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This wiki is intended to help identify radio signals through example sounds and waterfall images. Most signals are received and recorded using a software defined radio

Women Radio Operators of New England was established in 1955. WRONE is an amateur radio club for female radio operators living in the six New England states

xperience 3 YLs having a 2 Meter QSO

Article on RTL SDR dongles to receive UHF VHF ham radio bands

The 9W2VVH blog documents the amateur radio journey of Hussairy, focusing on his station setup and operational experiences from Malaysia. Content includes details about his _Yaesu FT-857D_ transceiver, which serves as the primary rig for HF, VHF, and UHF operations, often paired with a _G5RV_ antenna for HF bands. The site also features discussions on various aspects of ham radio, such as antenna experimentation and QSL card exchanges, reflecting a hands-on approach to the hobby. Operational updates frequently cover DX contacts and local ragchews, providing insights into propagation conditions and operating techniques from Southeast Asia. The blog serves as a personal log and sharing platform, showcasing the practical application of amateur radio equipment and fostering connections within the global ham community.

iSpectrum is a free spectrum analyzer for MacOS that allows you to display live audio in a standard frequency plot, waterfall display or in a stereo oscilloscope view. Used by ham radio operators, audiofiles, musicians, and Sound Technicians.

Amateur Radio 40m 20m 15m Half Wave Fan dipole antenna project with part list, pictures and drawing. Includes the option to expand the antenna to cover the 80 meters band

HobbyPCB.com provides quality products and boards for amateur radio including the popular HARDROCK 50 amplifier

Radio Filters manufactures low price fm notch filters.

Ham Radio Vertical HF multiband antennas manufacturers based in Spain

SCRRBA is a volunteer organization providing coordination of a number of heavily utilized amateur radio frequency bands in Southern California.

Russian Tubes, Capacitors , Resistors , Ferrites Sockets and other components

The RVARC is a Fredericksburg, VA area 56 year affiliated club with the American Radio Relay League, ARRL.

Korean Amateur Radio League

Operating RTTY digital mode, this resource provides access to various versions of the _2Tone_ software engine, specifically designed for decoding and encoding RTTY signals. It details the evolution of the software, highlighting a significant technical requirement change where versions 24.09b through 26.01a necessitate a PC CPU with the AVX instruction set, a crucial detail for operators considering system compatibility. The page lists numerous historical and current releases, enabling users to select a version compatible with their hardware and operating environment. The utility of 2Tone lies in its ability to interface with established amateur radio programs such as _N1MM Logger+_, WriteLog, and QARtest, enhancing their RTTY capabilities. While specific performance metrics like decoding accuracy or WPM limits are not quantified on this page, the availability of multiple versions, including those without AVX requirements, suggests a commitment to broad user accessibility. The software's integration with major contest logging applications indicates its primary application in competitive RTTY operations, where reliable decoding is paramount for achieving high scores.

Amateur radio antennas manufacturer, produce multiband and monoband high performance yagi antennas and vertical antennas based in Poland

Software Defined Radio parts, RTL-SDR DVB-T USB Stick, cables, antennas, upconverters, leds delaer

A Virtual Museum of Vintage Radios from the Golden Era

Dedicated to the advancement and promotion of amateur radio, Rome, Ga.

Liga Colombiana de Radioaficionados

The Mobile-Portable Reflector serves as a dedicated discussion platform for amateur radio operators interested in mobile and portable operations. It facilitates the exchange of information and answers questions specifically related to operating amateur radio from vehicles, temporary field locations, or while walking. The platform is not intended for general amateur radio discussions; its scope is strictly limited to mobile-portable topics. Subscribers can access prior postings to review historical conversations and solutions. The list is administered by _dick at k7vc.com_ and operates on Mailman version _2.1.12_. Subscription requires email confirmation and offers optional privacy password protection, with an option to receive daily batched emails.

Introduction to Shortwave Antennas. Understanding Shortwave Radio Listening and Antenna Design and Construction

6m/2m/70cm Yagi Antenna Built from Old TV Antenna This turned out to be a great little antenna. It works the 6 meter, 2 meter and 70 centimeter bands. You can use one common feedpoint or two seperate feedpoints depending on how you would like to connect this antenna to your transceiver.

