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Young Stars Radio Club, is a group consisting the short wave radio listeners' and DXers - having the hobby of radio listening and QSL collection, sharing the experiences and views about international radio broadcasting

Calnet a multi repeater amateur radio system serving most of California and parts of Nevada. The Calnet system consists of numerous fulltime linked 440 MHz repeaters connecting San Diego to San Francisco and Lake Tahoe.

Windows Programming Software by RT Systems for Amateur Radios and Receivers

The HamCall.net database offers a detailed listing of amateur radio callsign divisions, organized by prefix, which is crucial for DXers and contesters to quickly identify the geographical origin of a station. Each entry includes a specific callsign prefix, the total count of callsigns registered under that prefix, and the associated DXCC country or entity, such as "AL9Z 43203 USA" or "3AOH9MM 237 MONACO." This structured data allows operators to rapidly ascertain the DXCC entity for a given callsign, aiding in QSL verification and award tracking. This information is particularly useful for confirming rare DX entities during contests or for logging contacts for awards like DXCC. For example, an operator hearing a "3Y0C" callsign can immediately identify it as Bouvet Island, a highly sought-after entity. The inclusion of callsign counts provides a sense of the activity level within each prefix, which can be helpful for anticipating pile-ups or assessing the likelihood of making a contact. The data presented reflects a snapshot of the HamCall database, offering practical insights into global amateur radio demographics.

Industrial Communication Engineers (ICE) was a manufacturer specializing in **RF components** and solutions for amateur radio and commercial applications. Their product line included a range of RF parts, various types of filters, and RF switching products designed to enhance station performance and mitigate interference. These components were critical for hams engaged in contesting, DXing, or general operating, providing means to improve signal integrity and manage complex antenna systems. The company's offerings addressed common operational challenges such as RFI and TVI, with products like **low pass filters** and antenna filters. While the specific technical specifications of their product range are no longer available, such components typically provided significant attenuation of unwanted harmonics and out-of-band emissions, crucial for maintaining a clean signal and preventing interference with other electronic devices. The current status indicates the domain is for sale, suggesting the manufacturing operations have ceased.

The NCDXF/IARU International Beacon Project operates a worldwide network of 18 high-frequency radio beacons, continuously transmitting on 14.100, 18.110, 21.150, 24.930, and 28.200 MHz. These beacons, initially launched in 1979 with a single station and expanded to the current 18-beacon system in 1995, provide reliable signals for both amateur and commercial users to assess current **ionospheric propagation** conditions. The system's design, construction, and operation are managed by volunteers, covering hardware and shipping costs. The resource details the evolution of the beacon network, including the transition from Kenwood TS-50s transmitters to Icom IC-7200 radios with a new controller design implemented in 2015. It explains how listening for these 100-watt signals, transmitted to vertical antennas, allows operators to determine band openings and optimal propagation paths globally. The content also references three QST articles providing historical context and technical specifics of the beacon project. Practical information includes methods for identifying transmitting beacons via a schedule or specialized software like FAROS and Skimmer, which integrates with the **Reverse Beacon Network** for automated monitoring.

W5PC is an ARRL Special Services Club, ARES/RACES/SKYWARN in Weatherford, Parker County, TX

Birmingham (Alabama) Amateur Radio Club, since 1926

Specializing in antique, vintage and tube radio repair, all makes. Transistor radio repair- from the 50's to the present. Free estimates.

Single Coax Feed to Multi-Band Copper Cactus Antenna.

Maker of QRP Kits, QRP CW receiver and transmitters, audio CW Filters, antenna tuners, dummy loads, and morse code practice oscillator

German CW radio club

A 27-28 Mhz quad loop antenna by Bernard Mourot F6BCU in french

Schematic of Yaesu FT-857 main board original jumpers based on different radio type

Ham Radio and DX topics by AC6V

Radio Club ON4GDV, home page of Gang De Verviers, located in Belgium

VSP Manager is a software program that creates serial port pairs which allows software programs to talk to each other using Cat commands. This virtual com port emulator is offered FREE to Ham Radio Operators.

Hjemmesiden til Follogruppen av Norsk Radio Relc Liga

Antique Radios of all kinds plus an operating ham station

Information and tutorials about all aspects of radio and electronics including propagation, ham radio, electronics, radio history, etc

Description, frequencies and sound samples of most popular amateur radio digital modes by DG8FBV

WI ham club partecipate in Field Day, sponsers an annual Swapfest held in August, and provides various repeaters.

The object of Danish DX Group is to attract DX-interested radioamateurs in a closer co-operation

Details Allied Wire and Cable's extensive product catalog, focusing on its role as both a distributor and manufacturer of specialized wiring solutions. The resource highlights the availability of electronic and electrical wire, various cable types, tubing, and pre-assembled cable solutions. It also specifies their capability in **custom cable design**, addressing unique requirements for specific applications. The site presents information on flexible cable options and a broad spectrum of wire and cable specifications, catering to diverse industrial and technical needs. It outlines the company's capacity to provide tailored solutions beyond standard off-the-shelf products, emphasizing their engineering and manufacturing expertise. Key offerings include **coaxial cable**, connectors, and general wiring components, positioning the company as a comprehensive source for connectivity infrastructure. The content implicitly supports applications ranging from industrial automation to specialized radio frequency installations.

The South Brevard Amateur Radio Club is based in the Melbourne, Florida area and provides volunteer communications services to the public and provides a common organization for amateur radio operators in the south Brevard County area to operate under.

