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A summary of common calling frequency for each digital mode on that band.

When assembling a robust shack, the quality of interconnects often determines overall system integrity and signal fidelity. Neutrik, with over 50 years in the connectivity sector, specializes in professional-grade connectors that withstand rigorous use in entertainment and industrial applications. Their product range includes XLR, speakON, powerCON, and opticalCON series, which are frequently adapted by hams for critical station infrastructure, particularly in contesting or DXpedition environments where reliability is paramount. Amateur radio operators often repurpose these durable connectors for antenna switching matrices, audio interfaces for digital modes, or power distribution systems. The robust locking mechanisms and high-quality contact materials found in Neutrik products ensure stable connections, minimizing intermittent faults that can plague field operations or even fixed station setups. This attention to mechanical and electrical integrity aligns well with the demands of high-power RF environments and sensitive receive chains. While primarily serving the pro-audio and video markets, the engineering principles behind Neutrik's designs translate directly to the needs of radio amateurs seeking superior performance and longevity from their cabling and connection points. Their commitment to innovation, as highlighted by their 50-year journey, suggests a continuous evolution of products that could benefit future amateur radio applications.

A Quick start guide to NPR New Packet Radio on 70 cm band by the NPR author Guillaume F4HDK. This presentation introducte basic concepts of this niew digital protocol, and guide the user to the first modem configuration both of client and master modems. Includes a final recap of commands.

Next Generation Beacon hardware platform encompasses both analog and digital modes, i.e. CW FSK and MGM in a mixed mode configuration. The advantage of the mixed mode is that humans can decode the CW FSK by ear and the MGM can be decoded by computers way below what is audible. Therefore the MGM can be used for pre-human-conditions or early warning monitoring.

Operating where independent media is suppressed, _Radio Free Europe/Radio Liberty_ (RFE/RL) delivers news and information in 27 languages to audiences in 23 countries. This resource primarily functions as a news portal, focusing on geopolitical events, regional conflicts, and human rights issues, particularly in areas like Ukraine, Russia, Iran, Afghanistan, and Central Asia. It features articles, videos, podcasts, and photo galleries, covering topics such as international relations, energy politics, and the impact of conflict on civilian populations, often highlighting the perspectives of local journalists and freelancers in challenging environments. The content frequently addresses the operational context of shortwave broadcasting, though the site itself is a digital news platform. For example, it details the implications of long-distance strikes and regional military capabilities, which are relevant to understanding the strategic importance of various communication methods. The resource also provides insights into the challenges faced by populations in areas with limited access to uncensored information, underscoring the role of independent news organizations in providing alternative narratives.

Operating a QRP station in frigid conditions presents unique challenges, particularly concerning power management and equipment reliability. This resource outlines a specific winter portable configuration, focusing on maintaining operational capability when temperatures drop significantly. It details the use of a _Yaesu FT-817ND_ for digital QRP modes, paired with a _Raspberry Pi_ for digital signal processing and logging, demonstrating a practical approach to cold-weather field communications. The article provides insights into selecting appropriate power sources, such as LiFePO4 batteries, and managing their performance in sub-zero environments. It also covers shelter considerations, including tent selection and heating strategies, crucial for operator comfort and equipment protection during extended activations. The author, _OH8STN_, shares firsthand experience from Arctic Circle operations, emphasizing robust gear choices. Further content includes a video walkthrough, illustrating the physical setup of the station, antenna deployment, and the overall operational workflow in a winterized environment. This visual aid complements the written text, offering a comprehensive view of the entire portable station, from the transceiver to the power system and the protective shelter.

German association dedicated to digital radio communications

Presents a personal blog, "QSL, maraca!", maintained by Luiz Belem, PY1UR, detailing his amateur radio endeavors. The content includes posts on station setup, operating experiences, and general ham radio topics, reflecting the perspective of an active DXer and contester. The blog serves as a digital logbook and platform for sharing insights with the amateur radio community. Documents PY1UR's participation in various on-air activities, showcasing his QSL card collection and providing narratives behind specific contacts. It offers practical insights into antenna configurations and radio equipment used, demonstrating effective strategies for achieving **DX contacts** and improving station performance. The blog's entries provide a historical record of PY1UR's _amateur radio journey_.

