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An antenna system is electrically small if it's enclosing sphere is <&#955;/2&#960;. So a 10m band antenna of under 1.6m long qualifies.

Getting your Raspberry PI up and running your D-Star radio kit. This will work with DVAP / DVRPTR or DVmega

Maintaining vintage Eddystone receivers often presents unique challenges, as detailed by Victor Jenkins in his refurbishment of an EA12, where his deep understanding of RF circuits ensures optimal performance for daily shortwave listening. Similarly, Gerry O’Hara VE7GUH, a prolific contributor to the EUG website and a trustee, meticulously documented his restoration of an Eddystone S830/2, even addressing an unusual instability issue with a follow-up postscript article and YouTube videos demonstrating the fix. His work, along with numerous other articles on the "Restorations" page, showcases a master's approach to bringing vintage sets back to factory specifications or better. Beyond technical restorations, the EUG also shares compelling historical narratives. One such story recounts the discovery of a long-lost 78rpm recording featuring Eddystone Radio Ltd.'s founder, George Stratton Laughton, and other key figures discussing the company's wartime and post-war contributions to shortwave communications. This six-minute BBC production, transcribed into an MP3 file by Peter Carney, offers a rare auditory glimpse into the company's legacy, highlighting its role in supplying equipment to police, ministries, and expatriate British workers. The community aspect thrives through shared experiences, like Roger Trickett's anecdote about his Eddystone EC10, which has been continuously powered for 50 of its 54 years, traveling across continents and enduring various modifications. Another intriguing account from Roy GM4VKI details the "S640 Identity Crisis," where a seemingly standard S640 receiver turned out to be a masterfully engineered 80/20-meter SSB transceiver built into the original chassis by GI3ZX, showcasing incredible ingenuity from a bygone era of amateur radio.

This article help on solving problems related to packet radio and TNC.

Suppliers of all sorts of wire from hard drawn copper to 4.75mm thick aluminium wire. a good source and good prices too. Located in the UK.

Amateur radio blog from UK

Electronic keyer by pressure sensor. SEN-09673 is used for detecting touch.

British ham radio antenna products manufacturer, base and portable antennas, mobile antennas, baluns, masts, production is mostly based on wire and whip antennas

Nearly half of all reception problems are due to deficiencies or faults in the television receiver, the aerial lead or the aerial. This article will help you to check whether the problem you are having is due to one of these causes.

DX Maps provides a specialized map printing service, focusing on amateur radio applications such as world prefix maps and custom great circle projections. The platform allows radio operators to visualize propagation paths and DX entities relevant to their QTH and operational goals. This service supports the creation of high-quality, large-format maps tailored for shack display or operational planning. The service facilitates the generation of personalized maps, which can include specific callsign locations, beam headings, and other critical amateur radio data points. Users can specify parameters to create maps that aid in understanding global propagation conditions and optimizing antenna aiming for long-distance contacts. The UK-based operation ensures a localized service for European hams, with international shipping options available. DX Maps also offers QSL card printing, complementing its mapping services.

This website was originally inspired by the discovery of a number of QSL (radio reception report) cards dating from the 1920s and is intended to make images of the cards available to as many people as possible.

The Milwaukee Repeater Club is the oldest continuously operating repeater in Milwaukee

A practical guide to program Chinese Radios like Baofeng UB and BF series hanheld trnsceivers

The Yukon Amateur Radio Association has a series of 11 repeaters located throughout the territory, that are all, except for Watson Lake, linked together.

Ham Radio Club in Wales UK

D-Start site sponsored by Icom Uk

We supply and maintain radio systems. Anyone that requires a radio communications system can be confident that we can supply and maintain a scheme that is second to none

Teaching the foundation, intermediate and advanced licences.

Streaming media portal for the BATC www.batc.org.uk. If you have any material relating to ATV that you would like to share with the rest of the ATV community, please get in touch so that we can present it here.

NWRS North Wales Radio Society

The interactive Smith chart enables users to navigate their way around a Smith chart, using simple discrete element impedance matching. This page allows users to try using the Smith chart, for education and interest purposes, without installing any software. Try changing the value in the load box to see the location of the impedance on the chart.

The Exeter Amateur Radio Society has been growing since 1920 when it was born as the Exeter and District Wireless Society.

