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Allow you to create Tower Coverage Maps for any geographical area in the entire world. Maps are based on region and topography, taking into account for hills, mountains and trees. Commercial software allowing a free map trial

CW transceiver kits, QRP, frequency counters, QRP wattmeters, Dummy loads and QRP Parts

Amateur (Ham) Radio Club in Sacramento, California

Pittsburgh's largest ham radio site.

Foothills Amateur Radio Society

NHARC serves the Amateur Radio community in the greater Pittsburgh area USA.

Adam Brown's Blog from Latitude 80.19 South Longitude 81.16 West

Operating as a local amateur radio club, the Wireless Association of South Hills (WASH) provides a community hub for hams in the Pittsburgh, PA area, identified by the N3SH callsign. The club engages in a range of activities including the Annual Field Day, the PA QSO Party, and a 2 Meter Contest, fostering participation in various aspects of the hobby. WASH also supports local ARES/RACES efforts, highlighting the critical role of amateur radio in emergency communications during disasters, and facilitates ARRL/VEC exam sessions for new licensees. Beyond contests and emergency preparedness, WASH hosts club picnics and an annual hamfest, promoting social interaction among members. The club maintains VHF/UHF repeaters, which are essential for local communication and extending range for members. Regular activities include a Monday evening WASH NET at 8:00 PM, providing a consistent on-air gathering point. The club's focus on both recreational and public service aspects of amateur radio, from making new friends to providing vital disaster communications, underscores its comprehensive approach to the hobby.

The Highland Amateur Radio Association (HARA) centers itself in Hillsboro, Ohio.

Serving the needs of the Amateur Radio Operators in Charlotte, DeSoto, Hardee, Highlands, Hillsborough, Manatee, Pasco, Pinellas, Polk, and Sarasota Counties.

Currently operate 3 repeater locations in Dix Hills, Huntington and Smithtown on 2 Meters, 1.25 Meters & 70 Centimeters.

Located in the northeastern corner of New York State Between the shores of Lake Champlain and the foot hills of the Adirondacks

Sheriff's Tactical Amateur Radio Communications Hillsborough County Sheriff's Office Amateur radio in law enforcement

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

You'll find information about the club, membership, our newsletter, the BARC repeaters, and special club events.

QRP CW transceiver Kit for 20 or 40 meter band, by OKA Hills Research, assembly history and description

The Hidden Valleys Amateur Radio Club is a small friendly club located in the hills and valleys of Southwestern Wisconsin.

Hoosier Hills Radio club

Greensburg, Pennsylvania

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

The Radio Club of the Watchung Hills Area - New Providence NJ

Illustrates the fundamental principles of radio repeaters, detailing their role in extending communication range beyond line-of-sight limitations. It begins by defining _simplex communication_ as a direct radio-to-radio link, effective only when no obstructions impede the signal path. The resource then introduces the concept of a repeater (or base station) strategically positioned on elevated terrain, such as a mountain, to overcome geographical barriers. The article clarifies the repeater's operational mechanism: it receives a signal on one frequency and simultaneously re-transmits it on a different frequency, enabling users on opposite sides of an obstruction to communicate. This _duplex operation_ is likened to satellite communication for VHF propagation, but with a fixed terrestrial station. Specific examples of signal paths are provided, showing how a handheld radio transmits up to the repeater, which then relays the message down to another user, effectively bypassing obstacles like hills or large buildings.

This is an open repeater for everyone to use. Auburn Hills, MI

The East Pasco Amateur Radio Society is located in Dade City, Florida and also serves the eastern Pasco communities of Lacoochee, Saint Leo, San Antonio, Wesley Chapel, Zephyrhills as well as communities outside Pasco County like Brooksville and North Tampa.