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The Chatham-Kent Amateur Radio Club Online

Article on radio frequency interferences, with a long list of common RFI cause, like Plasma TV, Solar panels inverters, fluorescent tube lamps.

Founded in 1947 in Rochester, NY, the Rochester DX Association is an amateur radio organization dedicated to the art and science of DX operating and contesting.

ANARC web site

An experimental antenna for HF reception. It consists of a single loop element mounted on the ground. It is stealthy, small, and quiet. EZ-NEC plots and on-air test results are included.

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

The OCFD Off-Center-Fed Dipole Antenna is an excellent multiband antenna that is relatively simple to construct, yet gets quite decent performance.

W8TN article on repairing an Alpha 87a power amplifier

A complete guide on using the HF amateur radio bands, and the differences with VHF, using filters, influence of solar weather, the split mode and phonetic alphabets.

This caution applies to all Icom HF transceivers. Based on a discussion with Matt Erickson, KK5DR

A voice keyer with up to 60 seconds memory in total, A CW keyer using the famous N0XAS design, aka Picokeyer and a 4 channel sequencer

Effects of ice an snow in a wire dipole antennas

Carolina's Chapter of the Antique Wireless Association

Useful tips on building cobweb antennas. Since I've done so many posts on the Cobweb antennas I thought it best to separate them on a different page so that potential Cobweb builders can see all the posts together. Hopefully this will make planning and building easier.

A multi-band off centre fed dipole, designed to operate on all bands from 40m (7MHz) to 6m (50MHz). Author claims it will operate on 40, 30, 20, 17, 15, 12 and 10m without an ATU (SWR <3:1) plus 6m with an ATU.

How to setup a band-tracking panoramic signal display to work along to your transceiver.

Direct experience of portable operations of the FT-817 transceiver by Yaesu and the small power amplifier by RM Italy with 300W output

Ham radio transmissions can interfere with television reception. This is called television interference, or ham radio TVI. Consumer adoption of cable television has significantly reduced ham radio TVI. But the introduction of IPTV, or television over phone systems, has brought ham radio TVI back, often with a vengeance. Here's why

The purpose of the TASYLs is to promote fellowship among YLs, who share a common bond of Amateur Radio.

The Renfrew County Amateur Radio Club is located in the County of Renfrew in the province of Ontario, Canada.

The club is based in State College, Centre County, Pennsylvania, the geographic center of the Commonwealth, in the middle of the Allegheny Mountains.

The resource, "Conventional Use of Transmission Line," meticulously details the operational principles of transmission lines, emphasizing the Transverse Electromagnetic (TEM) mode of energy transfer. It clarifies that for a line to function purely as a transmission line, all currents must be confined internally, with external fields ideally zero. The discussion differentiates between balanced and unbalanced lines, asserting that while both require equal and opposite currents within the conductors, the key distinction lies in the voltage relationship of each conductor to the surrounding environment. It highlights that a good antenna pattern does not inherently confirm proper feeder balance, and that common-mode currents can lead to RF in the shack and increased noise levels, even without pattern distortion. The article further explains that a transmission line can become a radiating conductor if energy is applied in a non-TEM mode, leading to common-mode issues. It cites classic texts like Jordan and Balmain's "_Electromagnetic Waves and Radiating Systems_" and Kraus's "_Antennas_" to support its definitions of TEM mode operation. The content also explores non-transmission line applications of parallel or concentric conductors, such as _coaxial dipoles_ and _folded dipoles_, which intentionally operate in non-TEM modes for antenna functionality. The author, _W8JI_, stresses that simply measuring equal currents is insufficient to confirm a balanced feeder; phase and voltage balance to ground are equally critical.

A computer gaming headset makes a comfortable and economical headset for your elecraft k2 transceiver.

When you get out of the car, strap your D710 to your old HT and continue APRS inside

A source for Information, links and images about the "Northern Lights" on-line since the Web began

Statio evaluation guidelines and rules for correct antenna setup

The PL259/SO239 (aka UHF) connectors have harsh critics and religious defenders. Questionable measurement techniques complicate matters.

The first EME history was written in 1944 when first EME echoes were received on 564 MHz by German Wurzmann radar according to the article by Dr. Ing. W. Stepp.

You do not need an expensive or complicated interface to get started using psk31 and other data modes with an elecraft k2 transceiver.