Silvercomet ARS is located in Paulding County Georgia. We are a ARRL Special Service Club. We hold Training Classes, do many Special Events Stations. We are also very involved in Digital Modes.

This resource is an online tutorial focused on setting up the Raspberry Pi for amateur radio applications. It covers the installation and configuration of various software packages tailored for digital communications and protocols, including _Packet Radio_ with Hamlib and Direwolf, as well as data modes like FLDigi and WSJT-X. The guide also details the integration of hardware components such as GPS clocks for time synchronization and real-time clocks for enhanced functionality. Users will find instructions for installing software like GPredict for satellite tracking and GQRX for software-defined radio (SDR) applications. The tutorial emphasizes practical steps, including the use of command-line inputs in the Raspberry Pi OS terminal, and provides troubleshooting tips for common issues such as faulty SD cards or insufficient power supplies. Operators are encouraged to explore various applications, including APRS iGates and WSPR beacons, to enhance their ham radio experience. The material is designed for licensed amateur radio operators with basic knowledge of electronics and computing.

A group for sharing, learning or presenting practical ideas and field experience for Ultra portable ham radio digital comm

An in-depth comparison here between the various digital technologies

This site is basically for the begeners (SWL) of india. This site is supporting to digital communication for hams also.

Locura Digital is a Radio-Communication Professional company, dealer for wide range of amateur radio products, based in Barcelona Spain

A mailing list in spanish to exchange shortwave dx i nformations

A club dedicated to Hellschreiber, or Hell, a unique, HF digital mode for sending and receiving text using facsimile technology

Digital modes and information Gran Canaria

Operating as a hub for its members, the Club Radioamateur Sorel-Tracy VE2CBS Inc. website provides essential information regarding club activities, membership management, and technical resources. It features articles on topics such as **D-STAR** digital voice mode training, offering a multi-capsule course for members to understand, configure, and effectively use D-STAR with ICOM equipment, including callsign routing and reflector connections. The site also details access to member cards, renewal processes, and upcoming events like the annual HAMFEST, which serves as a significant gathering for local radio amateurs. Beyond club-specific news, the site curates information on useful amateur radio tools and technologies, exemplified by articles on **HamClock** for propagation and satellite tracking, and a quick guide to Meshtastic for LoRa-based mesh networking. These resources aim to support members in exploring modern digital modes and enhancing their station operations, reflecting the club's commitment to fostering technical knowledge and community engagement within the Sorel-Tracy amateur radio scene.

Relays, controllers, power meters, fault recorders, power sensing products

The W0IS resource outlines methods for finding historical US amateur radio call signs, particularly for genealogical research. It highlights the comprehensive collection of digitized call books from 1906-1996 available at leehite.org, stored as searchable PDF files. These resources significantly simplify what was previously a laborious manual search through physical call books, which were typically indexed by call sign rather than name. The guide details specific search techniques for various eras. For early radio days (1913-1923), government call books are readily available and searchable online via Google Books and hathitrust.org. For the period between the 1930s and 1980s, when private publishers like "Radio Amateur Call Book Magazine" dominated, the resource points to archive.org for scanned editions (1938, 1940, 1948, 1972) that support full-text OCR searches, despite potential scanning errors requiring flexible search terms. It also provides strategies for navigating Google Books' "snippet view" for the 1952 call book, including searching by name or address and interpreting often illegible snippets. The resource suggests cross-referencing findings with hamcall.net for call sign verification from 1921, 1954, 1960, 1969, and 1983 onwards. Additionally, it lists physical call book collections at institutions like the Pavek Museum of Broadcasting and individuals like W3HF, offering avenues for deeper research when digital methods fall short.

