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Horn Antenna - The energy of the beam when slowly transform into radiation, the losses are reduced and the focussing of the beam improves. A Horn antenna may be considered as a flared out wave guide, by which the directivity is improved and the diffraction is reduced. One of the first horn antennas was constructed in 1897 by Bengali-Indian radio researcher Jagadish Chandra Bose in his pioneering experiments with microwaves. The modern horn antenna was invented independently in 1938 by Wilmer Barrow and G. C. Southworth. This Horn model antenna is suitable employed in the UHF or SHF radio bands. Making this horn model antenna it will be easy for a beginner to make if it works in the 10GHz frequency, because small dimensions so it is not so difficult and also offers gain up to 25dBi.

A collection of IARU Member Society Logos, hanging your mouse over each logo you will see country, prefix, zones, continent & time zone

Author proves a swift and enjoyable method for scanning and exhibiting cherished QSL cards in the shack. Scanning each QSL card and displaying them. A Modern Solution for Scanning and Showcasing Your Favorite QSL Cards

Log online for W8S DXpedition to Swains Island 2023 provided by club log

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.

The Communicator, a digital magazine by Surrey Amateur Radio Communications (SARC), offers over 125 pages of engaging amateur radio content. With contributions from regular columnists and minimal advertisements, it delivers practical articles, tips, news, and how-to guides for all levels of the hobby, reaching readers in over 165 countries.

VU4W online log for Andaman Islands DX pedition 2022

A voice keyer for Morse Code written for Arduino

Online log for 7P8RU Lesotho DX Pedition 2021

Multi Mode 70cm DIY Repeater Build Project made with two Tait TM8235 and acting as modem a Repeater Builders MMDVM plus a Raspberry PI

Online Log CY0S Sable island DX Pedition 2023

LogConv is a versatile utility designed to convert Amateur Radio log files between various formats such as ADIF, Cabrillo, CT9, CT10, EQF, and TR Log. It offers both GUI and Command line versions for user convenience. LogConv normalizes QSO data, breaking it into separate fields for better visibility. Additionally, it can extrapolate geographic information from contest exchanges, aiding in awards tracking

Wavelog is a web-based amateur radio logbook application launched in February 2024 by four core developers (DF2ET, DJ7NT, HB9HIL and LA8AJA) who forked from the established Cloudlog platform. This open-source project represents significant advancements in stability and functionality, developed by radio enthusiasts for the amateur radio community. Wavelog distinguishes itself through simplicity, powerful features, and versatile accessibility—allowing users to manage their radio logs from anywhere via professional servers, standard web hosting, or even home Raspberry Pi setups. The project embodies the collaborative spirit of the amateur radio community, driven by passion rather than commercial interests.

Discover how to easily listen to amateur radio bands with insights from Frank SWL, an experienced radio enthusiast. This guide covers essential tips for tuning into frequencies between 10 meters and 160 meters using modern tools like Web SDR and Kiwi SDR. Learn about identifying callsigns, understanding Q codes, and optimizing your antenna setup for better reception. Whether you're a beginner or an experienced listener, this article provides practical advice for enhancing your radio listening experience in 2025.

This blog post discusses the use of TV-type 75 ohm splitters and taps in 50 ohm systems on the amateur HF, VHF, and UHF bands. The author shares insights and tips on how hams can effectively utilize these components for their radio setups. Whether you are a beginner or experienced operator, this information can help you optimize your equipment and improve your radio performance.

A low-cost Arduino project expanding on the button tutorial, where three inputs act as "buttons" generating Morse code on a WOTDUINO. This keyer, costing around £4, offers learning potential and hints at more complex ham radio applications.

On-line log for Z21RU DXpedition to Zimbabwe

5V7RU DX Pedition to Togo online log search provided by clublog

A quick fix for a Yaesu FT-757GXII blank display

On-line log for 3D2CCC DX Pedition to Conway Reef 2024, service provided by ClubLog

P29RO online log of Papua New Guinea DX Pedition 2022 powered by club log

If you are totally new to all this and have never used a Repeater before, this post may help you a little.

The author describes building a remote switch box to control the direction of two reversible Beverage antennas. The switch uses a buried cable and relays to select the desired antenna direction from the shack. The design is simple and uses common components.

A blog post about experimenting AI on writing blog post and creating pictures. This page includes also a youtube video by VE4VR experimenting ChatGPT over ham radio bands.

This tutorial demonstrates how to charge laptops or tablets, like the Microsoft Surface, using off-grid 12-volt batteries typically used for ham radio gear. The guide highlights the importance of selecting a reliable USB-C PD adapter, recommending a 15V, 60W minimum with 5–20V, 3–5A capability. Featured tools include a 100W USB-C adapter and a USB multimeter for monitoring power usage. The video also explores the compact, efficient Power Queen 50Ah LiFePO4 battery for portable power solutions.

DX News and DX Info by EA1CS

This project goal is to construct a versatile and informative RF power meter. The user-friendly interface, comprehensive power measurement capabilities, and AM detection function make it a valuable tool for various RF applications

Repair of a Yaesu FT-1000 MP Mark V probably struck by lightning.

