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Modifications for motorola and ericsson radio repeater

Explore this high-resolution ITU Zones Map, a critical reference resource for amateur radio operators, international broadcasters, and telecommunications engineers. Originally established by the International Telecommunication Union – Radiocommunication Sector (ITU-R) Broadcasting Services Division (1999), this chart accurately divides the globe into 90 specific CIRAF zones. This authoritative visual guide is indispensable for planning High Frequency (HF) radio propagation, scheduling international broadcasts, and verifying locations for radio contests and awards. Distinct from the 40 CQ Zones, the ITU zoning system provides the official administrative framework used for global frequency management. This digitally enhanced version ensures maximum clarity of zone boundaries and numbering (e.g., Zone 28 for Central Europe), making it an essential tool for technical accuracy in logbooks and station management. It serves as a trustworthy standard for educators, hobbyists, and industry professionals alike.

Homepage of Hong Kong's elite group of DX'ers

Protecting the ham radio stations, using a good ground system

Amateur radio shop in Barcelona Spain

Ham radio blog dedicated to military radio equipment by EA3FOW

An overview of some of the ways, and the key tips on how electronics soldered joints can be unsoldered or desoldered.

Classic Radio Restorations specialize in professional repair and restoration on all makes and models of antique radios and vintage phonographs. Since 1978.

Links and sources of information about our club in Ventura County, California

The RoadTrek design presents some unique challenges to us hams. Here an example of a VHF and HF antenna installation on a VAN

Demonstrates the construction of a custom programming cable for Yaesu VX-7R and VX-5R handheld transceivers, enabling computer interfacing for memory management and frequency coverage adjustments. The resource details a six-transistor circuit design, powered by the computer's RS232 interface, utilizing readily available and inexpensive discrete components. It includes a complete bill of materials, specifying transistors like the _2N2222_ and _2N3906_, diodes, and resistors, along with a matrix board layout for compact assembly within a 75x50x25mm enclosure. The guide provides practical tips for working with matrix board, such as scoring and snapping, track cleaning, and component soldering order. It outlines the specific connection requirements for both the VX-7R (via Yaesu's CT-91 breakout lead with a 2.5mm stereo jack) and the VX-5R (via CT-44 or a four-section jack), detailing signal and ground pinouts. The author successfully tested three circuits, documenting the one with complete two-way communication, allowing users to program their rigs with software like _VX-7 Commander_ and achieve capabilities beyond commercial cables, including band adjustments.

The santa cruz county amateur radio club. activities, the newsletter short skip, events, links and other happenings about amateur radio.

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

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

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

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.

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

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

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

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

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

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.

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

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

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

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

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

W0CUO Grand Island Amatuer Radio Society. Grand Island Nebraska.

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

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

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

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.

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

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

Since 1935 serving amateur radio in Worcester MA

Eastern washington amateur radio group

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.

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

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

New York's Hall Of Science Amateur Radio Club.

Low signal, noise-high AC gain preamplifier

Repairing and restoring a Yaesu FL-2100Z amplifier

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

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

Amateur Radioastronomy in Poland

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

Resources for amateur radio astronomers, teachers, and students.