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Founded in 1976, the Aroostook Amateur Radio Association was organized to foster support for those people interested in the hobby of Amateur radio.

Info on OL4HQ contest club

Provide RF connectors, adaptors, antennas, accessories, mounts, coax, West Mountain Radio Products and Anderson Power Products available.

The Vintage Radio and Phonograph Society (VRPS) is a non-profit historical organization, incorporated in Texas, serving enthusiasts in the Dallas-Fort Worth area and surrounding regions. Its core mission revolves around the **preservation** and **restoration** of antique radios and phonographs, fostering a community for those with a general interest in early wireless technology and vintage audio equipment. The society actively supports the new radio/TV museum in Kilgore, TX, demonstrating its commitment to broader historical preservation efforts. Members engage in activities such as "Show and Tell" days, where they bring items for discussion, and participate in an annual convention. Events like the Spring Auction and the 2026 VRPS Convention, scheduled for October 23-25 at the Grapevine Convention Center, provide opportunities for members to connect, share knowledge, and acquire vintage pieces. The organization also highlights related events, such as the Houston Vintage Radio Association's 2026 convention.

Iambic and Straight key amateur ham radio CW Morse code practice oscillators for Android. This Android app gives you both straight and iambic CW Morse code practice key oscillators. Each key translates Morse code into English and CW prosigns in real time as you practice. Practice sending Morse code with a straight key oscillator. Settings include WPM, show/hide Morse code/text, choose sidetone 400Hz-800Hz. Adjust the WPM so that you can produce well formed DITs and DAHs at a comfortable speed.

German Amateur Radio Station DO8ER / DN7ML - DOK H05 Celle DARC / Wettersonden Hankensbüttel Germany (JO52HR)

Jefferson County Amateur Radio Club - Arnold, Mo

Article on how to use logic analyzers for testing complex logic-digital circuits

A netlist converter for moving schematic and PC board files from OrCAD/PADS to ExpressPCB format.

An inexpensive spectrum analyzer for the radio amateur, with a respectable performance and a quite good dynamic range. Schematic and basic information on how spectrum analyzers works.

The Yavapai Amateur Radio Club was established on July 18, 1991. That was the day the bylaws were accepted by a handful of area hams.

D-Start site sponsored by Icom Uk

Ham Radio Club in Wales UK

Wood County Amateur Radio Club (WCARC) serving Northwest Ohio. Meeting information, newsletter, repeater list, and resources for Hams in Northwest Ohio.

We supply and maintain radio systems. Anyone that requires a radio communications system can be confident that we can supply and maintain a scheme that is second to none

Stamford Amateur Radio Association Repeater Club. Located in Stamford, Connecticut.

Introduction to troposcatter or tropospheric scatter propagation using the troposphere

Ham radio club of Catalunya Spain Portal de la Radioaficio de Catalunya

RSGB article for beginners. How to build a dipole antenna, construction tips and correct setup of inverted-ve dipole antennas

Article based on ROHN engineering specification that will guide on proper guying heights and guy lengths when guying ham radio antenna masts. It will help you determine ahead of time the proper length of guy wires and the distance from the base of the mast to the anchor points

In order to determine total distance that a transmission may be received by two elevated antennas, we must add together the radio horizon distance of both antennas.

Located in the northern San Francisco bay area

A homebrew radio transmitter project, based and inspired by the original 30 Watts input on 80 50 and 15 meters band transmitter by W11CP

A diverse club of amateur radio operators from around Kentucky's Bullitt and Jefferson county areas.

The Eastman Amateur Radio Club (VE4TG) operates a **VHF repeater** at 146.73 MHz and a **UHF repeater** at 444.15 MHz, both located at the Manitoba Hydro gas-fired generating station near Selkirk. These repeaters are situated on the power plant roof, leveraging its infrastructure for antenna placement. The club's primary objective is to offer a reliable local repeater site for members in the East Selkirk and Lockport areas, ensuring consistent amateur radio access. Beyond routine communication, the club maintains a standby communications link to assist local municipal authorities during emergencies requiring communications support. The unique repeater site location at a generating station provides a robust backup power supply, enhancing reliability. The club also organizes activities such as a weekly net and participates in WARC Field Day, fostering community engagement and operational readiness.

Oklahoma City, OK

Approximately 524,475 Brazilian amateur radio operators are cataloged within this resource, offering a comprehensive database for the South American region. Each entry includes geographical coordinates, enabling users to visualize station locations directly within Google Earth. This functionality supports DXers in identifying potential contacts and understanding propagation paths relative to specific Brazilian QTHs. The platform serves as a digital callbook, primarily focused on the Brazilian amateur radio community. It facilitates the lookup of callsigns and associated location data, which is crucial for award tracking, contest planning, and general operational awareness. The integration with mapping services provides a visual dimension to traditional callsign databases, enhancing the utility for operators interested in geographical aspects of radio communication.

Serving Northwest Ohio Since 1954

Listen to the New Zealand 70cm National System.

The Saratoga Amateur Radio Association provides emergency communications for the City of Saratoga, and promotes amateur radio in the community.

A world-class amateur radio contesting club, is represented by two chapters in North Carolina and extends as far north as Pennsylvania and Delaware.

An incorporated, non-profit organization promoting amateur radio and serving the interests of communities in Bonner County.

Offer a Direct Digital VFO Kits (variable-frequency oscillator) using the Analog Devices AD9951 by WA1FFL

Ellensburg, Kittitas County, Washington, USA

The reading radio club Berks county PA

AMRAD is the Portuguese Association of Amateur Radio for Education Research and Development

An introduction to develpment of morse keys in radiotelegraphy history

k5eok Edmond Amateur Radio Society

Founded In 1938, The W.A.R.A. Has Been An Anchor For Amateur Radio Enthusiast Throughout North East Ohio.

Presents the personal amateur radio presence of W2CZ Efrem, offering a glimpse into their engagement with the hobby. The page serves as a digital QSL card, affirming participation in the global amateur radio community. It provides a direct connection to the operator, typical of early personal web pages in amateur radio. This resource functions as a static online identifier for the callsign holder.

Feidaxin FD160/FD150 repeater programming instructions

A practical guide to program Chinese Radios like Baofeng UB and BF series hanheld trnsceivers

Using a simple calculation, measure the distance between Earth and the Moon with the help of a local amateur radio station

The Brandon Amateur Radio Society serves the ham radio community in eastern Hillsborough County Florida.

RARA was founded in 1995 by a group of active amateur radio operators from several regions of the United States. Today, the club is international in scope with over 135 members around the world.

AmTOR may be considered as the next development from RTTY. AmTOR was introduced to overcome the problems with RTTY. As a result of its performance, it has become popular on the HF bands because it gives more reliable communication, especially when interference is present. It achieves this by using a coding system that allows errors to be detected and corrected.