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Various configurations of the Z Match Tuner are tested for power efficiency over a wide range of antenna load conditions

The Mt.Vaca Radio Club (Call sign K6MVR ) owns and operates repeater systems in and around Sacramento, California. The systems provide reliable coverage for mobile stations throughout the Sacramento Valley region and beyond to Modesto, Chico, the Sierras, and parts of the Bay Area.

Problem width the memories, TS-570 Batteries, MARS/CAP Modification

Ferrite rod antenna or aerial, a form of RF antenna that is widely used in RFID and transistor radio applications.

Cannot record CW message, AFSK not working, tracking not working, meter peak hold, on Yaesu FT-920.

Amateur Shortwave Radios Links and information,Also Swap Radio Groups Bearcat-scanner Drake Radios Hallicrafters and more

A google map of the UK amateur radio repeaters with clickable information

Blog postings about the Yaesu FT-450 at I0GEJ blog

According to wikipedia a software-defined radio is a radio communication system which uses software for modulation/demodulation of signals

TM-241A RX/TX mods The TM-421 a is capable of transmitting from 136 to 174 MHz when the following modification is performed

Extremely reliable FET preamplifier can handle several watts directly into either the input or the output without failure

This scheme can be used to combine two antennas

Ideas and notes on designing a SO2R radio shack room. Includes lots of radio shack pictures used by K8ND as ideas to plan his new radio shack, with contesting in mind.

West mountain radio, Useful electronic hobbyist products, RigBlaster and RIG Runners products, Waukesha, WI.

A family oriented Amateur Radio club in the Los Angeles area.

H.A.R.C. Radio club in in Phila. Pa. area

Dedicated to the preservation and resoration on Antique radios and radio history

An interesting article on how to make copper cactus J-Pole antennas

Located about 25 miles south of Boston, MA, near the City of Brockton.

Mission is to preserve the history and enhance the knowledge of radio.

Since 1935 serving amateur radio in Worcester MA

Mailing List for the Distribution of Dr. Tims Pirate Radio New

VE3BDB's personal page serves as a dedicated resource for members of the Radio Amateurs of Canada (RAC) residing in the Ontario South Region. Bob Cooke, VE3BDB, previously held the position of Director for this region, offering localized support and information pertinent to the RAC's activities and initiatives within Ontario South. The page likely covered regional news, events, and specific guidance for local hams, reflecting his role in facilitating communication and engagement among the amateur radio community in that area. While the page is no longer active and Bob Cooke has transitioned from his regional director role to RAC Vice President for Field Services, its original purpose was to centralize information for Ontario South hams. The content would have been tailored to address regional concerns, promote local ham radio activities, and provide updates relevant to RAC members in that specific geographic area, directing users to the main RAC website for current information.

Eastern washington amateur radio group

Ground Plane - 1/4 wave vertical, J-Pole, 3 Element Yagi Beam and simple antenna supports

This is the homepage of Kayalpattinam Ham Radio Society (VU2 KYP) - Ham Radio Society from Kayalpattinam, Tamilnadu, India

New York's Hall Of Science Amateur Radio Club.

6 Meter 1/4 Wave Antenna by Mike Fedler N6TWW. A detailed article with pictures of construction details of this 50 Mhz antenna

Cloudlog is a web-based amateur radio logging application built with PHP and MySQL, supporting station logging activities from HF to microwave. It integrates with companion tools for CAT control and automation, offering a flexible solution for managing QSO data. The application provides a self-hosted platform for amateur radio operators to maintain their logbooks, facilitating interaction with various ham radio operations. Its open-source nature allows for community contributions and customization, enhancing its utility for diverse operating preferences. Originally started by Peter, **2E0SQL**, Cloudlog was designed to enable simple interaction with the Ham Radio Deluxe logbook using MySQL.

Assisting applicants in obtaining the various FCC-issued Amateur and Commercial Radio Operator licenses.

RS41 Tracker is a software running on Windows that it is able to decode telemetries generated by Vaisala RS41 radiosondes. Used with a FM radio receiver it allows to display radiosonde positions on a map.

Repairing and restoring a Yaesu FL-2100Z amplifier

We intend for this page to tell our story as well as be a resource for other "hams"

Low signal, noise-high AC gain preamplifier

Amateur Radioastronomy in Poland

Exams, Club and Other Information, bullettins, classes and trainings

Over 130 years after its inception, Morse Code remains a fundamental skill for many amateur radio operators, enabling efficient QRP operations, DXing, and contesting. This resource provides an in-depth look at the **Koch Method** of Morse training, a widely adopted technique that emphasizes high-speed character recognition from the outset. It details how this method can significantly accelerate proficiency, moving beyond traditional, slower learning approaches. The site also delves into the rich history of amateur radio, presenting articles such as "Radio on the Rio," which chronicles local ham activity in Socorro, New Mexico. Another piece, "The Russian Woodpecker," recounts the Cold War-era efforts of hams to counter Soviet over-the-horizon radar interference on the HF bands. Furthermore, the resource explores the fascinating intersection of ham radio and radio astronomy, highlighting the direct lineage between amateur experimentation and the development of modern radio telescopes like the **Very Large Array (VLA)**. It also includes an introduction to the 6-meter band, often called "The Magic Band," detailing its unique propagation characteristics and suitability for no-code licensees seeking long-distance contacts.

Resources for amateur radio astronomers, teachers, and students.

Polish amateur radio dealer for Yaesu Icom Motorola Diamond MFJ Daiwa Lafayette

The Findlay Radio Club was incorporated as a non-profit organization in the State of Ohio on June 9, 1956.

Over 26 years of public service in Brandon FL

The California Polytechnic State University Amateur (Ham) Radio Club (CPARC) has a long tradition of communications service on campus and in the community of San Luis Obispo. The club was founded in 1947, making the Cal Poly Amateur Radio Club the second oldest club on campus

The Packet Radio beginners guide to packet radio operating by Buck Rogers K4ABT

SARA provides emergency communications for the City of Saratoga as well as for community events.

Radio Clock listens to radio time signals from your radio and corrects the time on your PC clock

Community blog at livrjournal

Website for radio Amateurs in the Hastings, Peterborough, and Northumberland Counties of East Central Ontario, Canada. Propagation information as well as antenna designs and home brew projects and Club News. Many links to Amateur Radio information

Collection of radio mods for Kenwood TS-870

A step by step approach for a ham radio vertical antenna mount using only a hole, gravel and a piece of plumbing pipe