platforms. Users can install it on Android, iOS, and Windows devices, providing a native app-like experience. The app replaces the previous Windows standalone executable, incorporating user feedback to improve features like grid square mode and automatic location detection.

Constructing an End-Fed Half-Wave (EFHW) antenna offers a practical solution for HF operators seeking a multiband wire antenna without the need for extensive radial systems. This design typically employs a high-impedance transformer at the feed point, matching the antenna's inherent high impedance to a 50-ohm coaxial feedline. The article specifically details a 2012 approach, focusing on a transformer with a 49:1 turns ratio, which is a common configuration for EFHW antennas. The resource outlines the construction of a wire element cut for a half-wavelength on the lowest desired band, with specific coil arrangements enabling operation on harmonically related bands such as 40m, 20m, and 10m. It discusses the physical dimensions and winding details for the matching transformer, often utilizing a ferrite toroid core to achieve the necessary impedance transformation. The content provides insights into the operational principles and practical considerations for deploying such an antenna, including methods for tuning and optimizing performance across multiple amateur radio bands. While acknowledging that the presented information from 2012 may be superseded by newer insights, it serves as a foundational reference for understanding EFHW antenna theory and construction.

Setting up a Live Broadcast on the internet using windows pc and in internet connection

An extensive document about Morse Code in amateur radio edited by W5ALT

Details the Highline Amateur Radio Club (HARC), an organization dedicated to public service through Amateur Radio and community engagement for radio enthusiasts. The club conducts a monthly general meeting on the 4th Saturday at 10 AM at Burien Fire Station 28. HARC also hosts a weekly net on Tuesdays at 7:30 PM, operating on **146.660 MHz** with a -600 kHz offset and a 103.5 Hz **CTCSS tone**. Additionally, members gather for a weekly breakfast on Fridays at 9:30 AM at Tuscany at Des Moines Creek. The resource provides current weather conditions for Burien, WA, displaying temperature, wind chill, and a three-day forecast from the National Weather Service Seattle/Tacoma Office. It also links to the latest ARRL Newsletter, noting a system breach in May 2024 affecting archived links. The club's activities include regular meetings, on-air nets, and social gatherings, supporting local amateur radio operations and community involvement.

A quick and easy logging application designed for BCL and shortwave listeners, requires a recent Windows OS and .Net Framework

Article about isolation transformer construction to perform optimal impedance matching. Winding the FCP isolation transformer, includes interesting table for Winding Turns and Lengths and Core Configurations for T300 T200 T400 toroids

Code Synthesizer for 2-way Radio Signaling works on Windows XP and Windows 7

The program sends morse code audio via sound card and can be used under Windows in Danish only

Narrow Band Emergency Messaging Software (NBEMS) is an Open Source software suite that allows amateur radio operators to reliably send and receive data using nearly any computer (Windows, Mac, and Linux) and any analog radio without requiring a dedicated digital infrastructure or specialized modem hardware

The Windom antenna, one of the oldest antennas developed for amateur use, has had a complicated history, one as interesting as the theory of the antenna itself.

This EXCEL Program Worksheet calculates the safe operating conditons for a toroidal transformer operating between 1 and 50 MHz. Manufacturer data for complex permeability, magnetic dimensions, and saturation flux density must be available. Some core types which are commonly used in amateur transmission are included. The program produces limiting winding voltages for linear operation and temperature rise over the range of frequencies and power specified.

A 20-meter window frame stealth antenna, based on a design by _PD7MAA_, utilizes a single 620cm wire loop for discreet installation. The feeding mechanism employs a _4C65_ toroidal core, where the antenna loop functions as a single-turn secondary, and the feedline wraps twice. Tuning is achieved via a 30cm twisted wire stub, allowing for SWR adjustment within the 20m band. This design is specified for QRP operation, with a maximum power limit of **25 Watts** to prevent core saturation or arcing. Wire selection recommendations include thin, insulated copper wire (0.75mm to 1mm) for blending with architectural elements. The guide focuses on practical construction steps for a low-profile 14MHz antenna.

Remembrance Day Contest Logger free Windows software. Remembrance Day is a popular contest in Australia.

This freeware application for Linux and windows, allows you to convert an ADIF file to a KML file so you can map your QSOs easily and open it with google maps, or google earth or any application supporting the KML format

Free Windows program intended to be used as a training aid for sending CW using an iambic Winkeyer from K1EL Systems. Iambic Master operates as a game. The objective of the game is to send the text in the Target box as accurately as possible.

A multi tool Windows program that has been designed to offer the EMC RF and Radio Engineer a large variety of tools for Attenuation calculation, VSWR analysis, FIR Filter calculations, EMC system configuration, Radar testing , RF Filter calculation and much more without the need of a live internet connection.

