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Calculates inductance and Q for single-layer coils made of solid or Litz wire. Uses U.S. or metric dimensions. Can automatically maximize Q. Includes accuracy data. Runs in Windows.

A web page devoted to the handicapped hams of the world.

Glenrothes and District Amateur Radio Club Scotland

Island of Hawai'i, British Columbia , QUebec, Canary Islands, Wisconsing, Florida lighthouses activations by F5IDM

Design a parallel square stock balanced transmission line with this calculator.

Amateur radio loop antenna project using a Comet CVBA-500BC vacuum variable capacitor.

Saskatchewan Hamfests Then and Now

Adapting a common PC earphone with microphone to connect to a transceiver via a homemade pre-amplifier, using a simple chip with aprox 10 db gain. Includes a schematic diagram

Common mode currents are those currents that flow in the same direction on a wire bundle, as opposed to the currents that flow

This article documents the author's latest go-box build for outdoor ham radio operations using a Yaesu FT-891 transceiver. The go-box is constructed from a plastic "50-cal ammo case" and contains various components, including the transceiver, LDG Z11 Pro autotuner, DIY Yaesu FH-2 remote control keypad, and an external battery. The author details the design considerations, the mounting of components inside the box, and addresses issues related to ventilation and cable management. The go-box is geared for CW operations and POTA activations, with further modifications planned for a microphone and DATA jack. This project allows for rugged, environmentally protected outdoor radio operations while maintaining portability.

The Primary N6OCS Repeater is located at 5700 feet on Santiago Peak in the Santa Ana mountains.

Austin Hams - Your Ham Class Headquarters for Bell, Hays, Travis, and Williamson Co.

The purpose of this blog is to help new hams and promote amateur radio

Amateur Radio Amateur Radio Manuals & Books Computer Books & Programs Computer Hardware Rare & Hard to Find Books amateur radio,electronics ,electronis parts,tubes, amplifiers,towners, beam antennas and more

Coastal Amateur Radio is for hams south of the Fraser. Even if you live north of the Fraser you are welcome to join in. Hams who come together for the love of HF & VHF in the hobby.

The magnetic loop, thus named by the use of the magnetic component of the electromagnetic field, is a parallel circuit LC. In this article a sample project to home made a custom antenna. The circular form is often met on the commercial models but this antenna can be hexagonal, octagonal or square.

927.1250 MHz Santiago Peak, CA USA

Reference site of the HAMVOIP AllstarLink AllstarLink provides hams with a means of connecting radios, repeaters or simplex links, over the internet. It is built upon the asterisk open source PBX and runs on Linux

A personal blog about amateur radio activities, including homebrew, bitx, ubitx, mcHF, JT65, FT8 and more digital communications.

Taken from: Brief History of Amateur Radio in Calcutta-by Avinash Missra, VU2EM

Check out these vintage QSL cards from the 20th Century in this gallery of old QSL cards.

Our club has been setting the pace for Amateur Radio in Cleveland County and Shelby for over 50 years.

The New Hampshire QSO Party is sponsored by the Port City Amateur Radio Club (PCARC) to promote Amateur Radio activity within the State of New Hampshire. Each year the NH QSO Party is held on the second full weekend of February.

Unlike older radios, the 706 uses only one crystal oscillator (called the Master Oscillator). All other frequencies in the radio (L.O., 3-4 I.F. stages, VFO, and CW-offset) are computer-derived from the Master Oscillator. This makes it relatively simple to frequency-align the radio, so that it agrees with the Frequency Display in all modes.

An introduction to NPR by Daniel Estevez. In this blog article Daniel EA4GPZ / M0HXM, introduce the new IP communication protocol over the 70 cm amateur radio band. Daniel is an experienced operator on IP on 430 MHz with CC1101 and Beaglebone black project and makes a good comparison of the two projects.

A windows program to learn Morse code and doing QSO in CW. The training course contains 39 Lessons based on Koch method. It can sends only letters, only numbers, only punctuation

Article about accessing repeaters, how repeaterss works, and properly using an amateur radio repeater

How to set new squelch values on Baofeng HT Radios by using the CHIRP software. Make sure you save the original configuration before editing squelch levels. Edit at your own risk.

Wireless Society of Southern Maine Projects, instructions and photos for many ham radio projects and experiments, including antenna construction and modelling, kit building, station setup, restoration and more

Swiss flora and fauna award

I wanted to mount an amateur radio antenna on my truck that was more permanent than the magnetic mount on I already had, but I had a few specific design requirements for the project.

Ham radio, amateur radio, satellite communication, radio, radios,antenna, antenna design, yagi, cross yagi, power divider, splitter, Brisbane.

Muskegon County October Color Tour Hamfest. OCTOBER 13, 2012 in Muskegon, Michigan

Filters and replacement parts for the Drake R-4C receiver by Sherwood Engineering Inc

Official web site of the Youngsters On The Air Italy 2015

Kay County Amateur Radio Club Incorporated in the State of Oklahoma Jan. 1960 W5HZZ

An end fed antenna winder design that also contains the necessary matching toroid. This would be just the thing to throw in your backpack for portable operation.

JE1TNL blog

A HF power amplifier with a push-pull of AFT09MS015N. The (small-signal) gain of the amplifier is around 26 dB in the lower HF band and goes down to about 24 dB on the higher end and still around 21 dB at 50 MHz. Its input matching is relatively good at the lower HF and degrades above 10 MHz.

A news site focused on DXing and contesting, DXNews.com provides daily updates on upcoming **DXpeditions**, contest announcements, and general **amateur radio news**. The site features a continuously updated feed of articles detailing call signs, operating dates, IOTA references, and specific contest participation plans for various DX operations. Content includes detailed reports on planned activities from rare and semi-rare DX entities, often with information on operators, bands, modes, and QSL routes. It also covers major amateur radio contests, offering insights into rules, participating stations, and results. The archive depth extends back many years, providing a comprehensive historical record of DX activity. This resource is ideal for experienced DXers and contesters seeking timely information to plan their operating schedules, track rare DX entities, and stay informed about the global DX scene. It also serves general amateur radio operators interested in following significant events and operations within the DX community.

A Radio Society of Great Britain affiliated Club

Run Morse Runner on Apple MacOSX computers using Wineskin. Morse Runner is a popular MS Windows morse code contest simulator. You can do this by yourself or just download the ready-made dmg and use it on your apple mac.

how I learned to stop worrying and love the magic smoke

Volunteer group registered by the ARRL/VEC that conduct FCC amateur radio license examinations in Yokohama.

Malcom Technical Support Radio Electronics Repair, ICOM Authorized Service Center, also service 1988 and newer Kenwood HF/VHF/UHF transceivers based in Toledo, WA USA

Building A Full-Wave Quad Loop Antenna for 6 Meters. This is an easy antenna to build and the materials cost about $15-20. It exhibits 1.8dB gain over a 1/2-wave dipole. Using an open-wire parallel feedline (commonly called ladder line) with an antenna tuner, it tunes up on the 10m band as a 5/8-wave loop as well

Frequency coordinations on BC Canada

The Camb-Hams are an informal group of Cambridgeshire Radio Hams.

Ham Radio & technology for people with disabilities