This blog post from KA7OEI covers the author's initial exploration into the world of Arduino, a popular open-source electronics platform. The post likely discusses the author's experiences, challenges, and successes with Arduino projects, particularly in relation to amateur radio or other technical hobbies. It may provide insights, tips, or inspiration for hams interested in incorporating Arduino into their own projects. The content is likely informative, personal, and geared towards amateur radio operators or electronics enthusiasts.

Online Log for PR0T Trinidade and Marim Vaz Islands 2023

The POCKET TUNER V1.1 is a highly compact HF T-Match antenna tuner designed for QRPp and QRP portable operations. With a credit card-sized form factor, it is tailored for low-power setups, supporting HF bands from 10m to 40m. The tuner features a unique design using rotary switches for precise capacitor adjustments, allowing tuning in small increments. Its inductance selection is optimized for various bands, ensuring efficient performance. Equipped with a resistive tuning indicator, it protects the transmitter by reducing SWR during adjustments. This versatile and portable tuner is ideal for field operations, enabling efficient antenna matching for low-power rigs.

KLog is a multiplatform, multilanguate free ham radio logger, that runs on Linux, Windows and macOSx. KLog provides QSO management, useful QSL management DX-Cluster client, DXCC management, club log integration, WSJT-X and DX Marathon support.

4W8X DXpedition - November 2023 Timor Leste

Online log for E51D DX-Pedition to North Cook Islands service provided by clublog

Online log for 3D2RRR dx pedition to Rotuma

This blog is to talk of radios in AM on SW from China and TX and RX made in Asia

A guide to programming a Yaesu FT5DR under Ubuntu Linux using CHIRP and the USB-68 Cable. This operation that is usually very simple and easy to do under Windows, need more configuration efforts under linux os.

mart Logger is a versatile web app designed for seamless ham radio logging. Compatible across all platforms, it works offline and online, syncing logs effortlessly across devices. With advanced features like offline callsign lookup, auto-formatting, and POTA spots, it caters to general logging, contests, and portable operations. Install it on your device for full offline functionality or use it directly in your browser. Smart Logger ensures efficiency, flexibility, and simplicity for all amateur radio enthusiasts.

Online Log for T33T by Clublog, DX pedition to Banaba Island 2022

Hams can be annoyed by noise from PoE cameras and access points. These devices and their long cables act like antennas, picking up and spreading unwanted radio signals. By wrapping ferrites around the cable will reduce this noise. It won't silence it completely, but it can make a big difference.

Program cooperating with Logger32 and 4 QRZ servers with http method for personal data . Program is very quickly. Correct field QSL_VIA from QRZ , that you can put it on a QSL . Also show if present QSL Bureau for a country de sp9auv

SH6 is a versatile, browser-based utility designed for the detailed analysis and visualization of amateur radio contest logs. Supporting standard formats such as Cabrillo and ADIF, the tool allows operators to upload personal files via drag-and-drop or access a searchable public archive containing over one million logs. Key capabilities include comprehensive performance metrics, offering summaries of band breakdowns, QSO rates, and beam headings. Furthermore, SH6 provides advanced geographic visualization through interactive maps, analyzing contacts by country, zone, and continent. A standout feature is the side-by-side comparison mode, enabling users to contrast two distinct logs for strategic assessment. SH6 transforms raw log data into actionable insights regarding operator performance without requiring software installation.

For phased C-Poles, matching choke baluns are essential to maintain intended phasing, beam pattern, and gain. The author uses a low-loss, ferrite-core balun design with 19 turns of RG-174/U coax for optimal performance.

The author fixed a friend's Kenwood TS-850S radio, which suffered from Capacitor Plague, a common problem in 1990s electronics where capacitors leak and damage circuit boards. The CAR board, responsible for generating signals, was especially affected. The author cleaned the board, replaced the capacitors, and repaired a broken trace. Although the radio mostly functioned afterward, the "Slope Tune" control behaved abnormally. The cause seems to be a software issue, not a hardware one.

On-Line log for T32EU DX Pedition to East Kiribati OC 024

This page discusses the construction and design of a shortened 2-element Yagi antenna for the 40-meter band, focusing on the driven element. The author shares insights on adding hats to the coil to reduce losses and improve performance. The article also mentions the use of EZNEC modeling software and an AIM4170 analyzer for tuning. Amateur radio operators interested in such antenna design and optimization for the 40-meter band can find useful information and practical tips on this page.

Blog about the ham radio radio experiences of DK4MJ, mostly POTA and outdoor activities. In German.

"The QRP Adventures of VE3FI" is a captivating blog that chronicles the amateur radio experiences of Bill, VE3FI, over two decades. Holding Canadian Basic, 5-word CW, and Advanced licenses, Bill's main interests include DXing and QRP operations. The blog offers detailed accounts of his portable activations, such as a recent outing in March 2025, where he achieved impressive DX contacts on the 10-meter band using just 8 watts and a Hamstick antenna. Bill's engaging storytelling and practical insights make this blog a valuable resource for both seasoned and aspiring amateur radio enthusiasts.

The website offers technical musings related to amateur radio, with a focus on measuring insertion loss and checking matching. It provides insights and tips for ham radio operators looking to analyze RF devices and circuits effectively.

Online log for TY0RU DXpedition to Benin 2022 provided by club log