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Demonstrates the capabilities of CW_Shark, a dedicated 32-bit Windows application for Morse code operations. This software facilitates the analysis, decoding, and encoding of CW signals, providing hams with a versatile tool for various aspects of amateur radio communication. It supports four distinct modes: Decode Only, Keyboard QSO, Straight or Paddle Key QSO, and Straight or Paddle Key Practice, catering to different user needs from passive listening to active keying. Operators can utilize the Decode Only mode for signal analysis, while the Keyboard QSO mode allows for text-based interaction. The Straight or Paddle Key QSO mode offers a direct interface for traditional keying, enabling real-time communication. For skill development, the Straight or Paddle Key Practice mode provides a structured environment to hone Morse code proficiency. CW_Shark integrates essential functions for CW enthusiasts, supporting both learning and active participation in Morse code exchanges. Its focused design aims to assist operators in mastering and enjoying the art of _CW communication_.

The Largest Selection of Cable Assemblies and Accessories. Coaxial Cables, Fiber Optic Cables, Connectors, Attenuators, Terminators, and Tools.

ACOM 1000 160-6m amplifier specifications and features

Thanks to the popularity of cell phones, laptops and other personal electronic devices, the battery industry has been market-driven to produce higher capacity batteries in lighter weights than previously possible with yesterday's chemistries.As a result, a wide variety of battery types are available to the outdoor QRP operator.

Commercial and Private Two Way Radio Communication equipment manufactured specifically for the United Kingdom, Europe, African, Asian and the USA markets.

Constructing a dip oscillator provides radio amateurs with a fundamental piece of test equipment for resonant circuit analysis. This particular design, adapted by VK3YE from a concept by _Drew Diamond VK3XU_, details a practical build using readily available components. The unit incorporates four plug-in coils, covering a frequency range from **2.6 MHz to 55 MHz**, mounted on 5-pin DIN plugs for versatility. A salvaged two-gang air dielectric variable capacitor, fitted with a vernier reduction drive, serves as the tuning mechanism, with the smaller gang optimizing bandspread at higher frequencies. In practical application, the dip oscillator is used by setting the meter needle to approximately two-thirds scale. When the instrument's coil is brought near a tuned circuit under test, a noticeable dip in the meter reading indicates resonance. This allows for precise measurement of resonant frequencies in antennas, filters, and other RF circuitry, proving invaluable for homebrewing and troubleshooting. The design emphasizes short wire runs for stable operation, particularly at the higher end of its operational range.

Article describes a circuit that accelerates the coil of DC relays by momentarily doubling their voltage.

Makers of the The Polar Explorer transmitter, which operates on 9 HF bands from 160 through 10 meters and is capable of 500 watt peak output power on SSB, CW, AM, FM and RTTY. It is intended to be used in conjunction with a transceiver.

AR5X review of popular CW QRP transceiver kits

Twenty-four repeaters, including D-STAR and Fusion systems, are maintained and operated by MARCA Inc., primarily located on Arizona mountaintops and around the Phoenix metropolitan area. The organization, holding the callsign _W7MOT_, facilitates a wide range of amateur radio activities, such as ARRL Field Day events near Forest Lakes, Arizona, and participation in ARRL FMT contests. Members engage in antenna experimentation, construction, and maintenance trips to repeater sites. The club's interests span diverse topics, including HF voice, digital modes like _WSPR_, _WSJT-X_ (FT8, FT4), and CW, alongside DXing, MESH networking, and EOC operations. It supports technologies from SDR radio building to antique radio restoration and computer-based operations like Echolink, fostering a Single Board Computer (SBC) and Raspberry Pi group. Monthly meetings, held on the third Tuesday, feature business discussions and guest presentations, with informal summer gatherings and an annual holiday dinner in December. Monthly VE testing sessions for Technician, General, and Extra Class licenses are conducted by Ray Vasquez, K4RMV. Post-meeting discussions often cover specialized interests such as repeater operations, technical topics, D-STAR, SDR, APRS, Fusion, and Raspberry Pi projects.

Things on the occasion of amateur radio activity only

A nice guide to make basic contacts in morse code with a particular reference to SOTA operations by VK3BQ

HamBlog is a weblog host for Amateur Radio operators.

Radio 2 Radio broadcasts amateur & HAM radio news and current events from around the world.

