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Demonstrates the principles of effective HF multi-band antenna systems, emphasizing the use of non-resonant antennas, understanding line attenuation, and the proper application of transmatches and baluns. The resource challenges prevalent amateur radio myths, such as the necessity of a 1:1 SWR at the antenna feedpoint and the misconception that reflected power is lost or damages equipment. It cites authorities like Jim Fisk (Ham Radio Magazine) and M. Walter Maxwell (W2U, QST's "Another Look At Reflections" series) to support its arguments, providing historical context and technical explanations for these long-held beliefs. The article details how to combine non-resonant antennas with appropriate feedlines and matching devices to achieve broad-band operation. It compares coaxial cable losses with those of balanced open-wire lines, illustrating how ladder line can significantly reduce attenuation and handle higher impedances, enabling an 80-meter dipole to operate effectively across multiple HF bands. Practical guidance is offered on transmatch operation, explaining impedance matching principles and debunking the idea that tuners merely "fool" the transmitter. It also clarifies the function and potential misapplication of baluns, particularly transformer-type baluns, in the presence of high SWR.

A simple free running oscillator oscillating at the receiver\'s IF (intermediate frequency) beats with the incoming signals in either CW or SSB and the resultant audio frequency goes to the AF amplifier.

Is a group who enjoy gathering together to practice the hobby of Amateur Radio.

Approximately 2.8% annual decline in Australian amateur radio licenses was observed over the five years leading up to 2002, a trend that prompted further analysis of the country's amateur population. This resource examines licensing statistics and demographic shifts within the Australian amateur radio community between 1998 and 2007, utilizing available data to identify patterns in license issuance and renewal. The study focuses on **population trends** and the underlying factors contributing to changes in the number of active **amateur radio operators**. It provides insights into the health and growth trajectory of the hobby in Australia during this specific period. Understanding these demographic shifts is crucial for clubs, regulatory bodies, and equipment manufacturers to adapt strategies and foster engagement.

Collection of several Crystal Radio receiver circuits with schematics diagrams and pictures

Conejo Valley Amateur Radio club AA6CV CVARC is an ARRL special service club.

The MSU Amateur Radio Club is a unique student organization within the College of Engineering at MSU

SARA is a volunteer club dedicated to furthering the advancements of Amateur Radio

Welcome to the relay repeater club. we are a 2 meter/vhf amateur (ham) radio club in arcadia, california, operating on the ka6ncr repeater. we are looking for new members.

Unaffiliated amateur radio group based in New Castle, Pennsylvania dedicated to having fun on the HF bands

The QRV.DK platform offers a dedicated **QRZ callsign search engine** specifically tailored for Danish amateur radio operators. It enables users to look up callsigns and ascertain their **Logbook of The World (LoTW)** status, a critical feature for DXers and contesters seeking QSL confirmations. The search functionality facilitates rapid access to operator details within the Danish amateur radio community, streamlining contact verification processes. Beyond callsign lookups, the resource includes a comprehensive repeater list for Denmark, providing essential information for local and regional VHF/UHF operations. This feature supports mobile and portable stations in locating active repeaters, enhancing communication reliability across various bands. The site also curates a collection of ham radio links, serving as a centralized hub for related amateur radio resources.

Ham radio wire antennas are the most common form of antenna used by ham radio operators. Here you can find hints and tips on diy wire antennas

The idea makes use of a very simple direct conversion receiver on the band of interest.

The ARRL Reciprocal Permit page addresses international amateur radio operating privileges, specifically focusing on how a US-issued amateur radio license can be recognized and validated for operation in foreign jurisdictions. It outlines the process for obtaining reciprocal operating permits, which are essential for US hams wishing to transmit legally while abroad, ensuring compliance with local telecommunications regulations. The resource details the specific requirements and agreements between the United States and other nations regarding amateur radio licensing. This information is crucial for DXpeditioners and traveling amateurs to understand the legal framework governing their operations outside their home country. It clarifies which countries have reciprocal agreements or require specific temporary permits, preventing unauthorized transmissions. The page serves as a central point for US licensees to research the necessary steps before embarking on international travel, covering aspects like application procedures and required documentation for foreign operating authorization.

