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This page provides a calculator to determine the total line loss and additional line loss in your transmission line based on the level of SWR. It helps hams understand the impact of high SWR on transmission line losses. The calculator allows users to input their SWR level and get accurate calculations of total losses. This tool is useful for ham radio operators looking to optimize their transmission setups and improve overall efficiency.

The Valley Radio Club of Oregon (formerly Valley Radio Club of Eugene), located in Eugene, Oregon, was chartered in 1929, and is one of the oldest continuously operated club stations in the United States. It has been affiliated with the American Radio Relay League (ARRL) since 1932, and associated with the American Red Cross since 1951.

The 52 Week Ham Radio Challenge offers hams a year-long series of 52 challenges to test and improve their skills. Created by Fabian Kurz, DJ5CW, this project includes bonus challenges that can be substituted for missed or failed tasks. The challenges cover a range of topics and activities related to ham radio operation, providing a fun and educational way for hams to enhance their knowledge and expertise. Whether you are a beginner or an experienced operator, this challenge is designed to engage and motivate ham radio enthusiasts throughout the year.

A podcast dedicated to the technical aspects of amateur radio, featuring in-depth discussions on homebrewing, test equipment, and project building.

The author discusses ways to display VHF and higher bands using a K3/10 as  transverter, NooElec Upconverter, SDR, and SDR-Console. He observed that the results were remarkable, with the tuned frequency visible at +/-100kHz. The K3 Interface Option (KXV3A) produces a buffered IF output at 8.213MHz, which is received using a NooElec NESDR SMArt SDR dongle and Ham It UP Upconverter. The SDR-Console program is utilized, with Omnirig synchronizing the SDR and K3. To configure the system, particular parameters are required, such as adjusting the IF frequency to 133.213MHz (125MHz + IF frequency) and inverting the spectrum. The Panadapter demonstrated ES activity at 10m, and modest software tweaks may be required for improved performance.

The Parks on the Air website is dedicated to international portable amateur radio operations from national/federal and state/provincial parks. It provides rules, guides, and resources for ham radio operators looking to participate in emergency awareness and communications. The site also offers a book exploring the process of park activations and hunting for those activations, with advice and motivation from experienced operators. Visitors can make contributions to support the site's overhead costs and keep it ad-free. The site is a valuable resource for hams interested in getting active in the growing POTA community.

This logbook program allows individual configuration and input masks for participating in HF and VHF/UHF contests. It also supports export options for EDI, ADIF, and Cabrillo formats. Get the latest version 1.0.1.0 of QW5 Lizard for Windows, including updates for the Holzhammer Contest 2019. Enhance your contest logging experience with this versatile tool.

Terrestrial Amateur Radio Packet Network An ever expanding group of Amateur Radio operators are working together to use many VHF/UHF radios to link multiple ham radio stations in a digital network for the purpose of having fun in a fun, educational, hobbyist-controlled environment, built using ham radio infrastructure based on packet radio technology.

The FF-501DX LPF, a high-performance VHF and 10m filter, was obtained at a friend's SK sale. After becoming more active on 10m, the author reexamined the LPF and discovered it to be of high quality. The filter's efficiency was outstanding and the return loss/VSWR was better than estimated. The LPF was connected to a Bird 50R dummy load to evaluate insert loss, cutoff, attenuation over 70MHz, and return loss. The original specifications were found in an old radio magazine, along with a link to the original one-page information sheet. Comparing the results to the original specs confirms the LPF's quality.

A modern, free online study tool for US amateur radio exams. It provides current NCVEC question pools for all license classes (Technician, General, and Extra). Features include a smart practice mode that tracks your weak areas and provides detailed explanations to help you pass faster.

The Northland Antique Radio Club is located in Minneapolis, Minnesota. We were founded in 1986. We have multiple indoor and outdoor events. Our main events are an auction and outdoor swap meet in May and an indoor swap meet in October each year. We also have a technical program in February.

The Playground Amateur Radio Club has be in service to the Northwest Florida Panhandle since 1951. The team in Fort Walton Beach Florida sponsors and hosts multiple events, contests, Hamfests, Swapmeets, meetings, nets and technical instruction and assistance.

Join Thomas (K4SWL) as he shares his experience activating a POTA site using the Elecraft KX2 AX1 combo. Follow along on his journey from a podcast recording session to a quick POTA activation, showcasing the ease and efficiency of this portable setup. Discover the joy of getting on the air with minimal setup time and maximum enjoyment, perfect for hams looking for a grab-and-go solution. Learn about the benefits of using the AX1 antenna and how it can enhance your portable operations, all while supporting QRPer.com through affiliate links.