The next generation beacon platform for the OZ7IGY beacons should encompass both the analog and digital mode, i.e. FSK and MGM in a mixed mode configuration

In this article WB8NUT review the most popular amateur radio related digital mode software for windows and MacOSX

Article on how to use logic analyzers for testing complex logic-digital circuits

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.

Sixty-meter repeaters typically use a 1 MHz frequency separation between input and output, while 2-meter repeaters commonly employ a **600 kHz** split and 70-centimeter repeaters use a **5 MHz** offset. This article details the fundamental technical principles of amateur voice repeaters, explaining how they extend VHF/UHF communication range by receiving on one frequency and simultaneously retransmitting on another. It covers essential components such as receivers, transmitters, filters, and antennas, often situated on elevated locations for optimal coverage. The resource delves into the critical challenge of _desensing_—where the repeater's strong transmit signal overpowers its own receiver—and the engineering solutions employed, including antenna separation and the use of high-Q cavity filters. It also explores various control and timing systems, from basic squelch activation to more sophisticated microcontroller-based boards that manage functions like voice identification, time-out timers, and fault protection. Different access methods are discussed, including open access, toneburst, CTCSS subtone, and DTMF, each offering distinct advantages for managing repeater usage and mitigating interference. Furthermore, the article examines repeater linking, both conventional RF methods and modern internet-based solutions, highlighting how linking expands coverage and promotes activity across multiple repeaters or bands. It introduces less common repeater types such as 'parrot' repeaters, which use a single frequency and digital voice recording, and linear translators, capable of relaying multiple signals and modes simultaneously across different bands, often found in amateur satellites.

Offer a Direct Digital VFO Kits (variable-frequency oscillator) using the Analog Devices AD9951 by WA1FFL

My LoTW is a free viewer app for Logbook of the World by ARRL. Features include, View all the QSOs you have submitted to LoTW, Add multiple callsigns under your LoTW account, View all your QSLs, Share digital QSL image which is created by the app for QSLs. Either save it on your device or share it on facebook, View statistics for your worked stations/DXCC/bands etc

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.

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.

With the new name TRANSRADIO, the former TELEFUNKEN SenderSysteme AG enters into the new digital age of Broadcasting – DRM.

This page contains Contributions to a Discussion on the Moon-Net about the Application of Digital Signal Processing (DSP) Methods in Moonbounce.

PropNET is an ad-hoc 2-way (and potentially, "more-way") RF-based digital communication network whose activity is reported on the Internet. As participating stations periodically ID and exchange data, they report their activity to an Internet data-collection hub for presentation through this web site.

Introduction to packet radio and answers to common questions about this digital mode and about services you can use by VKFAQ

Build a digital AC voltmeter to measure the output range from 0 to 150VAC with reasonable accuracy

Operating Free DV, the open source digital voice codec for HF, allows any SSB radio to be used for low bit rate digital voice.

Operating a modern amateur radio station, particularly for advanced digital modes or microwave experiments, often requires precise test and measurement equipment. This resource from NI (National Instruments), now part of Emerson, showcases a wide array of hardware and software solutions designed for demanding test objectives. Their portfolio includes modular instruments and configurable software interfaces, such as _LabVIEW_ and _TestStand_, which integrate AI assistance via _NI Nigel™ AI_ for code completion and sequence building. For those involved in RF and microwave work, the offerings extend to vector signal transceivers, RF signal generators, software-defined radios, and spectrum analyzers. These tools are crucial for characterizing antenna performance, optimizing transceiver circuits, or developing custom radio systems. The company emphasizes its 50 years of innovation, with 40 years dedicated to _LabVIEW_, highlighting a long-standing commitment to engineering solutions. The site also details products for data acquisition, electronic test, and wireless design, covering components like CompactDAQ modules for precise sensor measurements and various communication bus interfaces. Their events and perspectives sections offer insights into topics such as 5G technology and strategies for breaking out of testing silos, providing a broader context for their measurement solutions.