G8YMM Amateur radio web site with interest on ATV

Haredata Electronics is your one stop shop for Power Supplies, Chargers, Battery Packs & Accessories. Power Supplies Chargers, Battery Packs , Power Supply Accessories , Haredata Electronics Limited,

World-Wide 50MHz Beacons database maintanied by G0LGS provide a fully sortable table available also in a google map format

UT7UT ukrainian radio station

Dealer for Motorola to the full Kenwood, Icom, Entel, and Foretrack. Offer Based in East Sussex UK

UK based CB Radio, Ham Radio, PMR Radio web forum

The Cambridge University Wireless Society (CUWS) serves as the amateur radio society for students and staff at Cambridge and Anglia Ruskin Universities, fostering interest and activity in two-way radio communication. It provides a platform for members to engage with various aspects of amateur radio, including operating, technical experimentation, and community building within the university environment. The society's activities typically encompass station operation, antenna construction, and participation in contests and DXing. As a university-affiliated club, CUWS offers practical experience in radio theory and application, often utilizing the club callsign _G6UW_. Members learn about different modes of operation, such as CW, SSB, and digital modes, and gain hands-on experience with transceivers and associated equipment. The society's focus includes preparing members for amateur radio licensing exams and promoting ethical operating practices. Participation in CUWS provides a foundation for future involvement in the broader amateur radio community.

Ukrainian Amateur Radio League official web site of the Ukrainian Ham Radio League

Easy to use online Slim Jim antenna calculator. Input your frequency to automatically calculate the lengths of the different antenna parts.

Guide to JT65A and JT9 via WSJT-X Software by Andy K3UK

The Tektronix digital multimeter is a feature-rich tool with the accuracy and precision you need for your most demanding measurements.

Have you measured the SWR at the antenna?

Hinckley, Leicestershire ham radio club

The CobWebb antenna project is a compact, multiband HF solution ideal for amateur radio operators. Covering 14-28 MHz, it features a square dipole array with near-omnidirectional coverage and unity gain. This guide details a DIY approach, using a 1:4 current balun for impedance matching. Construction involves aluminum and fiberglass tubing, with optimized element tuning for SWR performance. Weather resistance improvements and resonance shift considerations are also discussed. Build your own CobWebb antenna for an efficient, space-saving HF experience.

View real-time spot information by band for active amateur radio operators around the world via the DX Cluster network, taking raw data from a JSON API made available by DXCluster.co.uk

Article and video showing a technique to straighten Microbore copper pipe that is useful in antenna construction. This technique has been implemented to build a Quadrifiliar Helix antenna.

Presents RigOne, a radio controller application designed for Windows 10 (later releases) and Windows 11, with a macOS version under active development. The software provides core operational controls such as tuning, VFO following, signal metering, and audio management, emphasizing a clean interface for everyday use. It supports native Icom direct control, with the **IC-7300** serving as the primary tested profile, and integrates **Hamlib** for broader compatibility across various transceivers. The resource details specific features, including frequency and mode read/write, VFO A/B switching, quick mode/band selectors, and switchable analog-style or horizontal-bar signal meters. For the IC-7300, RigOne offers an integrated panadapter, waterfall display, native VOX control, and Twin PBT controls, leveraging live scope data for an enhanced visual operating experience. The application focuses on essential functions, avoiding unnecessary clutter. It outlines the latest version, v1.2.5.1, highlighting updates like a compact layout selector for Tall mode, direct frequency entry, and refined fixed 16:9 panel layouts. The page also clarifies hardware compatibility, noting extensive testing with the IC-7300 via USB/COM CI-V, and invites user feedback for expanding Hamlib support to other radio models, ensuring the software evolves based on real-world amateur radio station use.

Isle of Man Repeaters maintained by David Osborn GD4HOZ this site covers the VHF repeater GB3GD and UHF internet linked 70cm repeater GB3IM. Using Allstar software for linking GB3IM is the only site in the uk to have three transmitters. Supported by the Isle of Man Amateur Radio Society

Online log for the VK9C/G6AY DX-pedition

CCTV equipment, ip cameras, software and webcams

We are small club of individuals who like to explore and have fun with the many aspects of radio communication and technology utilising radio.

A discharge circuit which you could use to cycle the batteries

The Chester & District Radio Society is affiliated to the Radio Society of Great Britain (RSGB)

Description of what is a transformer and winding types

This site, run by Radio London Ltd, is dedicated to Radio London -Big L (1964 - 67), the Big L Fab 40 charts, 60s Offshore Radio and Music.

A 160 Metre Transmitting and Receiving Thin Wire Magnetic Loop Capable of DX. Designed and Patented by Ben Edginton G0CWT

Map and list of amateur radio Repeaters in Ukraine in Russian

Successful two way contacts were made on 75976.2 MHz covering a distance of 79.6km and in years later 129 Km