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Presents a Brazilian online portal dedicated to **amateur radio**, **CB radio**, and shortwave listening (SWL) communities. The platform facilitates free classified advertisements for radio equipment, including HF, VHF, and UHF transceivers, antennas, and accessories. It also aggregates a substantial collection of technical articles from Brazilian amateur radio operators (e.g., PY2DJW, PY1LJ, PY1LL/4LC), covering topics such as CW training with RufzXP, balun importance, and radio wave characteristics. Furthermore, the resource provides extensive links to Brazilian ham radio sites, clubs, international organizations, and official ANATEL (Brazilian National Telecommunications Agency) documents regarding licensing, equipment homologation, and regulations. The portal features sections for user evaluations of transactions, a "Top Ten" list of most visited pages, and a calendar of past and upcoming ham radio events across Brazil, including "Feirinhas" (local swap meets) and "Encontros de Radioamadores" (hamfests). It also includes a directory of ham radio related businesses and services in Brazil, such as antenna manufacturers (Diex), QSL card printers (Arte Final), and repair technicians (PY2MOK). The site also offers propagation maps, DX cluster links (e.g., DX-SUMMIT), and satellite tracking tools, making it a central hub for Brazilian radio amateurs seeking to buy, sell, learn, or connect with the community.

Modifications for motorola and ericsson radio repeater

KARSFEST, held at the Will County Fairgrounds. Sponsored by the Kankakee Area Radio Society. Large and well attended hamfest and computer show!

Examines the Icom IC-2100H 2-meter mobile transceiver, detailing its operational characteristics and user experience. The review highlights the clear, easy-to-read display with internal labels, the button-filled microphone's functionality, and the rig's physical construction, including its weighty heat-sink and lack of a cooling fan. It also discusses memory programming, the unique amber-to-green backlight color options, and the radio's performance against _intermodulation_ in urban environments, noting it performs "pretty darn good" compared to other rigs. The analysis delves into a significant low-voltage cutoff problem, where the microphone ceases to function below approximately **12.6 VDC**, rendering the radio receive-only or causing it to stick in transmit. The author describes testing the voltage cutoff, observing it fluctuate from _12.38 VDC_ to 12.69 VDC. An update from Icom involved a "factory update" to the CPU's control code, which is strongly recommended for early-serial number units to prevent operational failure in low-power emergency scenarios.

HAM-IV antenna rotor repari and restore

Activating a county for ham radio can be dangerous to your health!

Radio Amateurs of Ankara, Turkey. English, Turkish, homepages of HAM's.

Personal review of the Yaesu VX-6R handheld transceiver

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.

"W2IK's Personal experience being the first responder at ""ground zero"" during the WTC 9/11 disaster."

This article contains the measurements for building a full wave loop using wire and length of 1/4 Wave Coax Matching Transformer

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

SS232K - The simple and safe RS232 interface for Kenwood radios

Discussion on W3EDP Antenna and grounding

There's no longer any need to invent new swear words

A small antenna tuner for 14 MHz

Testing SWR on your antenna and getting the best performance from your investment by L.D. Blake, VE3VDC

Nifty! Quick Reference Guides and short form Mini-manuals and for Kenwood, Icom, Yaesu and Elecraft transceivers.

Cartoonist will illustrate your concepts for use on QSL cards and more by cartoonist Dan Rosandich

Schematic for AR-8000 programming cable

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

A cooperative venture between MSUARC and Calloway County Fire and Rescue

EXTFSK.DLL is an MMTTY extension that interfaces MMTTY to a user-made hardware device via serial port, parallel port or USB

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

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

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

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

K4JRG GAP titan dx specifications

Eham FT-1000MP review

A 144 Mhz Slim Jim Antenna, aluminum tubing version project by Mohammad 9W2WTF

What little I know about ham ballooning by Dave Mullenix, N9LTD

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

Ham radio manuals in italian and english for several makers and products

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.

Alan Applegate (K0BG) article on mobile oprtations

Oklahoma's Largest Amateur Radio Hamfest

EggsHam is a PalmOS application that generates (and grades) _practice_ amateur radio licensing exams. It is for people interested in obtaining an amateur radio license in the US, who want to practice for the Technician, General, or Extra written exam.

The safe RS232 CAT interface and PA buffer for Elecraft K2

Firsts pictures of Icom IC-9100 taken at Tokyo HamFair 2009

Hams with web cams database with net and roundtable information.

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

Demonstrates various practical amateur radio projects and technical discussions through video episodes. One episode details cutting and retuning a _1/4 wave shorted stub_ from 101.7 MHz to 107.5 MHz to safeguard a transmitter's driver stage, alongside insights into advanced _160-meter antenna systems_ like eight-circle arrays and beverage antennas. Another segment covers upgrading firmware on an _ATS-20+_ receiver using AverDudes for improved display and functionality, and a detailed guide on using D-Star DR mode on an _ICOM ID-52A_ for international repeater programming. Additional content includes a deep dive into _OpenHamClock_ as a potential replacement for the HamClock project, updates on _Raspberry Pi 5_ running Trixie OS, and a review of the Choyong LC90 Internet radio with AI integration. The series also features "Ham College" episodes, which meticulously prepare viewers for the Technician Exam by covering topics such as antenna and transmission line measurements, SWR interpretation, and the functions of basic electronic components like rectifiers, relays, and transistors. Practical advice on coaxial cable characteristics, dummy loads, and proper soldering techniques is also provided.

CARA is dedicated to furthering the hobby of amateur radio in and around the city of Calgary, Alberta, Canada.

Heathkit SB-220 Amplifier modification by KE5YA

Cayman Amateur Radio Society

List of instruction manuals for hamtronics products

The collinear J-Pole, often known as the Super-J, does improve the behavior over a regular J-Pole. As many attest, there is an advantage when vertically combining 1/2 radiating sections to have a bit of separation between the half-wave end points. The Super-J has very little separation between the two half-wave radiators.

This page describes a cheap, weather-resistant and readily available type of antenna wire by HAMwaves.com