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

RST amateur radio club in Brazil

Amateur radio of clarion inc. an organization committed to emergency communications and the advancemet of amateur radio.

The Greenwood Amateur Radio Society consists of a group of people who share a common interest in Amateur Radio. Our goal is to further the exchange of information and cooperation between members, to deepen our radio knowledge, improve our operating skills, and to advance the general interest and welfare of Amateur Radio in our community

A compleete guide to program the Tytera MD-380 DMR, installing the TYT software, setting the DMR ID and adding the contacts.

SAARA is an association of radio amateurs organized for the promotion of Amateur Radio communication and experimentation. We provide communications during disasters, emergencies and community events

UMASS Amateur Radio Club

Constructing an End-Fed Half-Wave (EFHW) antenna offers a practical solution for HF operators seeking a multiband wire antenna without the need for extensive radial systems. This design typically employs a high-impedance transformer at the feed point, matching the antenna's inherent high impedance to a 50-ohm coaxial feedline. The article specifically details a 2012 approach, focusing on a transformer with a 49:1 turns ratio, which is a common configuration for EFHW antennas. The resource outlines the construction of a wire element cut for a half-wavelength on the lowest desired band, with specific coil arrangements enabling operation on harmonically related bands such as 40m, 20m, and 10m. It discusses the physical dimensions and winding details for the matching transformer, often utilizing a ferrite toroid core to achieve the necessary impedance transformation. The content provides insights into the operational principles and practical considerations for deploying such an antenna, including methods for tuning and optimizing performance across multiple amateur radio bands. While acknowledging that the presented information from 2012 may be superseded by newer insights, it serves as a foundational reference for understanding EFHW antenna theory and construction.

CCARS. The NEW Face of Amateur Radio in Cleveland County.

Map and list of amateur radio Repeaters in Ukraine in Russian

Vox recorder is activated by voice and sounds exceeding a threshold. It saves for every record a .caf file that you can play, delete or send by email. Useful for surveillance records, hamradio scanners, and many many other applications. You'll be surprised to hear what happens in an all night using Vox recorder.

During the night, radio waves can travel a little farther up reaching the F1 layer, offering chances to lister AM Stations that are impossible to hear during the day. Learn more on sky-wave propagation on this article

Transmitting operations in the 50-54 MHz range offer some unique problems that over the past 50 years have stymied station owners, forcing them to tolerate quiet hours and hostility from family and neighbors attempting to enjoy other electronic services.

Amateur radio daler for Cushcraft Heil Sound, Hustler Kenwood Yaesu SGC amateur radio products in South Africa

offers Rack Mountable DC Power Supplies, OEM Power Supplies, and Communication Series Desktop Power Supplies for a wide range of uses, including powering radio equipment.

The Internet Home of Amateur Radio Station WA5ICA Adventures with low power and a lower budget

Xggcomms specialise in producing cost effective, high quality CAT and Audio interfaces for Icom and Yaesu Amateur Radio Equipment. Our interfaces are fully compatible with a large range of CAT and Digital Mode control software.

Working ham radio microwaves experience by KM0T

Ham radio and electronics radio blog from India

Highlights the PRO CW CLUB's mission to foster the art of telegraphy, a fundamental skill in amateur radio. The club actively encourages members to engage in CW operation, emphasizing its historical significance and continued relevance in modern ham radio communications. Members participate in various activities designed to improve their Morse code proficiency and on-air operating techniques. The club's focus extends to supporting new operators in mastering CW, providing resources and mentorship to help them achieve comfortable speeds and accurate copy. This dedication ensures that the legacy of _telegraphy_ endures within the amateur community, connecting hams across continents with the simplicity and effectiveness of dots and dashes. The PRO CW CLUB serves as a hub for CW enthusiasts, promoting regular on-air activity and camaraderie among its members, who span the globe.

A top band shortened vertical antenna project. This project includes drawing and MMANA-GAL output screens.

The CQ WPX Contest website provides information about the international contest based on working all prefixes, with details on dates, rules, results, log submissions, online certificates, and log checking reports. Users can also access a searchable score database, rules FAQ, and follow updates on the blog and social media. The site is a valuable resource for amateur radio operators participating in the WPX Contest.

