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A custom manual for the Yaesu FT 450 owners, tha includes system controls, factory reset procedure, procedural uses, memory management, programming and many more

Antennas are influenced by the effect of the ground and by the type of conductors from which they are constructed. Effects of various types of grounds on a 1.825 MHz horizontal 0.5 wave dipole

The Central Arizona DX Association is an ARRL-affiliated club.

Activities, legal infos, technical articles, photos, vendors, software, and links

How manage and quantify ground loss in vertically-polarized antennas by VE3VN

Homebrewing portable antennas for field day operations

A Personal Museum of Military Radios - Spy Radios - Tubes by Antonio Fucci

AudioXplorer is a sound analyzer software designed for Mac OSX, provide a real-time analysis window where you can visualize the sound spectrum and sonogram

Calculate how to set call signs

Home page della Sezione ARI di Gorizia

The Associazione Radioamatori Italiani (ARI) Bergamo section provides a local hub for amateur radio operators in the Lombardy region of Italy. This resource details upcoming events such as the annual _Panettonata di Natale_ and important administrative updates like the 2026 membership renewal process. It also highlights special operating activities, including a commemorative radio activation for the 101st anniversary of the Gleno Dam disaster, which involved operators from both the Bergamo and Vallecamonica ARI sections. The site serves as a central point for local hams to stay informed about club activities and operational opportunities. Members can find information regarding payment methods for annual dues and event schedules. The Gleno Dam activation, for instance, is a significant event, demonstrating the club's engagement in historical remembrance through amateur radio. Such activities foster community spirit and provide opportunities for members to participate in public service and special event operations, often generating **hundreds of QSOs** and promoting the hobby.

Icom IC-51A out of the Box Programming Instructions PDF file by dstarinfo.com

Ari Lecce official web site

Two different ways to create autotransformer for end fed half wave wire antennas, by using ferrite or air core.

The Hexbeam is a great little antenna! It should be high on your list of options if you want a design that can be multi-banded, exhibits useful gain and directivity, is very lightweight, has a small turning radius, and which lends itself readily to Do It Yourself construction.

ARI Macerata Official Web Site

A homemade 23 cm transverter project with several building steps and pictures

Amateur Radio on the International Space Station european web site

DXpedition by Rene/DL2JRM, Bodo/DL3OCH, Dan/DL5SE, Daniel/DL5YWM & Anett/DO6XX

Maritime Mobile Service Net for disaster help on high seas on foreign lands

Icom IC 756 Pro 3 English User Manual in a PDF file

Simple steps you can take to solve most problems caused by station equipment

A family of wire beams by G3TXQ

This Microphone comparison article summarizes the test results of two popular ham radio microphones the ElectroVoice RE27 and Heil PR781

The Ontario Science Centre Amateur Radio Club (OSCARC) provides volunteer support to the Amateur Radio (ham radio) demonstration station at the Ontario Science Centre in Toronto, Canada.

A vertically-polarised VK2ABQ Antenna for six meter band

Associazione Radioamatori Italiani Sezione di Trieste

Constructing a dip oscillator provides radio amateurs with a fundamental piece of test equipment for resonant circuit analysis. This particular design, adapted by VK3YE from a concept by _Drew Diamond VK3XU_, details a practical build using readily available components. The unit incorporates four plug-in coils, covering a frequency range from **2.6 MHz to 55 MHz**, mounted on 5-pin DIN plugs for versatility. A salvaged two-gang air dielectric variable capacitor, fitted with a vernier reduction drive, serves as the tuning mechanism, with the smaller gang optimizing bandspread at higher frequencies. In practical application, the dip oscillator is used by setting the meter needle to approximately two-thirds scale. When the instrument's coil is brought near a tuned circuit under test, a noticeable dip in the meter reading indicates resonance. This allows for precise measurement of resonant frequencies in antennas, filters, and other RF circuitry, proving invaluable for homebrewing and troubleshooting. The design emphasizes short wire runs for stable operation, particularly at the higher end of its operational range.

The official web site for the santa clarita amateur radio club.

How to home made antenna traps with material you can easily find, and how to properly tune it.

Tuning HF Coaxial Antenna Traps

English operating manual of the Yaesu FT-2800M transceiver

23cm 1296 MHz Field Day Yagi Construction, a 26 element conventional-style design. Article with several pictures and detailed homebrewing instructions

Jose B Rivera, N2LRB, shares his initial experiences with the Icom IC-7300, recounting a shift from skepticism to appreciation for the transceiver. He details how the radio's impressive Sherwood Engineering test results, ranking it #12, significantly influenced his decision, especially considering its competitive price point against higher-end options like the Elecraft K3s. The review highlights the IC-7300's strong receive capabilities, a key factor in N2LRB's purchasing decision, and notes the advantages of its SDR architecture for future updates. He describes the straightforward setup process, from unboxing and connecting PowerPole connectors to making a first contact with N0HQ, a special event station. N2LRB expresses satisfaction with the radio's clear audio and ease of tuning, even if the pan-adapter's utility for his operating style remains to be fully explored. He concludes that the IC-7300 offers exceptional value, providing SDR features and receive performance comparable to more expensive rigs at half the cost.

BaoFeng UV-5RA, UV-B5, UV-82, and Yaesu VX-6R Comparison

Arizona contest club for big guns, little pistols and cap guns, from experienced to new contesters.

Comparing many antennas for 50 MHz band

The Caribbean Contesting Consortium is a contest club dedicated to fun, international friendship, and advancement of the contesting art through superior operating technique and maximum application of technology.

A low cost, low power microwave transverter so that you can operate easily on 70cm band even with a HF or VHF transceiver

Read more about the purpose, policies, and procedures of The National Traffic System in this 48 pages PDF File

Roach pole vertical antenna for 40 and 30 meters band featuring good performance on short skips contacts compared to wire dipole

This article is about a home made project of a whip antenna for 2 meters band. Includes lenght of whip for all frequencies from 140 MHz to 151 MHz both in mm and inches

Relevance of a proper ground systems on short HF vertical antennas, with an analysis on a vertical antenna for 160 meter band

The Icom IC-7600 compared to other Icom HF radios , like IC-756Pro III, IC-7700 and IC-7800 by VA7OJ/AB4OJ

This article describes a series of experiments to understand better how typical UnUns perform

The Northern Arizona DX Association exists to help hams enjoy the fun of radio contests and DXing.

Supporting wire antennas with squid poles

Official site of ARI Comitato Regionale Friuli Venezia Giulia

A blog site dedicated to SSTV Slow Scan Television images transmitted from the International Space Station