The Cambridge University Wireless Society (CUWS) serves as the amateur radio society for students and staff at Cambridge and Anglia Ruskin Universities, fostering interest and activity in two-way radio communication. It provides a platform for members to engage with various aspects of amateur radio, including operating, technical experimentation, and community building within the university environment. The society's activities typically encompass station operation, antenna construction, and participation in contests and DXing. As a university-affiliated club, CUWS offers practical experience in radio theory and application, often utilizing the club callsign _G6UW_. Members learn about different modes of operation, such as CW, SSB, and digital modes, and gain hands-on experience with transceivers and associated equipment. The society's focus includes preparing members for amateur radio licensing exams and promoting ethical operating practices. Participation in CUWS provides a foundation for future involvement in the broader amateur radio community.

This resource presents a placeholder page for the _Tobacco Valley Amateur Radio Club_ (TVARC), signaling the future establishment of an online presence for this amateur radio organization. The page currently displays a "Coming Soon" message, indicating that the club's official website is in development. It serves as a preliminary marker for the club's digital footprint, suggesting an upcoming platform for members and prospective hams. The current state of the page offers no technical details, operational information, or specific club activities. It functions solely as a temporary landing page, prompting site owners to log in for launch and visitors to check back later. The resource does not provide any data on club repeaters, meeting schedules, or special events, nor does it detail any past achievements like **DX contacts** or **contest scores**.

OpenHamClock is a modern, open-source dashboard for amateur radio operators, designed as a web-based successor to the original HamClock. Deployable locally on a Raspberry Pi or via the cloud, it centralizes essential DX operations into a single, intuitive interface. At its core is an interactive world map that visualizes real-time DX spots, signal paths, satellite tracking, and POTA activators. The software seamlessly integrates critical tools like WSJT-X, DX Cluster, and PSKReporter for monitoring digital traffic. Additionally, it provides vital environmental data, including real-time space weather indices, solar activity, and personalized HF propagation predictions. With customizable themes and a modular architecture, OpenHamClock offers modern operators comprehensive, at-a-glance situational awareness of global radio conditions

The PI6ATV repeater, operating on 10.475 MHz, serves the amateur television community by providing both analog and digital DVB-S2 services. Recent updates include user-adjustable Symbol Rate settings via Webcontrol, allowing operators to optimize their digital ATV transmissions for various conditions. This functionality, implemented on December 13, 2022, enables dynamic configuration of the digital stream. Significant technical milestones include the return of the analog ATV transmitter on 10.475 MHz, featuring a newly constructed liquid-cooled final amplifier by Edwin PD2EBH. This restoration on September 6, 2020, followed an 18-month hiatus, ensuring continued support for traditional analog ATV enthusiasts. The repeater's transition to DVB-S2 modulation, initiated on December 20, 2018, addressed capacity limitations of the previous DVB-S setup. This change from 20 MS/s with FEC 3/4 to DVB-S2 allowed for more efficient data handling, accommodating multiple channels within the available bandwidth and enhancing the overall digital ATV experience.

Icom 706MkIIG Filters, Make a narrow CW filter work in SSB for the digital modes

A very compact and multifunctional digital amateur radio station for the radio operation at home, on the way or in the emergency radio implemented with a Raspberry Pi 4, an Elecraft KX2, a Kenwood TH-D74 and a USB GPS.

The Tektronix digital multimeter is a feature-rich tool with the accuracy and precision you need for your most demanding measurements.

The High Point Amateur Radio Club (HPARC), operating under the callsign W4UA, provides a central hub for amateur radio enthusiasts in High Point, North Carolina, and surrounding communities. The club's website outlines its long-standing traditions and civic service, which date back to the 1930s, highlighting its sustained leadership and strong membership support over decades. It serves as a resource for individuals interested in obtaining or upgrading an FCC amateur radio license, offering assistance through direct contact with club officers. The site also features a newsletter archive for meeting notices and information on club activities, including Field Day. HPARC's diverse membership shares a common interest in the amateur radio hobby, encompassing various aspects such as VHF, UHF, HF, and digital modes like D-STAR. The club's commitment to public service is evident through its involvement in ARES and Skywarn, alongside educational initiatives for new hams and those pursuing license upgrades. The site also lists repeaters and provides information on emergency communications, technical projects, and participation in events like DXCC and contests, reflecting the broad interests of its members.

