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DragonOS is a linux distribution dedicate to Software Defined Radio. It leverages the portability, security, and power of Lubuntu Linux as a delivery package and operating environment for a pre-installed suite of the most powerful and accessible open source SDR software. DragonOS has verified support for a range of inexpensive and powerful SDR hardware, including RTL-SDR, HackRF One, LimeSDR, BladeRF, and many others.

Variable Power Supply for the bench

PACTOR can be viewed as a combination of two earlier digital modes, packet radio and AMateur Teleprinting Over Radio (AMTOR). PACTOR provides improved throughput because its transmission speed adapts to the quality of the link and it uses Huffman compressed characters.

W8NWS is the Cincinnati, Ohio chapter of Skywarn.

Two cheap CMOS ICs and a few transistors was all that was required to rebuild an elderly TTL automatic morse keyer into a low current lightweight battery powered iambic morse keyer.

The ANAN series SDRs are based on the OpenHPSDR open source designs, these are 4th generation radios and represent the state-of-the-art in current Amateur radio SDR design.

Popular italian amateur radio forum by ARI Fidenza include a section dedicated to swap and sell

The official website of the Benelux DX-Club (BDXC), a club of radio listening amateurs, founded in November 1961

Covers 10m 12m 15m 17m 20m 30m 40m and 100 KHz on 80m, & WARC Eham Reviews

New and used test equipment, oscilloscope, spectrum analyzers, multimeters, signal generators, power supplies, network and signal analyzers and more

Microphone tips for the Icom 706MkIIG

How to take the IF from a Kenwood TS-480

Vhf and UHF homebrewers of hardware and antennas. Find help, idea, or someone with just the same interest as you.

Audio Repeater is a windows application tha allows you to transfer, transmit, sounds from an input audio endpoint or device to an output one Playback. Audio transfer can be performed in any PCM audio format supported by Windows. KS version communicates directly with audio driver, bypassing all additional Windows audio processing

A battery voltage booster project with pictures and schematic by KD7W

By by Larry Wolfgang WR1B in QST Archives at ARRL

Fox November DX'rs Radio Group

The Frankford Radio Club originated in the Frankford High School, in Philadelphia, around 1927.

Radio Amateur Association of Greece

Master the Ham Radio license exams with Ham Technician, Ham General and Ham Extra! With these free iPhone applications, you will take the test with confidence.

The correct way to calibrate the MFJ-259B analyzer

"Instruments & Systems for Weather & Water Monitoring; weather stations, wind alarms, sensors for wind speed, wind direction, precipitation, temperature, relative humidity, barometric pressure, solar radiation, evaporation, rain & snow gauges, lightning detection."

The TS-570 review by Arend , PA1ARE

The international service of Czech Radio offers a broad, unbiased, and up-to-the-minute picture of life in the Czech Republic.

Getting squeaks and squawks from your H-T? Are pagers crunching your mobile rig's front end? Here's how intermod happens--and how to fight back!

A friendly and open group that likes to organize DX-expeditions like F/ON6JUN/P, OZ/OR0MO

Presents the VHFDX.EU web cluster, a specialized resource for VHF, UHF, and microwave DX spotting. It details the cluster's functionality, including real-time spot aggregation and a DXCluster Map interface for visualizing activity. The resource highlights its integration with the MMMonVHF backbone, ensuring a robust data flow for monitoring band openings and propagation events across higher frequencies. It also references reviews of the ON4KST and N0UK chat systems, which are frequently used in conjunction with VHF DX operations. The platform offers a mobile-optimized view for on-the-go access to DX spots, catering to portable and mobile operators. It further provides daily ES (Sporadic E) spot summaries, a critical feature for VHF operators tracking this specific propagation mode. The cluster serves as a central point for operators to share and receive information on rare grid squares, contest activity, and general band conditions above 50 MHz.

VK port-a-log is an Android logging app primarily for portable logging. It can be used for SOTA, WWFF or portable operations.

Supplier and exporter of generator, diesel generator, petrol generator, industrial generator, silent generator, power generator, electricity generator, gas generator, air cooled generator, gensets 1kva, 2kva, 5kva, 10kva, 50kva, 100kva, 250kva

Refurbishing my 10 years old Cushcraft A3S triband HF Antenna

NOAA HRPT - High Rate Picture Transmission, the main source of high quality data from polar orbiting meteorological satellites

A lot of good things, not for QRP fans.

Kenwood TS-2000 Transmit / Receiver eSSB Modifications by N3GX

Worldwide sellers of vacuum tubes and electron tubes for audio, radio, and industry

The ARRL Contest Results Database serves as a centralized repository for official scores and detailed breakdowns from numerous ARRL-sanctioned operating events. This resource typically features comprehensive listings of participants, their submitted logs, and final standings across different categories, modes, and bands. It allows hams to review their performance, compare results with other operators, and analyze contest trends over time, providing valuable insights into competitive amateur radio. Historically, the database has showcased the efforts of thousands of contesters, from single-operator entries to multi-operator, multi-transmitter stations. While the current status indicates scores are not immediately available, the database's primary function is to archive and present the outcomes of events like the ARRL DX Contest, Sweepstakes, and Field Day. This historical data is crucial for tracking individual progress, identifying top performers, and understanding the competitive landscape within the amateur radio community.

We have a wide range of power protectors and surge protection products available

A very exaustive and complete article on JT65A and JT65-HF operating mode, including software download links, installation notes, how to make JT65A QSO and videos to correctly work with weak signals by NW7US

West St. Louis County Police and Fire Live Audio Feed

Snake River Amateur Radio Club

Stryker 10 Meter Amateur Radio trasceivers, antennas and accessories manufacturer

Fabrice personal page

A non-profit public service and educational amateur radio organization specializing in advanced and experimental microwave communications.

Homemade dipole antenna for portable use

eham review of the ICOM IC-756PRO

RSGB World Prefix Map - Radio Amateur's Map of the World

Replacing the Yaesu FT100D SRF7043 VHF/UHF RF MOSFET Power Amplifier

More than 400 Dutch Hamradio links

quality Quartz Crystals, Clock Oscillators, VCXO's and TCXO's

Two tables comparing several coax cables on attenuation and power ratings

Effects and intereferences caused by LED lights in the shack