A collection of drawings of most popular wire antennas for hf ham radio bands

G4URH - Coax cable types, specifications and data

Italian amateur radio shop based in Sicily Island

The radio voice of Canada broadcasts daily programs in French, English, Spanish, Arabic, Chinese, Russian and Ukrainian, on shortwaves, satellite and via RealAudio.

Article from 73 Amateur Radio Today about experimenting on ferrite loops transmitting loop antennas for 80 and 160 meters bands.

Digital voice on Amateur Radio - devoted to the discussion of digitized voice and data over analog emission modes.

Magyar Radioamator Szovetseg

Irish Radio Transmitters Society

The _ISS Detector_ Android application, with over 5 million downloads, offers precise predictions for visible passes of the International Space Station. It notifies users minutes before an overhead pass, integrating local weather conditions to ensure optimal viewing opportunities. The core functionality focuses on the ISS, but in-app purchases extend its capabilities to track other celestial and artificial objects. Optional extensions, available via in-app purchase, allow users to monitor dozens of amateur radio and weather satellites, providing real-time transmitter information and Doppler frequencies. Additional extensions cover _Starlink_ satellites, the _Hubble Space Telescope_, rocket stages, bright satellites, comets, and planets, expanding the scope beyond the ISS to a broader range of observable space phenomena. The app's interface is designed for ease of use, displaying pass times, directions, and elevation. It adapts predictions based on the user's GPS location, ensuring accurate local forecasts. The latest update, dated April 3, 2026, includes corrections for magnitude values and various speed and stability optimizations.

QRadioLink is a Linux analog/digital SDR transceiver application with Codec2 digital voice mode support.

Amateur Radio Station M3PHP, Peter Goodhall.

SCCARA was formed as a general interest amateur radio club in 1921 and became a non-profit corporation in 1947.

Ham radio, Mir contact samples in Real audio, packet and some links

Taking the Raspberry Pi 2 for a Test Drive with GNU Radio. Installing GNU Radio and receiving aircraft radar with a USB TV tuner

A recognized organization of Murray State University providing programs and activities that promote interest in Amateur Radio within the campus and community.

Nightly Talk Around Net sparked many new ideals and has promoted Amateur Radio in our area with things like, ARES, Skywarn Classes, Field Day, VE testing, Internet and other events that bring our Hams together as one big family.

Minnesota Wireless Association, the Minnesota contesting connection.

HFpack provides an information exchange about transceivers, antennas, systems, HF packs, propagation, new developments and techniques in HF portable operation. Radio Amateurs are invited to participate in egroup and on-the-air nets around the world.

The Icom AH-4 autotuner operates efficiently across multiple HF bands, providing seamless automatic tuning for antennas from 3.5 MHz to 54 MHz. Its robust design allows for outdoor installation, making it suitable for field operations and fixed stations. The unit interfaces with Icom transceivers via a control cable, enabling automatic band switching and tuning. The AH-4 is capable of handling up to 120 watts of RF power, ensuring compatibility with most amateur radio setups. Its weather-resistant casing and compact form factor make it a versatile choice for operators requiring reliable performance in diverse environments. Field tests demonstrate the AH-4's ability to maintain low SWR across its operational range, enhancing signal quality and transmission efficiency. Compared to manual tuners, the AH-4 offers significant time savings and ease of use, particularly in rapidly changing band conditions. Its integration with Icom radios simplifies operation, eliminating the need for manual adjustments. The autotuner's performance is consistent with other high-end models, providing a cost-effective solution for amateur operators seeking dependable tuning capabilities without sacrificing performance.

Radio club S55W BURJA

Projects you can build, an amplified shaped sine-wave oscillator

A very brief introduction to microwaves, by Thomas D. Williams, Ph.D., radio amateur WA1MBA

Introduction to Raspberry Pi and possible usages in amateur radio, PDF presentation.

The only worldwide amateur radio repeater directory. Supports Android, iPhone, web, RT Systems, CHIRP GPS enabled. AvMap, Garmin, TomTom

The members of the Shoreline Amateur Radio Club reside in New Haven, Middlesex, and New London Counties.

An information paper by the International Amateur Radio Union, History of 40m allocation, propagation properties of 7 Mhz band