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Approximately 524,475 Brazilian amateur radio operators are cataloged within this resource, offering a comprehensive database for the South American region. Each entry includes geographical coordinates, enabling users to visualize station locations directly within Google Earth. This functionality supports DXers in identifying potential contacts and understanding propagation paths relative to specific Brazilian QTHs. The platform serves as a digital callbook, primarily focused on the Brazilian amateur radio community. It facilitates the lookup of callsigns and associated location data, which is crucial for award tracking, contest planning, and general operational awareness. The integration with mapping services provides a visual dimension to traditional callsign databases, enhancing the utility for operators interested in geographical aspects of radio communication.

**Low SWR Podcast** was a dedicated platform for amateur radio enthusiasts, produced by Rich, **K0EB**, and his son Brady, **AC0XR**. The podcast covered a range of topics relevant to the ham radio community, including technical discussions, DXing, and radio news. Episodes were crafted to engage both seasoned operators and those new to the hobby, providing insights into the evolving landscape of amateur radio. Despite its cessation in 2014, the podcast remains a testament to the dynamic nature of ham radio, reflecting the changing interests and priorities of its creators. The podcast's archive offers a valuable snapshot of amateur radio discourse during its active years. While no new episodes have been produced since 2014, the existing content continues to serve as a resource for understanding past trends and discussions within the community. The podcast's focus on technical content and real-world applications made it a useful tool for operators seeking to enhance their knowledge and skills. Although inactive, the Low SWR Podcast's legacy persists, highlighting the enduring appeal and educational value of amateur radio media.

The P4 Aruba Callbook, last updated in 2010, serves as a directory for amateur radio operators active from the Caribbean island of Aruba. It meticulously categorizes P4 callsigns into several types: **P41-** for special resident calls valid for one month, **P43-** for permanent resident calls renewable annually, **P49-** for permanent visitor calls also renewable annually, and **P40-** for temporary visitor calls valid for one month, often used in contests. The resource notes that obtaining a permanent visitor callsign requires passing a local examination. The callbook lists numerous specific callsigns, including their QSL routes, operator names, and sometimes addresses or activation dates. For instance, P41A routes via P43A, and P40HQ was used by P43ARC via I2MQP for IARU contests. The entries include both active and Silent Key (SK) operators, with dates of passing where known, such as P43ADA (SK, Sep 2014) and P43JB (SK Jan 2012). This detailed listing assists DXers and contesters in verifying contacts and ensuring proper QSLing for Aruba operations.

From 1921 to 1924, radio amateurs experimented with transmitting across the Atlantic. Everyday Engineering magazine organized the first sending test with English amateurs prepared to listen for signals from the US

Serving Northwest Ohio Since 1954

A six meter band Marathon managed by ARI Firenze, a 4 month marathon for itailan radio amateurs.

The Saratoga Amateur Radio Association provides emergency communications for the City of Saratoga, and promotes amateur radio in the community.

A world-class amateur radio contesting club, is represented by two chapters in North Carolina and extends as far north as Pennsylvania and Delaware.

An incorporated, non-profit organization promoting amateur radio and serving the interests of communities in Bonner County.

My view on the world of AMATEUR RADIO- "Rambling on" so to speak

Home page for the grand rapids amateur radio association web site

By Amateur (Ham) Radio Club in Sacramento California

The original SurplusEQ.com domain, once a hub for amateur radio operators and electronics enthusiasts seeking test equipment, meters, and various high-tech components, has been repurposed. Historically, such platforms facilitated the acquisition of essential gear for shack setups, antenna analysis, and general electronics work, often providing cost-effective alternatives to new retail purchases. The site's previous focus on "test equipment, meters, testers" directly supported the technical aspects of the hobby, from RF measurements to circuit diagnostics. Currently, the domain points to a gambling platform named "SEMUTWIN," offering online slot games, live casino options, and other digital wagering activities. This shift represents a complete departure from its former identity as a resource for surplus electronics and amateur radio-related equipment. The content now features game titles like "Sweet Bonanza Super Scatter" and "Gates of Olympus Super Scatter," alongside promotional offers for online gaming.

AMRAD is the Portuguese Association of Amateur Radio for Education Research and Development

k5eok Edmond Amateur Radio Society

Southern Oklahoma Amateur Radio Emergency Service and Scientific Society. We are a diverse group, with a history of community service to the southern Oklahoma region

Founded In 1938, The W.A.R.A. Has Been An Anchor For Amateur Radio Enthusiast Throughout North East Ohio.

