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A modified Hairpin antenna for a wider bandwidth an mounted on a grounded metalic mast

Online variometer calculator by IN3OTD

ARI section Taranto

Located in Upstate New York, specialize in unusual surplus equipment, mostly of military origin.

Benefits of stacking two HF antennas vertically

The Amateur Radio network now known as the Caribbean Emergency and Weather Net was established in 1958 by Colonel Henry Frew, KV4BZ, for the purpose of having a general calling frequency for the Caribbean Islands and our North and South American friends.

Experimenting a low impedance feedline by G3TXQ

Navy-Marine Corps Military Auxiliary Radio System

Radio programmin equipment, radio programming cables, all sort of cables and connectors, webcams, cameras, security products

K7UAZ: The Amateur Radio Club at the University of Arizona

Use these Variac auto transformers for specific application requirements that include, but are not limited to, home coffee roasting, tube amps, and more.

A comparison of commercial 4m verticals by by Ian Hogan G6TGO

Dec 5 – 13, 2010 J6BP by Caribbean Buddies Dxpeditions.

A document describing the reparing and restoration of an old Heathkit SB-101 power amplifier

ZW5B ARRL affiliated DX Group

The current page presents a domain name for sale, rather than providing amateur radio content. It outlines the process for acquiring the _ae5x.com_ domain, including a direct purchase price of **$3,795** or a 24-month payment plan at $158.13 per month with 0% interest. The service emphasizes quick delivery, secure shopping via SSL encryption, and a 30-day money-back guarantee. Information regarding domain transfers to other registrars like GoDaddy is provided, noting that transfers can take up to 5 days and payment plan domains are ineligible until fully paid. The purchase includes only the domain name, with hosting and web design services needing to be sourced separately. Privacy protection options through NameBright.com are also mentioned.

A multi-band off centre fed dipole, designed to operate on all bands from 40m (7MHz) to 6m (50MHz). Author claims it will operate on 40, 30, 20, 17, 15, 12 and 10m without an ATU (SWR <3:1) plus 6m with an ATU.

Article that try to answer to questions that arises about losses in the ladderline, and how they change when the line is wet by g3txq

Amateur radio of clarion inc. an organization committed to emergency communications and the advancemet of amateur radio.

Indonesian Awards

Associazione Radioamatori Repubblica di San Marino

This article is about two excellent small helical antennas for the two meters band. With performance close to that of full sized antennas, these small helical antennas are low in profile but high in efficiency.

A little gadget was found in an article in QST, made with 1 pair of powerpole connectors a resistor and two leds

ARI Associazione Radioamatori Italiani Sezione di Genova IQ1GE

A comparison of Elecraft KX2 and Yaesu FT-818

The Green Valley, Arizona Amateur Radio Club

To promote and practice amateur radio and HAM radio in Mumbai, India.

How to make a custom cable to program your baofeng or kenwood radio. Includes a video on how make a Baofeng Programming Cable for Chirp on Mac OSX

This page describes a comparison study on seven different beam antennas for 40 meters band. Yagi antennas, moxon antennas, mini horse all antennas are described with schema diagram , azimuth plot and SWR F/B Gain diagram

SV1GRB's Homepage, photos from dx-peditions and useful links

Heil Sound PR-35 vs Heil Sound PR-781 vs Electro Voice Blue Cardinal by K4QKY

W3FF, N7UN, WD9CMD, N7BF, WF2S, K9CJM,AA4OC, WU1B December 2011

First italian HamFest in Florence Italy, fleamarket, dx covention and contest price giving 6th April 2013

5J0BV San Andres y Providencia June 9 - June 23, 2010 by K7BV

Complete plan for making a 2-meter J-Pole antenna. This drawing in PDF File includes a detailed list of the parts needed to assemble the Jpole antenna for 144 MHz.

The project in this article illustrates how to do this in a simple and low cost way so that you can easily access the microwave bands using the existing HF or HF/VHF transceiver as IF.

Have you been looking for an easy way to measure power or SWR at 1296 MHz? One thing is certain, it is not easy - simply because the normal range of SWR meters that most of us have is not up to 1300 MHz.

Official Site of ARI Nocera Inferiore Local Club.

San Rafael, CA ham radio club

MARCA, Inc. operates approximately 24 repeaters across Arizona mountaintops and Phoenix-area rooftops, supporting modes like D-STAR and Fusion. The club, holding the **W7MOT** callsign, engages in diverse activities including ARRL Field Day events near Forest Lakes, AZ, ARRL FMT contests, and antenna experimentation. Members actively participate in HF operations such as voice, digital, CW, DXing, and various digital HF modes, alongside MESH and EOC operations within the valley. The club's interests span a broad technical spectrum, from SDR radio building to antique radio restoration, and include modern digital modes like WSPR, WSJT, FT8, and FT4. They also explore computer-based operations such as Echolink, fostering a dedicated Single Board Computer (SBC) and Raspberry Pi group. Monthly VE testing sessions for Technician, General, and Extra Class licenses are conducted by Ray Vasquez, K4RMV. Meetings are held on the third Tuesday of each month, typically lasting two hours, with a business segment followed by a technical presentation. These gatherings occur in-person at IHop in Mesa, AZ, and concurrently via Zoom, accommodating both local members and winter visitors. Informal chat groups often form post-meeting to discuss specialized topics like D-STAR, SDR, APRS, MESH, and Fusion.

Operating ham radio in international waters

Complete microphone wiring handbook for most popular radio transceivers provided by Astatic Microphones.

IK5RUN, I5OYY I5IHE will operate from Praslin Is. Seychelles IOTA AF-024 respectly as S79UN S79YY S79LC Log Online and DX Spots Operations will start From Sunday 21st October 2012 till Sunday 4th November 2012

ARI sezione di Bologna, Italy

ARI Senigallia, Marche Italy

Calculate distance, bearing and more between Latitude/Longitude points. This page presents a variety of calculations for lati­tude/longi­tude points, with the formulas and code fragments for implementing them.

Turning an RV marine battery into a massive 12-volt emergency power source

Have you ever thought of setting up a portable HF station for an activity like the Field Day ?

IQ2VA ARI Sezione Busto Arsizio

ARI sezione Perugia IQ0PG