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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.

Linked Repeater System in Darby, PA

ACOM 1000 160-6m amplifier specifications and features

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

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

Adding a 20m band pass filter for the Icom IC-706MkII(G) by ON7EQ

Pignology is mainly an app developer focused on ham radio related topics. Offers radio remote control devices, and develop apps for them along to logbook apps and other ham radio related utilities.

The amateur radio club of el cajon is a group of persons from all walks of life with a command thread amateur radio.

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

Online calculator for Input coil data, LC Resonant Frequency and L match

A list of active Amateur Radio satellites grouped by FM SSB/CW and satellite monitoring

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.

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.

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

HamBlog is a weblog host for Amateur Radio operators.

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

MorseExpert 1.15 decodes Morse Code audio to text, leveraging algorithms from CW Skimmer for optimal performance on weak, fading signals amidst interference on amateur radio bands. It processes audio from the device's built-in microphone or an external radio receiver via cable, optionally highlighting Ham callsigns and keywords. The application features a waterfall display with a bandwidth of 200-1200 Hz, decodes frequencies between 300-1100 Hz, and supports keying speeds from 12-45 WPM with automatic CW pitch detection. Recent updates include support for Android 15, edge-to-edge mode, improved stability, and a pause decoding button. A premium version offers an ad-free experience and user-selected text colors. Users can switch between General Text mode and Ham Radio QSO mode, which enhances word segmentation and highlights callsigns. The app also includes a frequency lock mode, text selection capabilities for copying, sharing, or saving decoded text, and provides guidance on reducing acoustic echo and constructing an audio attenuator for optimal radio interfacing.

Improving your own signal quality by GM3SEK

Dedicated to the Preservation and Enjoyment of Vintage Radio and Wireless Equipment Serving the greater Portland, Oregon area

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

ARRL documentation on how get reciprocal lincece or authoriazion to operate ham radio abroad

The RRDXA is the Amateur Radio Contest Club in the western part of Germany and the BENELUX-Countries

Tuning non-resonant antennas and usage of such technique during contests.

A nice presentation for beginners by Radio Club of Tacoma

Welcome to the KC Club of Fort Worth, W5SH Website. Ham Radio fun for all.

The official web site for the santa clarita amateur radio club.

Things on the occasion of amateur radio activity only

Goshen, Indiana

The normal way to make a good balun is to wind a core with a bifilar winding about 8-10 turns, and then connect the coax to one side and the antenna to the other.

Rack Mounts for ham radio transceivers and receivers

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

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

IOTA from Island

A member of the adventure radio group

Converting the GN9120 Wireless Bluetooth Interface for Amateur Radio

Construction of 28 MHz to 144 MHz Transmitting and Receiving Converter by KP4MD

An economical way of building an SSB filter. The circuit is for a filter with a 6 DB band width of roughly 2.2 KHz.

CMARC has been serving the greater Columbia and Montour region for over 25 years.

Voice of the Communist Party of Iran

CT2ADIF converts a CT contest log .BIN file to ADIF.

ATV products manufacturer, antennas, ATV transmitters, SWR meters, amplifiers

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.

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

Russian amateur radio dealer for major ham radio brands like ICOM KENWOOD YAESU, MFJ, RigExpert

A shortwave radio listeners log book runs on Windows and MacOS Catalina and above. The KB6IBB SWL Logger is a program designed for the shortwave radio listener. It offers shortwave specific logging of stations, with most tasks handled automatically. The program also incorporates the use of EiBi shortwave database for logging and looking up various known shortwave stations world wide.

The Las Vegas Radio Amateur Club operates the K7UGE repeaters on 146.94 and and 448.500. Repeater is located on top of the Las Vegas Hilton Hotel & Casino, the UHF repeater is located on top of the Tropicana Hotel & Casino.

Mods for Kenwood TS-950SD / SDX

Work 19 departments of RepAblica Oriental del Uruguay