Search results

Replacing fan to the Elecraft K3 and solving temperature issues after replacement, by changing fans with other compatible ones.

Cavity is often required at a busy site to not only prevent its receiver from being overloaded by off-frequency signals, but also be a good neighbour and prevent low-level signals from your transmitter from getting into other users receivers - not to mention the preventing of those other signal from getting back into your transmitter to generate spurious signals in its own right.

Online log for FT8WW Crozet Island DX Pedition 2022

A collection of QSL cards from and old operator, Art J. Cook, VE4KZ, who lived in Calgary Alberta, that contained some from the far north of Canada.

Modifying the ICOM IC-756 Standard (non-Pro model) for 60m takes a little work, but it is worth the effort.

This article on basic antenna theory explains why is a 5/8 wavelength vertical antenna better than a 1/4 wavelength antenna

This blog chronicles the development of an 80-meter vertical antenna for amateur radio operation. The author constructs a top-loaded vertical using fiberglass poles, achieving significant performance improvements over their previous end-fed wire antenna. Comparative testing using the Reverse Beacon Network and on-air contacts demonstrates 8-10 dB gain on the east coast. The project evolved to include 40-meter capability through a modified design featuring a four-wire vertical cage, loading coil, and strategic guying system. Despite challenges with signal wobble during windy conditions, the vertical consistently outperforms the end-fed wire, particularly for reaching distant stations during nighttime propagation.

There are many feed systems used in yagis over the years. Gamma matches are not as common as they once were. More typical are beta matches and T matches to convert the low impedance of a yagi to 50 ohm.

Homebrew a 9:1 transformer and measurement for testing purposes with a miniVNA

Learn how to set up a vertical HF antenna with 5 bands and a quarter wavelength. Discover the benefits of using this type of antenna for ham radio operators looking for a lightweight, compact, and cost-effective solution. Get insights from professional versions like the DX COMMANDER and real-world experiences from other operators. Find out about the MV6 commercial version and its excellent results. Explore different construction methods and receive tips for quick assembly and disassembly. Stay informed with the latest articles and archives on military transmissions and Morse code learning techniques.

Setting up a Lora APRS tracker using the ESP32 Lora32 TTGO-T T-Beam 433/470Mhz Module.

Reviving the spirit of early ham radio experimentation, the CW Flea is a contemporary Morse code transmitter. Utilizing an Arduino Nano, Si5351 clock generator, and innovative design, this open-source project offers simplicity, flexibility, and easy tuning for aspiring radio enthusiasts.

Homemade custom CAT interface cable for the Yaesu FT-817 this article include schematics diagram for the interface and some pictures

The author wants a compact, switchable antenna for 40-meter ham radio. They compare 3 designs: rectangle, short-tipped W6NL, and T-hat. All work well electrically, but mechanics matter for a large antenna. The rectangle needs strong support, while the T-hat is sturdier with slightly longer elements. The T-hat design wins for now, but the author will focus on its mechanical details next.

Amateur radio blog about Homebrew equipment,ham radio antennas, satellites, QO-100 operations, rf amplifiers, 2m ldmos amplifier, 70cm ldmos amplifier, 23cm ldmos amplifier

a 20M quarter-wave vertical antenna with a 6m telescopic mast, 1:1 balun, and spiral-wound driven element. Designed for QRP at 14.285 MHz, the antenna’s performance exceeded expectations, delivering low SWR and surprisingly quiet reception. Initial testing yielded successful contacts with European stations and EC1KR, showcasing its effectiveness. Compact and easy to deploy, the antenna promises to be an excellent portable solution for future hilltop operations.

Receiving NOAA weather satellite images using a Raspberry PI with a RTL dongle and a Turnstile crossed dipole automatically.

It is very worthwhile to understand how Beverages of all types work. Without that understanding it can be quite difficult to interpret what you hear and what you measure.

This is basic instructions for homemade 4G Antenna working on 2600 MHz UMTS featuring 13 14 dBi gain. This antenna is desigend to resonate on microwave frequencies in two segments from 2500 to 2570 MHz for Uplink, and from 2620 to 2690 MHz for Downlink.