This resource provides fundamental guidelines for optimizing mobile amateur radio antenna installations. It addresses critical factors such as achieving an adequate ground plane, minimizing common mode current, and reducing ignition noise. Specific recommendations include mounting antennas on the vehicle's roof for superior radiation patterns and utilizing proper feedline routing to mitigate RF interference within the vehicle's electrical system. The content details the impact of antenna placement on Standing Wave Ratio (SWR) and overall radiated power, emphasizing the importance of a solid electrical connection to the vehicle chassis. It also discusses strategies for noise suppression, such as bonding body panels and employing ferrite chokes on power leads. The information presented is practical for hams seeking to improve their mobile station's efficiency and reduce RF-related operational issues.

Bangladesh Amateur Radio League. The national level organization for promoting HAM Radio activity in Bangladesh.

Assocation des Radio Amateurs Libanais

A simple charger designed for charging 12 V sealed lead acid batteries, used by radio amateurs for portable operation Amp-Hr Class used by radio amateurs for portable/emergency operation.

York Region Amateur Radio Club, one of Canada's largest

A collection of modifications and improvements to the Ameritron ALS-600 ham radio RF power amplifier

Presents the **BayCom** packet radio system, detailing both its hardware and software components specifically designed for amateur radio use. The resource offers insights into the technical specifications and operational aspects of the BayCom modem, which has been a staple for many German packet radio enthusiasts. It covers the integration of these components within a typical amateur radio station setup, enabling reliable digital communication. Further, the site provides a broader context by including general information about the German packet radio network. This encompasses network topology, operational protocols, and historical developments relevant to packet radio in the region. Users can find details on how to connect to and utilize the existing infrastructure, fostering participation in the local digital amateur radio community.

The mark 2 Crossfield Antenna was described in Sprat 76 by Alec, GD3HQR

A University of Florida Student Organization. The W4DFU amateur radio station was established in 1934 and represents the Gator Nation internationally on a daily basis.

Local amateur radio clubs often serve as vital hubs for hams to connect, share knowledge, and participate in group activities. The Orleans County Amateur Radio Club (OCARC), operating under the callsign WA2DQL, provides a focal point for amateur radio operators in Albion, New York, and the surrounding Orleans County area. These organizations frequently host events, offer technical assistance, and foster camaraderie among members, supporting various aspects of the hobby from contesting to emergency communications. OCARC's activities include discussions on proposed Technician class privileges for **80, 40, and 15 meters**, indicating an interest in regulatory changes affecting entry-level licensees. The club also promotes the use of online tools like _Radio Mobile Online_ for antenna pattern analysis and _VOACAP Online_ for propagation predictions, aiding members in optimizing their station performance. Furthermore, OCARC highlights participation in _Parks On The Air_ (POTA) events, such as the Erie Canal Bicentennial Celebration in 2025, encouraging outdoor operations and public engagement with amateur radio.

a Podcast for amateur radio enthusiasts... by jeff davis, ke9v

Established around 1968, the Wichita Amateur Radio Society (W.A.R.S.) N5WF provides a central hub for amateur radio operators in the Wichita Falls, Texas area. The society actively supports local ham radio interests, fostering community engagement and technical development among its members. W.A.R.S. is known for its commitment to public service communications and promoting the amateur radio hobby through various activities and educational initiatives. The society's activities often include field operations, technical presentations, and participation in emergency communications drills, which align with its mission to support the amateur radio community. Members frequently engage in _DXing_ and _contesting_, sharing their experiences and knowledge to help others improve their operating skills. The club also maintains local repeaters, providing essential infrastructure for regional communications.

The Pikes Peak FM Association is a nonprofit, amateur radio VHF/UHF group which operates and maintains VHF and UHF communications facilities serving the Colorado Springs and Pikes Peak region.