This resource, despite its title, does not provide information relevant to amateur radio operations or the W1BD Central Vermont Amateur Radio Club. Instead, the content focuses on commercial topics such as vinyl lettering, business signage, and brand recognition strategies. It details the application of _transfer tape_ for graphics, the importance of pre-masking in vinyl cutting, and the use of squeegees for smooth decal application. The site also discusses various types of business signs, including monument signs and awning signs, highlighting their role in attracting customers and establishing brand presence. Further sections delve into home maintenance tasks like gutter cleaning, offering advice on using power washers and the importance of safety measures when working on ladders. The content also explores strategies for building brand recognition and customer loyalty, emphasizing consistent marketing efforts and excellent customer service. It touches upon the use of custom-printed bags and digital displays, such as LED signs, for enhanced visibility and engagement. The site's articles include practical tips for kitchen renovations, such as upgrading cabinet hardware, adding pendant lighting, and repainting cabinets to achieve a fresh look without significant expense. The content is entirely unrelated to amateur radio activities, club information, or technical aspects of radio communication.

The Boone Area Radio Klub (BARK) serves Boone County, Iowa, as its local amateur radio club, actively welcoming visitors to its meetings and weekly ARES nets. The club maintains a 2-meter repeater on 146.850/250 MHz with a 114.8 Hz tone and a 440 MHz repeater on 443.9+ MHz, both situated at the Boone County Hospital, with a simplex fallback on 146.550 MHz for the 2-meter net. Additionally, BARK supports the Iowa 160-meter ARES net at 1.972.5 MHz, which operates at 9:30 PM on Sundays, featuring a rotating schedule of net controls including KNØR, KBØMPL, NØISU, KEØQEU, and KBØLPI. BARK conducts bimonthly license testing sessions on the second Saturday of even-numbered months, with specific dates like October 19, 2024, at the Hamboree, requiring a $15 fee and prior FCC Registration Number (FRN) acquisition. The club's activities are well-documented through numerous photo galleries from past Field Days (1998, 1999, 2008, 2010, 2013, 2017, 2018, 2019), JOTA events (2013), and special event stations (2010 B&SVRR&M). Members like KBØMPL (Margot Conard) have contributed educational PowerPoint presentations on topics such as "Fun with Handie Talkies," "HF Propagation," and "Digital Mode - FLDIGI - OLIVIA 8/500 - JT65 HF - BAND PLANS." The club's officers, as of May 2018, include WØFS (Clay Conard) as President, NØISU (Mitch Carroll) as Vice-President, and KBØLPI (Eric Sloan) as Treasurer/Secretary, guiding the club's operations and community engagement.

Amateur radio, commercial, two way handheld and mobile transceiver manufacturer produce VHF UHF analogn and digital DMR two-way radio

Since 2011, crkits offer radio kits that you cannot find on eBay or AliExpress. Includes HT-1A 20/40m Dual Band CW Transceiver Kit, D4D DSB Transceiver Kit for Digital Mode, R3500D ARDF Receiver, CW Transceiver Kit

Amateur radio operators often document their station activities, equipment, and on-air experiences through personal blogs. These platforms serve as a digital logbook, sharing insights into antenna setups, radio modifications, and DX contacts. Such blogs frequently feature photographs of the shack, descriptions of operating conditions, and reflections on various aspects of the hobby, including contesting or portable operations. The PBG Station Brunei blog provides a glimpse into the amateur radio scene from Southeast Asia. It covers general station updates, local repeater information, and personal reflections on radio operations. The content offers a localized perspective on ham radio activities within Brunei, including details about specific frequencies and equipment used for local communication.