Details the Northern Amateur Relay Council of California (NARCC) as the regional coordinating body for amateur radio repeaters operating on the 10-meter band and above. It outlines NARCC's function in managing frequency allocations to minimize interference and ensure efficient spectrum use across Northern California. The resource specifies that NARCC operates in cooperation with the FCC and ARRL, indicating its recognized authority within the amateur radio community. The organization's role centers on repeater coordination, a critical aspect of VHF/UHF operations where multiple stations share limited frequency segments. It highlights the support received from local amateur radio operators, underscoring a community-driven approach to spectrum management. The site serves as a primary reference for hams seeking to establish or operate repeaters within the designated service area. NARCC's activities directly impact the operational landscape for _VHF_ and _UHF_ enthusiasts, providing essential guidelines and coordinated frequencies. This ensures orderly communication and prevents conflicts, particularly in densely populated areas of Northern California.

CB Radio guide by International Radio Dx Group. Only available for members of this group.

The widest range of stocked components for the electronics, electrical and mechanical engineer.

American Radio Relay League

Homebrew a 2 meter square dipole antenna

Official ADIF Site. ADIF is an open standard for exchange of data between ham radio software packages available from different vendors.

Article about types of materials that make the best earth grounding systems

In this youtube video G8GKC M0KKW and 2E0IAJ from Icom UK give a global overview of the ICOM IC-7300 HF 50 70MHz Software Defined Radio transceiver

The _National Contest Journal_ (NCJ) serves as a dedicated resource for amateur radio contesters, providing in-depth articles, operational strategies, and technical insights. Published bimonthly by the ARRL, it covers a wide array of contesting topics, including antenna systems, station optimization, operating techniques, and rule interpretations for major events like the NA Sprint and various QSO Parties. The journal aims to enhance the competitive edge of participants across all skill levels, from casual operators to serious multi-operator teams, by sharing experiences and data from high-scoring stations. NCJ content frequently includes detailed analyses of contest results, offering breakdowns of scores, participant statistics, and comparisons of operating strategies. Readers can find practical advice on improving their contest performance, such as optimizing logging software usage or maximizing **run rates**. The journal also features columns on specific contest modes like RTTY and provides updates on rule changes and upcoming events, helping contesters prepare for future competitions and achieve better results, often leading to **top 10** finishes in their respective categories.

WB4WOR Propagation Beacon on 6 and 10 meters Jointly Owned and Operated by the Broadcast Packet and Repeater Group and Piedmont Amateur Radio GroupRandleman, NC USA

Italian page about a home made a 1 to 40 balun with pictures and measurements on HF bands.

For amateur radio operators engaged in **radio direction finding** (RDF) and **transmitter hunting** (T-hunting) activities, this resource provides a catalog of printed circuit boards (PCBs) for constructing various DF and foxhunt-related projects. The offerings include PCBs for 80-meter fox transmitters and receivers, UHF fox transmitters with audio recording capabilities, and several designs for general-purpose radio direction finders. Specific projects like the "Simple 80M ATX-80 Transmitter" and the "N0GSG DSP Radio Direction Finder" are listed, along with attenuator boxes and specialized components for Doppler DF systems. The catalog details PCBs for projects published in prominent amateur radio magazines such as *73's*, *CQ*, *QST*, and *PE*, indicating their origin and design pedigree. For instance, the "Montreal Fox Controller" is sourced from the *Homing-In* column by Joe Moell, K0OV. The resource also lists components for advanced Doppler DF systems, including main boards, LED display boards, and antenna switch boards, with options for programmed PIC microcontrollers. Pricing for each PCB is provided, allowing hams to acquire the necessary components for their DIY RDF endeavors.

This publications page lists articles on surface mount devices, amateur radio, soldering, shunts, and measuring large direct currents.

TurboLog is a station management and logging program designed for amateur radio operators, providing robust database and logging functionalities. It features fully integrated support for controlling typical radio station equipment, including transceivers, packet radio TNCs, Morse and voice keyers, and digital mode terminals. The software also incorporates antenna switching capabilities and acoustic alerting, streamlining station operations for DXing and contesting. The program's utility extends to award tracking for entities like DXCC and IOTA, alongside comprehensive callbook and ham database integration. It supports log import and export, QSL label generation, and includes TNC drivers for packet radio. The trial version allows users to evaluate its extensive features before commitment, making it a versatile tool for managing complex amateur radio station configurations and operational data.

Dimensions for the inverted V antenna from 160 to 2 meters by N6JSX

Unlocking the full multiband potential of the 225 Ohm elementary radiator in a folded monopole, dipole-like or turnstile layout, by Francesco Errante

RTTY.COM has been established to focus on the many aspects of Amateur Radio Teletype (RTTY) and to present to the dedicated RTTYer, and to the curious, a location wherein one can find information relating to RTTY and BAUDOT communications.

Amateur Radio Projects & Kits for homebrewers, includes DDS,sound card interface,programmers, hamcom, frequency counter, RF Power Meter, modems and more.

Clandestine radios, cluster beacons and dx stations recordedd by AA5TB

For those who are interested in telegraphy, for those who would like to learn it, for those who love it, and for those who want to improve their skills in it

SMIRK club news, DX information, content details, and forum for 6 meter operation enthusiasts.

A nice loop antenna project for 28 MHz with schematic diagram, construction details and a complete video instruction

Cobalt Pet is a weblog focusing on shortwave radio. It features shortwave reception reports, product reviews, photos, listening tips, and links. International broadcasters and amateur / ham radio operators are monitored and discussed.

Radioberry Radio hat for raspberry pi. HF (0-30 MHz) The latest development of PA3GSB is a radio card plugged into a raspberry pi (2 or 3) , a so called rpi-hat, forming an amateur radio.

OZ2OE Technical Home Page - Building a circular polarized yagi