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Construction and analysis of a low cost omnidirectional horizontally polarized antenna for 144 MHz, including notes on halo antenna stacking

Ultimate VHF/UHF DX resource site

DMR-MARC Networked Repeaters map

EchoMac is a program for MacOS X users that permit access to the Echolink system

10,141.8 MHz from JN55VF

Reduces line noise on TS-850

This Duoband-Yagi has a boom of 3.60 m and 3 elements for 10 m 4 elements for 6 m and one feedpoint with 50 Ohm

A simple low-power broadcast-type circuit, using a crystal oscillator integrated circuit and an a collector modulated AM oscillator

Discussion on W3EDP Antenna and grounding

N6GN's higher speed packet page for amateur radio digital networks

A 10 elements quagi antenna for the 900 MHz band

This is a simple portable 2-meter J-Pole antenna. You start with a piece of 450-Ohm Ladder Line

Demonstrates the _SQUIRL Field Day Logger_, a specialized software tool designed for efficient contact logging during the annual ARRL Field Day event. The resource details its core functionality, which includes real-time logging to easily readable text files, with filenames structured by callsign, band, and mode (e.g., K8DAA-20M-SSB.txt). It highlights features such as a real-time history grid of previous contacts, a dynamic USA and Canada map displaying contact locations, and a duplicate checker that provides audio notifications and pre-fills class/section data for previously worked stations. The software also includes an ADIF export function, enabling users to transfer logs to other general-purpose logging programs. The software's design emphasizes simplicity and ease of use, allowing for rapid on-the-spot training, as noted by users like W4CMB. It supports various operating systems, including Windows 98 through 8, and has been successfully run on Linux via _Wine_. Key usability enhancements include a "double-size" feature for improved readability and a "Space Mode" for quick field navigation. The version history indicates continuous development from 2001 to 2013, with significant additions like the real-time Field Day Map in 2003 and ADIF export in 2004, which allows for seamless integration with other logging platforms.

Online is a VT100/ANSI terminal emulator and Telnet client for Palm OS organizers. Connect to Unix systems, configure routers and reprogram embedded computers.

County Hunting is one of many amateur radio activities. There are over a thousand hams who have worked all of the US counties. Some have done it several times

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

A lightweight portable vertical antenna for 40m

Allows you to automaticaly upload ARGO screen captures to your webpage in a convenient way. by ON7YD

This electronic board will be installed over a Raspberry Pi CPU card to provide a repeater controler. All features are software controlled with the famous SVXLINK and other interessed modules.

VHF, ms, aurora, es, photos, audio, link, soft and more.

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

The Smith Chart program with its extensive Help files. Written in Visual C++ ver 1.5, it runs in Windows 3.1 and later by w9dmk

An online javascript calculator for cubical quad antennas, simply input the resonating frequency to calculcate up to a five element quad antenna. This quad antenna calculator let you determine the total length of each element and spacing among elements.

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

Dedicated to 50MHz and 144MHz. Online 2m and 6m logs. Real Audio sound clips of Tropo, Aurora, Sporadic E, Meteor Scatter, TEP and F2 Propagation.

Pictures and description for a perfect soldering.A tutorial on soldering technique includes videos.

Icom Australian web site

This free program calculates the location of any locator. It calaculates the distance, azimuth, longitude and latitude between two Maidenhead locators. Converts longitude/latitude coordinates to Maidenhead locator Converts Maidenhead locator to longitude/latitude coordinates

Mounting a whip on the trailer hitch

Here is a well documented plan of a 20m-10m compact magnetic loop antenna. Article includes lots of pictures and technical details published by KP4MD

JL is a free contest logger written entirely in Java. Run under Windows, Linux, Solaris, and MacOS X by W1JQ

conversion of low band VHF AWA RT-85 transceiver down to 6 metres.

The purpose of this web page is to try to investigate some of the issues around ICOM IC-746PRO reported by many radio amateurs through out the world; and unfortunately not properly taken care of by ICOM.

PVRA Repeater Club has repeaters throughout Connecticut.

Radio scanning resource site for scanning enthusiasts in the new jersey and new york area.

This article contains notes on installation of a Roger Beep for an Icom IC7000 transceiver for use with a Heilsound Traveller headset.

A homemade 10 element Yagi Beam Antenna for 50 Mhz by Rod Mackintosh, a NBS Yagi on a 13.2 metre boom.

A selection of alphabets used, particularly by ham radio operators, to spell out words

An open collaborated project for creating base libraries and applications to allow the passing of information from the host computer to the D-STAR radio and vice versa.

Manufacturer & distributor of Vacuum tubes and vacuum capacitors.

80-meter peilontvanger / receiver includes printed circuit sample and list of components

Microwave general web site by G3PHO

Adventure Radio, articles and reviews. This site has a whole host of ham related information.

Pegasus RX-320 and other N4PY software for tentec radios

DL7JV Christian report his direct experience on magnetic antennas

KyteLabs InfoBase - Electron Tubes & Valves Data

List of european IOTA Prefixes

The KP3AV Systems website offers a detailed listing of amateur radio repeaters across Puerto Rico, including operational frequencies and tones for VHF and UHF bands. It features sections dedicated to digital modes like DMR and C4FM, as well as information on FRS, GMRS, and MURS. The resource also includes articles on emergency communications protocols and provides access to Spanish-language manuals for various radio equipment. Recent content covers the new open-source FT2 mode for WSJT-X Improved, upcoming 60-meter band frequency allocations and power restrictions effective February 13, 2026, and discussions on 2-meter contacts with Desecheo Island from Puerto Rico. The site also presents U.S. amateur radio band plans and highlights local contesters like Manuel WP4TZ, offering practical insights into portable operations and contest participation.

A Free Prefix, DXCC and Locator program for Windows

If you need a cheap and easy to construct Subtone Generator for EU-model VHF-UHF rig, here is a solution that works very well.