A very useful video that explains how to program the TYT MD-2017 radio. From software download, firmware, codeplug and how to manually configure settings and how to program memories

iOS EchoLink client, this free app will allow licenced ham radio operators to use iPhone, iPad or iPod devices to connect to the echoLink system and connect to repeaters or other echolink users.

Indexes over 100 digitized amateur radio callbooks, primarily from the early to mid-20th century, providing a historical record of callsign assignments and licensee data. The collection facilitates research into past amateur radio operations, tracing callsign lineage, and identifying operators from specific eras. Each entry typically includes the callsign, licensee name, and geographic location as published in the original printed volumes. Users can browse the collection by publication date or utilize the search function to locate specific callsigns or names within the archived documents. The resource serves as a valuable repository for historical amateur radio data, supporting genealogical and operational research. Access to these scanned documents is provided directly through the Internet Archive platform, ensuring long-term preservation and availability of these historical amateur radio records.

Radio for Peace International (RFPI) is a Global Community Radio Station located in Costa Rica, Central America that broadcasts progressive news on shortwave radio and the internet on topics of Peace, Human Rights and the Environment. RFPI gives a voice to the voiceless by promoting democratic communication.

Open source project offers a solution to remote control of your Amateur radio station. Base for connecting other components and their remote control. The main advantage is low cost and adaptability

A video about secret listeners ham radio voluntary interceptors during ww2 an extract from The Secret Wireless War DVD

A Bluetooth Headset Interface with built-in PTT for Amateur Radio by Bertrand Zauhar, VE2ZAZ

Welcome to the home page for the Lake Area Amateur Radio Klub (K5LRK) located in southern Denton county, Texas

W9dc north america amateur radio checkpoint for iota islands on the air and wlh world lighthouse award applications and award instructions

CAARA, an ARRL affiliated club, operates the 2 meter W1GLO repeater on 145.130 MHz

Provide an educational and recreational organization whose purpose is to support the Home Port Alliance in providing technical expertise, skills and volunteer manning.

Zveza Radioamaterjev Slovenije

Ikeda Shimin (Citizen) Amateur radio Club is the club which consists of Ikeda(JAPAN) citizens.``Sorry...japanese language only.

The A QRP Club is a small group of Amateur Radio enthusiasts who enjoy building, operating and (mostly) talking about Low Power radio communications, equipment and systems.

Wikipedia page about amateur radio spectrum assigned to the amateur radio service

VHF – Based on realtime APRS reports. This map shows real-time radio propagation from stations operated near 144 MHz. It uses data gathered by Automatic Packet Reporting System-Internet Service (APRS-IS) from packet stations in the amateur radio service. The map shows activity from the past hour. Paths are smoothed to create a color-coded footprint indicating the distance VHF signals are likely to be traveling.

Wrexham is in North Wale's and our club is open to all radio fans

ARRL Affiliated Club Phoenix, Arizona

Local radio club for Harlow in Essex, England

The Megacycles combine the hobbies of amateur radio and bicycling. This group is not a club as there are no officers, dues or by-laws.

Operating as a local amateur radio club, the Wireless Association of South Hills (WASH) provides a community hub for hams in the Pittsburgh, PA area, identified by the N3SH callsign. The club engages in a range of activities including the Annual Field Day, the PA QSO Party, and a 2 Meter Contest, fostering participation in various aspects of the hobby. WASH also supports local ARES/RACES efforts, highlighting the critical role of amateur radio in emergency communications during disasters, and facilitates ARRL/VEC exam sessions for new licensees. Beyond contests and emergency preparedness, WASH hosts club picnics and an annual hamfest, promoting social interaction among members. The club maintains VHF/UHF repeaters, which are essential for local communication and extending range for members. Regular activities include a Monday evening WASH NET at 8:00 PM, providing a consistent on-air gathering point. The club's focus on both recreational and public service aspects of amateur radio, from making new friends to providing vital disaster communications, underscores its comprehensive approach to the hobby.

Japan Amateur Radio League