FTDX-9000MP + HDSDR + Ham Radio Deluxe. An IF Based Direct Sampling Panoramic Adapter for the Yaesu FTDX-9000

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.

There are few equipment for the 4m band, so to get on the band it could be necessary to design and build a simple transverter.

Cheap and easy to build digital modes USB interface for Ham Radio. The DuinoVOX Arduino powered digital modes USB interface for ham radio.

Discover the success story of creating a 4-meter Delta Loop antenna, ideal for improving radio communication. This horizontally polarized antenna offers efficient performance when mounted at VHF heights, catering to both HF and VHF characteristics. A simple, DIY project suitable for portable setups, providing versatile options for radio enthusiasts.

H40WA online log seatch and OQRS by M0URX

A review from a common ham radio operator, using the Yaesu FTdx101D series transceiver

The article discusses running multiple instances of WSJT-X on a Windows PC, allowing users to manage and monitor multiple radios or data streams simultaneously. It explains how to set up additional WSJT-X instances, particularly for users with radios like the IC-9700, enabling monitoring of different bands or sub-bands. The setup process involves creating shortcuts, modifying properties to specify unique rig names, and ensuring the sound card supports dual-channel audio for simultaneous decoding. It also highlights potential issues related to processing power when running multiple instances and using several displays.

T32TT East Kiribati, Christmas Island Log Search provided by clublog. This is 2 man activity from 6m to 160m

Dx-peditions365 let you follow the main DX-peditions on a dedicated calendar page that shows the schedule of all monthly expeditions, running dxpeditions and even shows the dxpeditions reported on their users logs or cluster spots. App available on apple iOS and Android.

Log search function for the XX9D DX Pedition to Macao

The ICOM IC-705 remains a standout portable transceiver after 3.5 years of use. Its unmatched feature set includes multi-band/mode support, built-in WiFi, GPS, remote operation, and excellent third-party app integration, making it versatile and user-friendly. Despite competition like the Elecraft KX3 and Yaesu FT818, the IC-705 excels in flexibility, durability, and ease of use. Whether for QRP operations, digital modes, or SSB, it delivers exceptional performance in diverse settings, reaffirming its status as the best portable transceiver on the market.

This guide explores the captivating hobby of shortwave listening (SWL), offering insights for beginners and enthusiasts alike. It covers key shortwave broadcast bands, essential tools like antennas and receivers, and practical tips to enhance listening experiences. Recommendations include budget-friendly SDR receivers, traditional radios like the TECSUN PL-680, and antennas suited for various environments. Additional resources, such as the World Radio & TV Handbook and online tools like Short-Wave.Info, are highlighted to help identify signals and maximize the enjoyment of SWL.

Explore the design and testing of a cage dipole antenna for 6 meters. Through innovative construction, witness a remarkable 77% increase in bandwidth and improved impedance characteristics.

This article discusses the potential for solar power systems to coexist harmoniously with amateur radio, challenging the notion that they are inherently incompatible. Drawing from personal experience, the author emphasizes the importance of selecting RF-quiet components, focusing on series-string Sunny Boy grid-tie inverters. The article also highlights considerations for system design and limitations based on roof orientation, shading, and array size. Overall, it presents a valuable perspective on creating a radio-friendly solar PV setup.

A C-Pole Antenna for QRPxpeditions describes a DIY C-Pole antenna designed for QRP (low-power) expeditions, inspired by KF2YN’s ground-independent vertical model. After adjustments, it achieved a 1:1 SWR at 14.060 MHz, rising to 2.5:1 at 14.35 MHz. A choke balun, comprising 15 turns of RG8X around a 4” can, was essential for optimal performance. Compact and self-supporting, the antenna enables reliable communication with minimal setup. Contacts included stations across the U.S., and even a 4,600-mile connection to Spain using only 5 watts.

An owners point of view about the ICOM IC-7100 HF, 6M, 4M, 2M & 70cm transceiver

Homemade portable transceiver for the 40 meters band.

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.

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

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.

A voice keyer for Morse Code written for Arduino

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.

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

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.