Home of the Arctic Amateur Radio Club

The purpose of the Marconi Amateur Wireless Society is to encourage experimentation in all aspects of amateur radio in a spirit of friendship and goodwill.

Presents the personal amateur radio presence of W2CZ Efrem, offering a glimpse into their engagement with the hobby. The page serves as a digital QSL card, affirming participation in the global amateur radio community. It provides a direct connection to the operator, typical of early personal web pages in amateur radio. This resource functions as a static online identifier for the callsign holder.

The Japan Amateur Radio League (JARL) is cautiously watching new developments concerning the commercialization of Power Line Communications (PLC), while continuing to carry out joint experiments with a high speed power line communication promoters' alliance to reduce potential interference to radio communications.

Pawnee Amateur Radio Club Columbus Nebraska

Using a simple calculation, measure the distance between Earth and the Moon with the help of a local amateur radio station

The Brandon Amateur Radio Society serves the ham radio community in eastern Hillsborough County Florida.

RARA was founded in 1995 by a group of active amateur radio operators from several regions of the United States. Today, the club is international in scope with over 135 members around the world.

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

The Madera County Amateur Radio Club was formed for public service, education, scientific and recreational purposes of amateur radio and to elevate the standards of operating practices and ethics in amateur radio communications. San Joacquin Valley California

Ham Radio Ads from France by F1UFY

Producers of custom name tags, luggage tags, club badges, Employee Name Tags, Special Event Badges, but also Comtech Amateur Radio Television Transmitters and Receivers D480 filters, Video cameras and accessories.

Amateur radio, Technology, Towers, Land, Wilderness, real estate, Visalia DX Convention Report #1 Flexradio Antennas Dxpedition, Elecraft introduces K3, here are pictures of the radio from the outside and inside from the Visalia DX Convention

Radio Amateurs of Greater Syracuse is an organization involved in promoting public service, fellowship, and ham radio in general, in the Syracuse, NY area. This site provides information, news and events of interest to hams in Central New York.

Mike's amateur radio blog from Rhodes Island ,Dodecanese, Greece

Group of Amateur Radio operators, generally from the Yavapai County area in Arizona, who share common interests, goals, and aspirations.

G8YMM Amateur radio web site with interest on ATV

Hall County ARES - The Hall County Amateur Radio Emergency Service has been organized to aid the public of Hall County and surrounding communities.

Thoughts build a solid state legal-limit amplifier for amateur radio use.

radio.McDougallsHome.net The Web site and Blog of Amateur Radio Station K7JM. Homebrew, Construction, Operating, and Discussion

Lone Star Amateur Radio Association

The Southeastern VHF Society (SVHFS) is a not-for-profit organization incorporated to promote amateur radio operation on the bands above 50 MHz in the southeastern United States.

CCARS - Camden County Amateur Radio Society. Supporting the Department of Homeland Security's Emergency Communications Initiative while promoting Amateur Radio activity and fellowship in and around Camden County Georgia

Dundalk Amateur Radio Society. Ireland Calsigns EI7DAR EI0W

Pine Valley Repeater Amateur Radio Club Richland County ARES/RACES Serving Richland County with Sky warn Storm spotters and communications were needed. Working with Emergency Management and other emergency services.

Daki Funkversand is a German based web shop for Amateur- & CB-Radio equipment. Our shop includes products such as radios, antennas, equipment, PMR, LPD & Freenet.

The elgin amateur radio society Illinois

Developing operational amateur radio equipment for the 134 GHz band presents significant technical challenges, particularly in frequency generation and stability. This resource details the construction of a 134 GHz system, outlining its architecture with separate transmit (Tx) and receive (Rx) modules, each employing a local oscillator (LO) and RF head units. The system utilizes a dual Flann 50 GHz lens-type horn antenna configuration for optimal signal coupling. The transmit path incorporates an LMX2541 synthesizer chip operating at approximately 2.8 GHz, referenced by a 10 MHz double-oven Morion OCXO for exceptional stability. This signal is multiplied through a series of stages (X4, then X2) to generate a 22.4 GHz signal, which subsequently drives a dual series diode multiplier to produce the final X6 signal for 134 GHz operation. The receive side features an anti-parallel diode mixer coupled to a 144 MHz transceiver via a preamplifier, ensuring effective downconversion. Operational mode is CW, achieved by keying a multiplier stage. The project includes images of the Tx and Rx head units and describes a successful 3.5 km test with G8ACE, demonstrating stable signal tones due to PLLs locked to OCXOs at both ends, confirming the system's robust performance.