The complete software suite to Edit, Analyze, Generate Statistics, View multiple logs simultaneously, Map QSOs, Import and Export to Cabrillo or ADIF files. The Contest Log Analyzer has been developed as a complete database management application, where you can create separate Databases, containing several Logs, a convenient way to save, in one place only, all your log files that accumulate over the years. It runs on Mac and Windows, and it is a commercial product.

Communicating from the West River Valley in Windham County, Vermont, USA

GridTracker listens to live traffic from WSJT-X or JTDX and displays it on a map. It can also load ADIF log files, load clublog, lotw, hrdlog.net and other sources to diplay your logbook statistics and map your QSOs. GridTracker is a free application for windows Linux and MacOS.

This page provides a detailed guide on the Guanella Current Balun for ham radio operators. The author shares very nice schematics, photos, and explanations on the construction and use of this type of balun. The content explains when a balun is needed and how it can help with common-mode currents in antenna systems. It also discusses the construction process, including winding the balun around a ferrite core. This resource is useful for hams looking to improve their antenna systems and reduce common-mode currents for better performance. This article is in Dutch.

Aircraft Scatter Sharp is a windows application to calculate and assist airscatter operations. Real-time capture and display of plane position data derived from internet plane servers, highlighting of aircraft near the ideal position for scatter, Real-time estimation of Doppler shift and its rate of change.

Provides a robust logging solution for amateur radio operators across multiple operating systems, QLog simplifies the process of recording contacts and managing station data. It leverages the _Qt framework_ for its graphical user interface and stores all QSO information efficiently in a local SQLite database, ensuring data integrity and accessibility. This design choice supports a streamlined user experience for daily logging activities. QLog supports essential logbook functionalities, enabling hams to accurately document their two-way radio contacts. While not specifically designed for high-speed contest operation, it serves as a reliable tool for general amateur radio logging, allowing operators to maintain detailed records of their on-air achievements and station activities. Its cross-platform compatibility, including Linux, Windows, and macOS, makes it a versatile option for a wide range of amateur radio enthusiasts seeking a free and functional logging application. The project is a fork from _7h0ma5/QLog_, indicating a continued development path.

A software defined receiver located in Tuscany Italy with a Windom antenna convering HF bands

Windows log software for the popular RD contest, usually held in Australia in mid August.

This article provides details on building a 6 Meter J-Pole antenna using PVC pipe for an enclosure. This antenna uses flat 450 ohm Window Line for the tuning stub.

A windows program to learn Morse code and doing QSO in CW. The training course contains 39 Lessons based on Koch method. It can sends only letters, only numbers, only punctuation

SDARC The Swindon and District Amateur Radio Club England UK

Run Morse Runner on Apple MacOSX computers using Wineskin. Morse Runner is a popular MS Windows morse code contest simulator. You can do this by yourself or just download the ready-made dmg and use it on your apple mac.

An end fed antenna winder design that also contains the necessary matching toroid. This would be just the thing to throw in your backpack for portable operation.

Current Solar Wind Conditions

When experimenting with the WellGood Loop antenna, I came across the PA0RDT MiniWhip design referenced in several places. The construction of the PA0RDT MiniWhip is simpler than the WellGood Loop since there are no inductors to wind, but during my testing, I have found the loop to have slightly better performance.

QSO Relay is a Windows desktop application that listens for contacts being forwarded from WSJT-X/JT65-HF and JTAlertX and write to Ham Radio Deluxe Logbook v6.x database

A project by LY3H of a complete Scalar USB network analyzer with freeware windows software, sweep range 100 kHz to 160 MHz, powered by USB.

DxDozer is a Windows-based amateur radio logbook designed for both new and experienced DXers, featuring a robust logging system with extensive search capabilities. It offers seamless integration with FT8, displaying received stations from WSJT-X in a DX Cluster-like view, indicating LoTW status and prior contacts, and initiating QSOs directly. The software supports an unlimited number of callsign logbooks and allows multiple operators to log simultaneously to a single database, enhancing its utility for multi-operator stations or contest operations. The application includes a sophisticated DX Cluster with highly configurable filters based on band, mode, continent, worked/confirmed status, and LoTW participation, enabling users to monitor specific calls or countries. DxDozer simplifies QSL management by facilitating one-button uploads to LoTW and ClubLog, and downloads of new confirmed QSOs, with a dedicated field for QSL medium. The software provides both 'Easy' and 'Expert' modes to cater to different user proficiency levels, and is available via a yearly subscription after an initial free trial period.

How to setup the Yaesu FT-847 along to the PSTRotator under Windows 10 PC with Omnirig.

