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A brief review of the IC-2100 mobile 2m transceiver

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

Personal review of the Yaesu VX-6R handheld transceiver

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

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.

SS232K - The simple and safe RS232 interface for Kenwood radios

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

A small antenna tuner for 14 MHz

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

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.

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

Discussion on W3EDP Antenna and grounding

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

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

Fellowship of Christian Amateurs meeting M-F on 40 meters

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

This scheme can be used to combine two antennas

W0CUO Grand Island Amatuer Radio Society. Grand Island Nebraska.

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

Eham FT-1000MP review

K4JRG GAP titan dx specifications

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

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

Alan Applegate (K0BG) article on mobile oprtations

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.

Oklahoma's Largest Amateur Radio Hamfest

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

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

The safe RS232 CAT interface and PA buffer for Elecraft K2

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

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

Cayman Amateur Radio Society

The online review site that learns what questions that you need to focus on most. Focusing on amateur (ham) radio exams

Protecting amateur radio equipment from transient overvoltages requires robust lightning and surge protection, which is the focus of Electronic Specialty Products. The company provides various devices, including coaxial lightning arrestors for antenna feedlines and surge protectors for AC power lines and data circuits. These devices are engineered to divert high-energy surges, such as those caused by direct or indirect lightning strikes, away from sensitive transceivers, amplifiers, and computer components, thereby preventing catastrophic damage. Key products include the _Coaxial Lightning Protector_ series, designed for various impedance levels and frequency ranges up to 3 GHz, and the _AC Line Surge Protector_ for shack power distribution. Effective deployment of these protection devices can significantly reduce the risk of equipment failure and ensure operational continuity during severe weather. For instance, a properly installed coaxial arrestor can handle peak currents of **20 kA**, while AC line protectors offer clamping voltages typically below 400V. Comparing different models reveals varying levels of insertion loss and return loss, with some coaxial units exhibiting less than 0.1 dB loss at 500 MHz, making them suitable for high-performance HF and VHF/UHF operations. Integrating these components into a comprehensive grounding system is crucial for achieving maximum protection against both common-mode and differential-mode surges.

Reviews Summary for Solarcon A-99

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.

Amateur Radio Webring started in July 1997

An indeal stealth antenna made by multiple quarter wave verticals, supported by a tree.