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Crystal radio home made projects by DL2XM

Lone Star Amateur Radio Association

Ham Radio Ads from France by F1UFY

Radio Amateurs of Greater Syracuse is an organization involved in promoting public service, fellowship, and ham radio in general, in the Syracuse, NY area. This site provides information, news and events of interest to hams in Central New York.

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.

Founded in 1933 in Flint Michigan

This article describes the construction of a high performance transmitter and receiver for SSB (voice) communication covering the 14MHz (20 meters) high frequency amateur radio band with output range 15 to 20 watts and a top audio sound quality both on transmit and receive.

The Kentucky Contest Group (KCG) website, maintained by N4GN, serves as a hub for amateur radio operators interested in **radiosport** contesting within Kentucky and southern Indiana. It details the group's dedication to promoting contesting, offers links to KCG officers, membership rosters, and upcoming meetings, and provides access to an active KCG e-mail reflector and Facebook Group for member communication. The site also features a comprehensive list of N4GN's recommended ham radio web picks, covering various categories like contesting resources, DXing, VHF/UHF/Microwave, and propagation information. The KCG's map center coordinates were updated on May 16, 2015, shifting approximately 16.5 miles SSW to 37° 21' N, 85° 39' W. Despite acknowledging current inactivity and an outdated web presence, the group remains operational, exploring options for reorganization, including a potential merger with the Tennessee Contest Group (TCG), which was ultimately rejected. The site emphasizes that membership applications are considered from anyone with a genuine interest in contesting.

NWRS North Wales Radio Society

G8YMM Amateur radio web site with interest on ATV

Dundalk Amateur Radio Society. Ireland Calsigns EI7DAR EI0W

The Exeter Amateur Radio Society has been growing since 1920 when it was born as the Exeter and District Wireless Society.

Clay County Missouri

CCARS - Camden County Amateur Radio Society. Supporting the Department of Homeland Security's Emergency Communications Initiative while promoting Amateur Radio activity and fellowship in and around Camden County Georgia

Miscellaneous ham radio stuff from K2DBK

2-Meter Weak-Signal Enthusiasts

With the new name TRANSRADIO, the former TELEFUNKEN SenderSysteme AG enters into the new digital age of Broadcasting – DRM.

Receivers and transmitters by Collins , Drake , Hallicrafters , Hammarlund , National Receivers

The Society Radio Operators, Chicago Illinois

Developing operational amateur radio equipment for the 134 GHz band presents significant technical challenges, particularly in frequency generation and stability. This resource details the construction of a 134 GHz system, outlining its architecture with separate transmit (Tx) and receive (Rx) modules, each employing a local oscillator (LO) and RF head units. The system utilizes a dual Flann 50 GHz lens-type horn antenna configuration for optimal signal coupling. The transmit path incorporates an LMX2541 synthesizer chip operating at approximately 2.8 GHz, referenced by a 10 MHz double-oven Morion OCXO for exceptional stability. This signal is multiplied through a series of stages (X4, then X2) to generate a 22.4 GHz signal, which subsequently drives a dual series diode multiplier to produce the final X6 signal for 134 GHz operation. The receive side features an anti-parallel diode mixer coupled to a 144 MHz transceiver via a preamplifier, ensuring effective downconversion. Operational mode is CW, achieved by keying a multiplier stage. The project includes images of the Tx and Rx head units and describes a successful 3.5 km test with G8ACE, demonstrating stable signal tones due to PLLs locked to OCXOs at both ends, confirming the system's robust performance.

Ham Radio Outlet South Africa based in Port Elizabeth

Showcasing innovative RF solutions, Hofi Hochfrequenztechnik manufactures high-quality _antennas_ and RF switches. Their products, including the **versatower** and **fritzel** brands, cater to both casual operators and serious DXers. With a commitment to performance, Hofi's offerings enable operators to achieve optimal signal gain and reliability in various conditions. The company's expertise in antenna design ensures that users can effectively communicate across _HF_ bands, enhancing their overall operating experience. Whether setting up a new station or upgrading existing equipment, Hofi provides essential tools for successful ham radio operations.