The ARA provides communications services to the area through its network of repeaters at the club site near Freeland PA

Yaesu FT-7800R dual band 2m/440Mhz mobile radio review

The Mother Lode DX / Contest Club welcomes all interested DXers and contesting fans, both casual and rabid, from throughout the Mother Lode region of California

COTA-RUSSIA Award

Stuff about amateur (ham) radio, with emphasis on VHF/UHF, QRP, portable and mountaintop operating.

Accessible Equipment Manuals, Useful Operating Tips and Techniques and Contesting for the Blind by NU7I

Over 150 pages of content are dedicated to maximizing activity on the 6-meter band, often referred to as the _Magic Band_. The resource details various propagation modes, including sporadic E, F2, and tropospheric ducting, providing insights into their characteristics and how to leverage them for DX contacts. It also covers essential equipment considerations, from transceivers and transverters to specific antenna designs optimized for 50 MHz operation, such as Yagis and Moxon antennas. The eBook presents strategies for participating in 6-meter contests and pursuing awards like _VUCC_, offering practical advice on logging software and operating techniques. It includes discussions on software tools useful for predicting propagation and managing contacts, alongside guidance on finding and utilizing DX maps to identify openings. The author, K5ND, shares his extensive experience to help operators achieve successful 6-meter DXing. Specific sections address the code of practice for 50 MHz operations and provide assistance in locating rare DX opportunities. The content is structured to guide both new and experienced operators through the nuances of the band, from initial setup to advanced operating strategies.

Dedicated to the history of radio broadcasting.

Operate several remotes linked to the Cactus Radio System in southeastern Utah, and Western Colorado, and an Open system in Western Colorado.

G3PHO website dedicated to the microwaves operations

The Great Lakes DX / Contest Club is located in the central part of Michigan near the city of Lansing which is the state capitol. The club's main purpose is to support and encourage the DX aspect of the amateur radio hobby.

Meet The Breakers is a unique exploration of the CB radio culture in the United Kingdom, hosted by Colin The Head. This series delves into the lives of various CB radio enthusiasts, showcasing their setups, stories, and the vibrant community surrounding this hobby. Each episode features interviews with notable figures in the CB world, providing insights into their experiences and the equipment they use. The program not only highlights the technical aspects of CB radio, such as antennas and signal checks, but also captures the personal stories that make this hobby special. From collectors of rare equipment to modern-day users navigating the airwaves, Meet The Breakers offers a comprehensive look at the diverse personalities that contribute to the CB radio landscape in the UK. Whether you're a seasoned operator or new to the scene, this series is a valuable resource for anyone interested in the world of CB radio.

A portable operation experience with a SpiderBeam pole during a contest, testing wire antennas, like dipole and delta loops configurations on 20 40 and 80 meters band.

A close up of Doppler Shift, a phenomenon which is commonly observed by the lay person, yet still confuses many amateur satellite operators.

ARDF IARU Region 1 working group

Paulding county's oldest and largest ham club. Skywarn

This project describes a DIY all band HF SDR transceiver. Built around a Softrock 6.3 kit, it boasts a 20W homebrew amplifier and ATmega168 microcontroller for USB control. An LCD displays frequency, power, and SWR. Automatic LPF selection and SWR protection enhance functionality. Compatible with Rocky and PowerSDR software, this project provides a cost-effective and powerful HF SDR transceiver for hobbyists.

Stuff about amateur (ham) radio, especially VHF/UHF, QRP, portable and mountaintop operating

On December 12, 1901, Guglielmo Marconi successfully received the first transatlantic wireless communication, a Morse code "S" (three dots), at 04:30 GMT. This article details the setup for this groundbreaking experiment, noting Marconi's receiver in St. John’s, Newfoundland, Canada, utilized a _coherer_ and an antenna elevated by balloons and kites. The transmitting station at Poldhu, Cornwall, England, featured twenty-four 200-foot ships' masts and a 25-kilowatt alternator. The resource explains how this contact disproved contemporary beliefs about radio wave limitations due to Earth's curvature, later understood through _ionospheric propagation_. It frames Marconi's achievement as the "very first DX" in amateur radio terms, defining DX as telegraphic shorthand for distance and _DXing_ as the hobby of receiving distant signals. The article also provides external links for further reading on Marconi's experiments and the science behind transatlantic radio signal reception.