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The G4ZU Spider Beam or Skypper - This 3 elements wire Yagi comes along in a great variety of names. On the 11 meter is calle Skypper due to the manufacturer Alex 1SD019 On Ham bands is called Spider beam or G4ZU.

Build a Basic Beverage Antenna - Basically the Beverage is a travelling wave antenna made of a length of wire a small height (relative to the wavelength of interest) above earth. It can be terminated for unidirectional reception or left unterminated for bi-directional reception.

HamLin Tower Project 2003 - A cooperative venture between MSUARC and Calloway County Fire and Rescue

10 m Aerial Matching Unit - This simple matching unit will allow a 10 meters aerial to be used right across the 10m band without the need to physically adjust the elements, and offers a virtual 1:1 VSWR at 50 ohms impedance to the transmitter.

VHF/UHF Folded Diplole - This is a two element colinear design for vertically polarized radiation. It may be constructed for use on either 2m or 70cm

ZS South African Call book - Use this search engine to look up call signs for South Africa (ZR, ZS and ZU), and members of the SARL who hold foreign call signs

Shortest Vanity Callsigns  ^updated - This is a service for finding the shortest available vanity callsign in your amateur radio class. It filter through all possible callsigns and provide just the unused ones weighted by their length in morse code or their actual number of letters.

ZL Awards - New Zealand, the information has been taken from the New Zealand Call Book, published annually by NZART

GM3VLB Opertating Scottish Islands - offering informal information on Amateur Radio operation from Scottish Islands specifically the SCOTIA, IOTA, WAB, WLH and CIsA programmes - and other schemes involving Scottish Islands

Associazione Radioamatoriale Sardinia QRP Club - First QRP Club in Sardinia Island (IS-QRP). Special Callsign IQ0QP

K6SIS Siskiyou County Amateur Radio Association (SCARA) - Home page of the Siskiyou County Amateur Radio Association located in northern California; Club Call Sign is K6SIS.

Radio QTH practice exams - Call sign lookup system based on FCC database allow lookup for vanity call signs, practice exams and simple online qsl card creation

Luksa Industries - Luksa industries design and manufacture mechanically operated aluminum telescoping masts and telescoping tripods to support communications and military antennas

ARRL US Call district map - Map of USA call districts by ARRL and edited by AA70A

Google Maps APRS Priority listing - APRS web map with weather, telemetry, messaging and a bulletin board. Google Maps and Google Earth views update automatically in real time. 14 languages.

D-STAR Callsign Calculator - This is a user-friendly web page based D-STAR call sign calculator that requires no installation or configuration to use.

D-Star Call Calculator - Calculate how to set call signs

Working AO-51 Calls for Courtesy, Common Sense - AO-51 Operating guidelines and introduction

Beaconmap - Beaconmap is a Win95/98/NT program to help listeners to identify the beacon stations of the NCDXF/IARU beacon network. The program displays a flashing dot at the location of the beacon that is currently transmitting. The call sign of the beacon, as well as the QTH is shown in the status bar. By PA1ARE

Super Check Partial Database Files - Databases of contesters call-sign to be used with logging software The dta files can be used with CT, WriteLog, TRlog, SD, N1MM Logger, NA, Win-Test, and others

Master.dta Editor - Freeware windows program by WE3NEA that allow to view and edit the Master Callsign Database file used in many contesting programs, import and export callsigns, auto-download announced DX operations.

Filtroid - Filtroid is an extremely easy-to-use program for synthesizing microwave filters. It can be used to design practically all filter types from audio to microwave frequencies as well as amplitude and delay equalizers and attenuators.

CTR-Remote - CTR-Remote is an enhanced version of CTR817 (a Pocket PC radio control program for the Yaesu FT-817). The program has been completely re-written using Microsoft Visual Studio .NET and now supports a wider range of radios, Bluetooth® wireless technology and/or TCP/IP and Wi-Fi radio control, ADIF log import and export format, custom frequency lists, DX Cluster monitoring, callsign lookup, and enhanced scanning options.

WinRad - Winrad is a software program designed to implement a so-called Software Defined Radio (SDR), meant to run under Windows XP, Windows 2000, or Windows 98SE

iLocator for iPhone - A small application for Apple iPhone that calculate grid locator from gps, wifi or gsm cells by IW2BSQ