SZ2PRO - Exemplary Radio-amateur Club Greece

The elgin amateur radio society Illinois

We an an Amateur Radio Club in North Central Pa.

Are you confused when it comes to using toroids? The tips given in this article may simplify your next project. Comprehensive article about choosing the proper toroid.

The Nanaimo Amateur Radio Association is made up of members of the community stretching from Courtenay to Duncan on Vancouver Island.

Approximately 30 active members comprise the _Racine Megacycle Club_, W9UDU, a long-standing amateur radio organization based in southeastern Wisconsin. The club provides a local hub for hams interested in various aspects of the hobby, including contesting, DXing, and technical experimentation. Regular meetings offer opportunities for knowledge exchange, project collaboration, and social interaction among licensed operators. The club actively participates in public service events and promotes emergency communications preparedness within the community. They often host field day operations, providing hands-on experience with portable setups and demonstrating the capabilities of amateur radio to the public. Membership is open to all licensed amateur radio operators. Their website serves as a central point for club news, event announcements, and contact information, supporting the club's mission to advance the art and science of amateur radio.

the Watertown Amateur Radio Club located in Watertown, Wisconsin.

Houston Ham Radio Club BVARC is an amateur club located in the southwest Houston Texas area

When a broadcast antenna is to be placed on top of a building, there are special problems of feeding and grounding. The radiator is usually electrically short, that is, much less than one-quarter wavelength high.

Provides this Web site as a public service to all radio amateurs within the city of Huber Heights and the Miami Valley of Ohio.

A 70 MHz Transverter project with a block diagram and schematics

Open to employees and retirees of Avaya Inc. in Lincroft NJ. As Avaya Inc. was spun off from Lucent Technologies, AT&T Bell Laboratories, and even Western Electric

This page provides a list of scanner frequencies for hams in the UK. It offers a comprehensive guide for ham radio operators looking to find and tune into various frequencies for communication. The page is useful for hams who want to explore different channels and connect with fellow operators in the UK. Whether you are a beginner or an experienced ham radio enthusiast, this resource can help you discover new frequencies and expand your communication network.

Licence types in Australia and How to get a licence.

Introduction to packet radio and answers to common questions about this digital mode and about services you can use by VKFAQ

Amateur Radio Full Disclosure

The Hermiston Amateur Radio Club evolved from an informal coffee break in the late 1970's. The group met to discuss amateur radio topics and to support the 147.03 repeater. It was located at Ernie Netter's on Loop Road.

Hawaii Amateur Radio Club

This is a page to detail how I remotely operate my Elecraft K2 HF transceiver via my home network. The method used should apply to pretty much any amateur transceiver that can be controlled by serial port.

Sydney Amateur Radio Club, Sydney NS, Ham Radio in Cape Breton, IOTA NA-010, Nova Scotia

The West Chester Amateur Radio Association (WCARA), operating under the callsign WC8VOA, functions as a division of the _National Voice of America Museum of Broadcasting_. This organization actively promotes amateur radio, providing essential facilities for members and guests to convene and exchange technical information about the hobby. The club's primary focus includes fostering community engagement and sharing operational knowledge among enthusiasts. WC8VOA maintains a dedicated ham shack, facilitating on-air operations and technical discussions. Members utilize these resources for various amateur radio activities, including contesting and DXing, contributing to a vibrant local radio scene. The association's commitment to education and hands-on experience strengthens the amateur radio presence in the West Chester area, supporting both new licensees and seasoned operators.

Radioklub Nokia is the Amateur Radio Club Station for Nokia employees and family in the Dallas - Fort Worth area in Texas, USA.

Amateur Radio Transmitting Society located in Louisville, KY