Noise Canceller kit originally developed about 1989 by G4WMX and GW3DIX and improved by DK9NL and DG0KW.The VK5TM Noise Canceller is another version of the design, with the HF Vox circuit removed and a couple of other minor changes, including the use of SMD JFETs and a double-sided pcb.

On-Line VP8CRB DXpedition Log

A simple portable antenna for SOTA VHF is described in this article dedicated to portable operations

Rack Mounts for ham radio transceivers and receivers

QTH.COM by KA9FOX offer classified swap ads for amateur radio and web design along to evoluted web hosting

K5DKZ review of the Kenwood TL 922A

YU7EF 8 elements yagi antenna for 4 meters band

A member of the adventure radio group

A home made 4 element yagi antenna that can be easily adapted for 10 meter band

Ezty rope clamp manufacturer making your rope and anchor line tasks simpler. Custom made products for all your boating needs. ropes lines, rope clamps, dock lines, end tips, sleeves, sliding locks, clamps, hooks, plastic hooks, tie down kits

A youtube video instructions on how to replace, the Select knob. Very often this know wobbles after some years of usage and in this video is well documented all passages needed to replace the knob.

Laser Engraved, Etched and Marked gift items for Amateur Radio Operators

Introduction to NVIS antenna and NVIS propagation. A simple NVIS antenna can be constructed as shown in this article

CW-R Explained. CW reverse mode CW-R receives CW signals with a reverse side CW carrier point like that of LSB and USB modes

Home of the Radio Teacher Project Website, study guides, class documents and videos to be used by instructors

The Matanuska Amateur Radio Association (M.A.R.A.) is a general interest amateur radio club, with approximately 100 members, our members are involved in every aspect of amateur radio.

Morse code quote of the day

Python functions for converting decimal coordinates to QTH locator and backwards. Useful for program software developers to determine grid square locator, also known as maidenhead locator system.

Enables every Ham to easily find repeaters across the the World, USA, Canada, Mexico and over 35 other countries, for free and without a network connection using the RepeaterBook Directory.

This article describes the development of two tunable antennas each consisting of three interconnected small loops and capable of providing excellent DX performance. The aerials are home-constructed, and located in a very small garden with a minimum of visual impact on the neighbours and are low enough in height to avoid the attention of UK planning authorities.

Learnings from the 6Y4A CQ WW CW Contest By K2KW and N6BT

222 MHz kilowatt linear amplifier

Off Road Enthusiasts that use Amateur Radio for recreation and public service.

Over 100 trained amateur radio operators comprise the New York City Amateur Radio Emergency Communications Service (_NYC-ARECS_), an auxiliary communications service dedicated to providing vital radio links during local, regional, or national civil emergencies. This organization supports governments, civil-preparedness, and relief agencies in situations such as power failures, explosions, fires, floods, earthquakes, or terrorist activities. Their operational readiness is critical for maintaining communications when conventional infrastructure fails, leveraging the resilience and adaptability of amateur radio. NYC-ARECS actively participates in the NYC Office of Emergency Management (_OEM_) Partners in Preparedness program and is a member of DHS FEMA's National Preparedness Coalition, demonstrating its integration into broader emergency response frameworks. The group's activities include regular training, maintaining operational readiness, and deploying communication assets across the five boroughs of New York City. Their efforts ensure robust, independent communication channels are available to support disaster relief and public safety operations.

NOAA-19 APT Recption using GNU Radio and a FUNcube Dongle

Receiver dynamic range is the ability of a receiver to receive a weak signal without loss of readability while a strong signal is present.

The Information Source For Makers, Experimenters, DIY, Home Brewers, Restorers, and Amateur Radio Operators

Online morse code conversion tool

Manufacturers of professional Civil & Defense UHF/VHF Base Sation Antennas,Installation Hardware, Power Splitters and Distributors of EUPEN rf Cable & Connector products.

Tuning HF Coaxial Antenna Traps

Using external usb sound card devices for amateur radio digital modes operations

Amateur radio makes the world a much smaller place.

VK3RVZ IRLP Node 6506, covering the Port Phillip bay area and inner suburbs

Both Watts and Volt-Amperes are units of measurement for electrical power. Learn what is the difference

How to correct keyclick problem in ft1000 and ft1000d radios.

How to home made antenna traps with material you can easily find, and how to properly tune it.