Italian ham radio swap site for transceivers, test equipment and manuals

This utility will convert any amateur radio logbook that has been stored in Microsoft Access MDB format and convert the file into either a delimited CSV file or to an ADIF formatted file

Amateur radio speakers for modern amateur radio transceivers

Two Rivers Amateur Radio Club of McKeesport Pa

Ham radio projects and experiments by AG1LE

Introduction to ham radio with nice selected pictures and amateur radio history by VK5SW

In collaboration with Croatian Amateur Radio Association

Novi, MI

Two-way radio communications, amateur radio, cb radio shop based in Madrid Spain

an overview, introduction or tutorial about the basics of electronics filters including the types of filter and the various filter design considerations and parameters

Stillwater, OK

Home of QSO the ham radio interview and talk show!

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

Demonstrates the online presence of the West Island Amateur Radio Club (WIARC), a Canadian amateur radio organization. The resource presents fundamental club information, including contact details via an "info" email address. It also indicates the club's location within Quebec, Canada, and its focus on **ham radio** activities. The site's technical implementation notes its creation with **Arachnophilia 4.0**, a specific HTML editor. This resource, while minimal in content, serves as a digital point of contact for the WIARC. It confirms the club's existence and provides a channel for inquiries, which is typical for many local amateur radio clubs. The mention of a frame-compliant browser suggests an older web design, common for sites maintained over several years.

What do Hams do? by Victor Amateur Radio Association

GARS official web site. Our club is for those with an interest in Amateur Radio and Shortwave Listening in the Grimsby and Cleethorpes areas of North East Lincolnshire.

The Newport County Radio Club (NCRC) serves as a central hub for amateur radio operators in Rhode Island, providing resources and activities for its members. The club maintains and operates two repeaters, W1SYE and W1AAD, which are critical infrastructure for local communications and emergency preparedness. These repeaters support various modes and are widely utilized by the amateur community for daily contacts and organized nets. The club's activities encompass a range of interests within the hobby, from general operating to specific technical pursuits. It offers opportunities for hams to engage in field operations, participate in contests, and develop their technical skills through shared knowledge and experience. The NCRC fosters a community environment where members can collaborate on projects and enhance their understanding of radio science. Membership provides access to club resources and participation in events, reinforcing the local amateur radio presence.

DataBridge wireless RF modem modules facilitate point-to-point data transmission, supporting analog, digital, and serial RS232 UART signals. These modules are engineered for robust wireless communication, offering a reliable solution for various industrial and amateur radio applications requiring secure data links. The product line includes specific models designed for different frequency ranges and power outputs, ensuring compatibility with diverse operational requirements. Each module integrates advanced RF technology to maintain signal integrity over distance, crucial for remote monitoring and control systems. The design emphasizes ease of integration, allowing users to quickly deploy wireless data links without extensive configuration. Key features encompass low power consumption and a compact form factor, making them suitable for embedded systems and portable devices.

Ham Radio Club in Andorra

Ham amateur radio club experimenters repeater vhf contest indianapolis, carmel indiana, irlp ice D-Star

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

Associazione Radioamatori Repubblica di San Marino

RCARS has been formed to be a non-profit corporation dedicated to the safety and welfare of the citizens of Robeson County in times of emergency, disaster or other communications breakdown or overload.

Station QRP presents various **circuit diagrams** for constructing low-power AM vacuum tube shortwave transmitters, catering to enthusiasts interested in vintage radio technology. The resource details schematics ranging from simple to more complex designs, enabling hams to build their own QRP AM transmitters for operation on frequencies like 6.925 kHz AM. It emphasizes the use of vacuum tubes, providing a technical foundation for understanding and replicating classic shortwave broadcasting methods. The content is geared towards those who enjoy the hands-on aspect of electronics and the unique characteristics of tube-based RF circuits. Building these transmitters allows operators to experience the nostalgia of early shortwave radio, with the site specifically mentioning a pioneer station on 6.925 kHz AM. The designs facilitate experimentation with low-power AM transmission, offering practical application for homebrew projects. The focus on QRP (low power) operation aligns with a segment of the amateur radio community that values efficiency and minimalist setups, providing a distinct alternative to modern solid-state transceivers.

Amateur radio accessories, like the CT-17B ICOM CI-V hubs, IABs ICOM ACC1 Breakout boxes, GS232Dunio GS232A/B arduino based rotor controler, IMK memory keypad for ICOM Radios