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The National Digital Link Cisar CisarNet Project

Smith Chart it is a graphic tool for solving transmission lines problems

A close up of Doppler Shift, a phenomenon which is commonly observed by the lay person, yet still confuses many amateur satellite operators.

A calibration kit useful when you need known reference impedances to properly calibrate your vector network analyzers.

Botswana October November 2010 DX Pedition

Martin Ewing, AA6E

Amateur radio and family related site. Good ham links. Great pictures of antique amateur radio and military gear.

Radio Amateur Society of Thailand

Reivews of the Icom IC 7100 HF VHF UHF transceiver

Some basic tips for successful QSLing, in particular when utilizing the services of a QSL Manager by W5UE

A review of the MFJ-259B Antenna Analyser writtten by G3CWI

This project is a full wavelength, horizontal, loop antenna for the 40 metre Amateur Radio band, built using insulated copper wire in a diamond shape, supported by egg insulators, tethered to 4 masts, each 6.5m high

A simple slim jim antenna for 433 MHz. Simple drawings and pictures of a simple Slim Jim antenna.

Northern Neck Contest Club

The Laurel Highlands VHF Society, Inc. owns and operates the Acme repeater, located on the Chestnut Ridge in southwestern Pennsylvania.

Coordinates amateur radio repeater systems, control and link frequencies

Replica of David Sarnoff\'s Key, Marconi operator at Station WHI

The Sullivan County Emergency Services Amateur Radio Association headquarters is located in the Sullivan County Courthouse Laporte, PA.

Serving the Copper Country in Michigan's Western Upper Peninsula. Copper Country communities include Calumet, Copper Harbor, Lake Linden, Houghton, Ontonagon, Baraga, and other nearby towns.

New Zealand Women Amateur Radio Operators, to promote and encourage interest in amateur radio amongst women.

Map of locators of Brasil

The brockville amateur radio club is located in the heart of the 1000 islands on the banks of the st. lawrence river.

The Clinton County Amateur Radio Association - Club Call W8GO

RZ9MYL - the most active YL-clubstation in the world

A Fox transmitter by VE2EMM with construction details part list and schematic diagram

The Triple H Net Association Net

The Licking County Contest Group (LCCG) is a small group of Radio Amateurs in Licking County Ohio who enjoy contesting.

This freeware application for Linux and windows, allows you to convert an ADIF file to a KML file so you can map your QSOs easily and open it with google maps, or google earth or any application supporting the KML format

Plymouth Historical Museum radio station

Radio Club de Costa Rica

A project by Don Wilhelm W3FPR

Baofeng UV-B5 LCD background light is turned on only when some keys are pressed and stays on far a very short time. This article explains how to use flash switch which is used in UV-B6 version but in UV-B5 has no function.

Home discussion group for NIAN

Amateur Packet Reporting System (APRS) operations often require compact, reliable solutions for transmitting position data, particularly for mobile or portable stations. This resource details the construction of the _Tiny Track-I_, a transmit-only APRS tracker designed for straightforward integration with a VHF radio and a Global Positioning System (GPS) receiver. It enables hams to broadcast their location without the complexity of a full-duplex TNC. The project outlines the printed circuit board (PCB) layout and schematic, based on an original design by N6BG, with a personal PCB drawing by SV1BSX. It includes specific component placement and notes an additional 10uF/10V capacitor (C5) for improved IC voltage decoupling, a modification not present in the original N6BG diagram. The unit connects to a computer or GPS via a DB9 female connector. This tracker is ideal for basic position reporting, offering a simple and effective way to participate in APRS networks. Its small footprint makes it suitable for vehicle installations or field deployments where space is limited, providing a **reliable 9600 baud** data stream for location updates.

There are quite a few variants of the design accompanied with many opinions on the effectiveness of the antenna. This page features links to some similar projects and a homebrewed personalized version of this portable antenna tuner

Personal Page UR4IOR from Ukraine, with some nice personal photos.

Ham radio club in west Los Angeles

An interesting review of the Icom 2720H VHF UHF amateur radio mobile transceiver with pros and cons

List of countries that have been worked from the Czech Republic on 50 MHz band since January 1, 1993

Description of an HF beacon keyer with telemetry. What makes the keyer rather different is its versatility - it is a multi-mode unit, with ASK and FSK modulation, sending Feld-Hell and Morse on command

Hamradio, Webcams, Radio and TV-Links by DF3SP Walter

Inventor of the Beverage antenna

OH7UG QSO blog from Finland

A page with several testing and measurement resources usefull for those ham radio operators who needs to align or repair their own radio equipment.

This software loads WPX type ADIF files with the <PFX:xxx> tag and calculates the different callsign prefixes. The software will load and capture the totals for big files. ADIF files must have the .adi file extension.

Big Rapids is located in central Michigan and is home to about 11,000. Big Rapids is also home to Ferris State University and the Big Rapids Area Amateur Radio Club