Encourages and promotes DX communications activity on the HF amateur bands.

Learn how to connect your AllStar Node to 44Net in this blog post. Discover step-by-step instructions and tips to make the process easier for hams interested in expanding their networks. Find out how to improve your communication capabilities and enhance your overall ham radio experience with this helpful guide.

This page presents the K4 S-Meter Recorder, a tool designed for the Elecraft K4 radio by hams. The tool collects S-Meter readings and saves them to a CSV file, allowing users to create graphs of RFI over time. These graphs are valuable during RFI hunting, aiding in pinpointing the source. Visitors can view the program's interface, download it at their own risk, and subscribe to the blog for updates. The page provides insights into the K4 S-Meter Recorder's functionality and usage for ham radio operators seeking to manage RFI effectively.

Mid Sussex ARS is an RSGB-affiliated club and meets at its headquarters in Burgess Hill on the 2nd and 4th Friday of each month. They organize various activities ranging from talks by members or guest speakers, evenings on the air using their shack's latest SDR equipment, training evenings and used equipment sales. As well as scheduled club nights, they run many outdoor activities throughout the year, including direction-finding contests, town days, social evenings and Special Event Stations. They even have their own free online training academy!

The Oxley Region Amateur Radio Club (ORARC) provides encouragement for those interested in the scientific development of radio communications and associated electronics. VK2 Mid North Coast Australia

The Colorado QSO Party website provides information about the annual on-air amateur radio event in Colorado. Participants can make contacts with stations in all 64 counties of Colorado, with no pressure to achieve a specific number of contacts. The site encourages participation from POTA and SOTA operators, offering the opportunity to double-dip and earn bonus points for activating a park during the event.

Gordon West Radio School provides comprehensive study materials including books, audio courses, and practice exams. "Gordo" is renowned for his ability to explain complex concepts in memorable ways, often using humor and mnemonics. His materials include insider tips from his decades of teaching experience and administering exams. The audio courses are especially popular among commuters who can study while driving. The site offers package deals combining different media formats for various learning styles.

The Nassau Amateur Radio Club (NARC), a Special Service Club of the ARRL, focuses on Ham Radio education to train skilled radio operators for emergency communications, foster international goodwill, and advance the radio art. Based in Nassau County on Long Island, the club is affiliated with the New York City-Long Island Section of the ARRL Hudson Division.

Learn about the guidelines and regulations for amateur radio operators participating in Jamboree-on-the-Air (JOTA). This event is a great opportunity to introduce Scouts to the world of ham radio, with some potentially pursuing a lifelong hobby or even a career in science and technology. Get information on licensing regulations, operating rules, suggested frequencies, and third-party agreements with other countries. Consult the American Radio Relay League for more details and make sure to comply with FCC regulations to ensure a smooth and enjoyable experience for all participants.

Emergency Radio Long Island (ERLI) in Bellmore, NY, provides amateur radio emergency communication training and operations. Services include POCSAG/DAPNET paging, APRS iGate/Digipeater/weather station, and an APRS Text Net for emergency notifications. ERLI supports multiple digital and RF modes, hosts weekly nets, and rebroadcasts weather, safety, and public alerts. Resources cover SkyWarn, AUXCOMM, FEMA, and digital radio tools. Pagers operate on 439.9875 MHz with specific rubrics for alerts. APRS messages, bulletins, and beacons help coordinate emergency response among licensed amateur radio operators, maintaining readiness for regional emergencies and severe weather events.

Parks on the Air Canada page provides information about the popular Amateur Radio activity that involves operating portable radios from designated parks and nature reserves worldwide. The page presents the objectives of the program, lists over 400 national/provincial/territorial parks, and offers insights from Tracy McKim, VE3TWM, on low power communications and outdoor ham radio operation. It also includes links to YouTube channels with how-to videos on setting up portable stations, Field Day deployment, and POTA activation. Amateur radio operators interested in combining their love for radio with outdoor adventures will find valuable resources and learning opportunities on this page.

Remote control software for an icom 9700 focused on satellite communication and ease of use. It's got lots of features, but some standout features include full duplex doppler control by Gpredict or SatPC32, integration with the RC-28 controller and callsign lookup/logging within the app.

The Schoharie County Amateur Radio Association (SCARA) was established by a group of Schoharie County amateurs, along with a few from just over the County line in 1946. That date is based on the best we can find from old club records and recall of conversations with some of the original group, now all SK.

The Young Ladies' Radio League, also known as YLRL, is an organization founded by women in 1939 with the goal of connecting and supporting female ham radio operators worldwide. From beginner classes to scholarships, YLRL offers resources and a community for women of all ages and backgrounds interested in ham radio. The website provides information on membership, upcoming events, and helpful tips for renewing licenses and getting on the air. Whether you're a seasoned ham or just starting out, YLRL is dedicated to empowering and supporting women in the world of amateur radio.