This unique online tool helps Ham Radio operators to choose the right rotator for medium and large HF antenna systems. The algorithm implemented in this calculator is the result of 40 years of experience in the HF Antenna sector. Given the Wind Speed, the total antenna square area, and the boom length, it will return the calculated torque value.

Time Mapper UHD is a versatile mapping and time visualization program offering multi-satellite viewing with frequency display and unique country-pairs for PskReporter data. It features live feeds from logging programs and can plot ADIF files. Ideal for schools, offices, or amateur radio stations, it provides customizable 4K or HD world clock displays with over 60 map layers, including ham radio zones and natural features. The program supports various time functions and can import logs for detailed analysis. It runs on Windows 10 or 11 and offers a 30-day free trial.

MorseKOB is a program for doing landline telegraphy and American Morse with the help of a computer. Can run on Mac OS and Linux, in addition to Windows.

Receiving & Decoding NOAA Weather Satellites using a simple rtl-sdr dongle, a helix antenna and a Windows PC

Ham Call Lookup is an windows phone app that allows you to perform amateur radio callsign lookups via QRZ.COM. It also incorporates DX cluster feeds, DXCC information retrieval and Solar data all within one application on your Windows Phone. For callsign lookups, the application uses the QRZ.COM XML interface, please register at QRZ.COM for an account if you do not already have one. The application will happily work with a free QRZ.COM account although it is recommended to use a paid account, as a minimum the XML Logbook Data paid option, in order to access the full functionality of callsign lookups within the application.

A mircovert antenna assembled for the 40m version of the DL7PE antenna. A one meter long aluminum tube with 24mm diameter is used for the base (element 1) and a 50cm aluminum tube with 20mm diameter for element 2 (the extention). A pvc pipe, 34cm long and with a diameter of 38mm, is used to wind the coil on (1mm enamelled copper wire).

Choking balun for lower HF and MF bands. (1.8MHz - 10MHz). Requiring a choking balun to isolate the potential RF pick up on the coax cable as it runs past equipment such as computer within the radio room at lower HF and MF frequencies a simple method of winding RG58 coax onto a Powdered Iron Toroid Core was constructed.

This blog article introduces an updated repeater controller project utilizing the Arduino UNO. It includes a CW identifier, and the ID message can be customized using hex codes. The author offers a Windows command line program for easier message coding and provides a link for download. The controller features three adjustable timers for IDer, Timer-out, and Squelch-tail. The article also mentions the use of an audio switch to control audio levels between the receiver and transmitter. Detailed instructions and code files are available on the author's website for both version 1 and version 2 of the Arduino repeater controller. The project aims to enhance repeater functionality and audio management in ham radio operations.

Presents Wayne Kerr Electronics, a manufacturer specializing in precision component measurement products. The company offers a range of LCR meters, impedance analyzers, and transformer test systems designed for various applications in electronics manufacturing and research. Specific product lines include the 3260B Precision Magnetics Analyzer, which measures inductance, capacitance, and resistance with high accuracy, and the 6500B series of LCR meters, capable of testing components across a broad frequency range up to 120 MHz. The 3255B and 3265B series provide solutions for transformer and inductor testing, including turns ratio, leakage inductance, and inter-winding capacitance measurements. These instruments are utilized in quality control, component characterization, and production line testing, ensuring performance and reliability in electronic circuits. Wayne Kerr's offerings support engineers and technicians in verifying component specifications.

When planning your operating schedule, a reliable contest calendar is an essential tool for any serious contester. This DARC-maintained resource compiles current contest announcements for both HF and VHF/UHF operations, making it straightforward to identify upcoming opportunities for competitive radio sport. My own experience has shown that having a centralized, well-organized calendar saves significant time, especially when targeting specific events like the Clubmeisterschaft Classic (CMC) or the KW-Pokal. The DARC calendar highlights these German and European scoring contests in yellow, providing immediate visual cues for participants. HF contests are clearly marked in blue, while VHF/UHF events appear in red, simplifying band-specific planning. Beyond the major international contests, the calendar emphasizes regional events, which can be particularly useful for those aiming to improve their standing in local club competitions or explore less common contest formats. Special activity periods, such as those spanning multiple days, are also noted with a green background, ensuring operators are aware of extended operating windows.

The MiniTioune receiver project, developed by Jean-Pierre F6DZP, consists of the home constructed MiniTiouner hardware which interfaces via a standard USB 2.0 port to a Windows PC running the MiniTioune software. It can be used to receive satellite broadcasts transmissions making it ideal for use on Q-oscar 100 Es hail-2 without any external frequency converters.

Aircraft scatter is easily seen on the spectrogram window of digital communication apps, when you know what to look for. Examples of real aircraft scatter usage on six meters band

Hambook is a modern general-purpose CAT-control software package for HAM radios targeting the Windows platform.