Bear Bait Radio Club is dedicated to educating new ham radio enthusiasts while having fun. We emphasize emergency preparedness, community service, storm watching/reporting, and wilderness search and rescue.

The Easton Amateur Radio Society (EARS), founded in January 1965, supports Amateur Radio operators on Maryland's Eastern Shore by promoting knowledge sharing, training, community service, and fellowship.

With the reputation of being the most active amateur radio club in Hampshire, we support enthusiasts, experienced and new, with monthly meetings and summer field events. Free to visit!

W4EEY offers specialized preparation materials focused on the mathematics and electronics theory portions of ham exams. Their approach breaks down complex formulas into step-by-step processes, making them accessible even to those without strong math backgrounds. The site includes calculators for common ham radio formulas, interactive circuit diagrams, and in-depth explanations of electronic principles. Their materials are particularly valuable for the Amateur Extra exam, where technical content becomes more challenging.

For sale used unwanted HAM and CB Radios for sale in your area. Post your unwanted radio items to others for free.

Ham Radio Prep provides straightforward, beginner-friendly courses for Technician, General, and Amateur Extra license preparation. Their teaching style focuses on plain English explanations rather than technical jargon, making concepts accessible to newcomers. The site offers video lessons, practice exams, and a community forum where students can ask questions. Their guarantee promises a pass on your first attempt or your money back, and they maintain a high success rate among students.

RARS: Raleigh Amateur Radio Society meets monthly and has several regularly scheduled non-meetings. RARS has several repeaters, a large hamfest, field day participation, and many other activities.

The East Pasco Amateur Radio Society is located in Dade City, Florida and also serves the eastern Pasco communities of Lacoochee, Saint Leo, San Antonio, Wesley Chapel, Zephyrhills as well as communities outside Pasco County like Brooksville and North Tampa.

The GOTAhams Amateur Radio Club offers a welcoming environment for anyone interested in ham radio, from complete beginners to seasoned operators. They host various activities like park outings, license testing sessions, and nets, fostering a hands-on learning experience. They emphasize inclusivity with diverse member interests and ages. If you're curious about ham radio, the GOTAhams seem like a friendly club to check out.

Tamiami Amateur Radio Club website provides information on club activities, membership, FCC license testing, special events, and participation in ARRL Field Day and Florida QSO Party. It also includes details on DMR technology and VE testing sessions. The club has been affiliated with ARRL since 1963 and operates a special event station at the Venice Shark's Tooth Festival annually.

We are excited to share the news about the inaugural URC DX RTTY Contest, organized by the Unicom Radio Club! We would greatly appreciate your support in spreading the word within the RTTY community.

Service devoted to vacuum tube testing for HIFI, guitar, and vintage radio applications. Western Glow Tube Service offer a vintage radio repair service, they consider radio services more as a kind of tune-up, not a tradional repair service or restoration, although Level 3 is a nearly full restoration. Our services are geared toward radios that are mostly functional and not missing any significant parts except tubes.

Home of the Chester & District Radio Society. We meet weekly throughout the year with a full programme of lectures/events and activities. Our call is G5CH

official website for DLARC. operates the W3OK repeater, offers license classes and tests, a net, assistance in ARES and RACES nets and activities, and participation in ARRL activities and competitions.

The Lancaster & Fairfield County Amateur Radio Club is a general interest amateur radio group that offers monthly licensing exams, emergency communication activities, and social gatherings. They meet on the first Saturday of each month at 10:00 am at the Fairfield County Emergency Management and Homeland Security in Lancaster, Ohio. Meetings are public and welcome anyone interested in amateur radio, electronics, and emergency communications.

Maltby & District Amateur Radio Society based in South Yorkshire England

The York County Amateur Radio Club (YCARC) in Maine, USA, promotes amateur radio knowledge and camaraderie. The site features club information, activities, and upcoming events for radio enthusiasts.

The CB Radio Club is a large community site with a forum, groups, reviews, free classifieds, and more.

GMRS frequencies chart for the GMRS band; GMRS Repeater info, GMRS license info, and much more!

Radio classifieds, technical articles, reviews and antenna designs for CB and Amateur bands.

Kilo Lima Radio Club is a global amateur radio community uniting operators across bands and borders.

The website of the Radio Museum of Thessaloniki, containing historical details of the radio history in Greece, including pictures of radio pioneers and also antique radio tuners available in Greece

John Rider tube radio schematics and manuals