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Building a Lindenblad Antenna for 137MHz

Ham Radio Contest Maps - US Contesters maps generated based on ARRL online score data by WM5R

VHF UHF European Beacons - MMMonVHF maintains the data for 6m, 2m, 70cm and 23cm bands in collaboration to LA0BY. This site allow display of a beacon map and latest beacon spots.

N9YDZ Beacon - N9ydz beacon brighton, illinois, grid square em48 on 28.210 Mhz

LU9DA DX Cluster maps - Display maps of current dx spots per each band

Irish Lighthouses - lighthouses and lightships of ireland and northern ireland with arlhs reference numbers for all irish lights

KC7KEY Maple Valley Amateur Radio Club - The Maple Valley Amateur Radio Club (MVARC), an ARRL Affiliate club, is a group of amateur radio enthusiasts in the greater Maple Valley area who meet and engage in activities to further the advancement of this hobby for the good of ourselves and the community.

DMsolar - Solar Panels, Grid Tie Systems, Solar Power Kits, Solar Cells and more. DMsolar carries solar energy products for your needs.

Convert addresses to Latitude and Longitude - This online tool will convert any street address into latitude and longitude and vice-versa by executing queries to several online mapping services like googlemap geocoder maporama terraserver and more by Stephen P. Morse

WorkedGrids - WorkedGrids is a Windows application that displays a map showing the amateur radio grid squares contacted and logged in using a third-party logging program. WorkedGrids uses colors to display information on a per-band basis. Up to four bands can be displayed concurrently by VE2ZAZ Bert

QTH locator or Map square with Google Maps - Based on Google Maps displays corresponding QTH grid square or helps to find one by pointing on the map.

Demis Web Map Server - A good online map service useful for ACARS map generation

Radio Amateur Maps - Collection of world wide radio amateur maps by SP8DA

Create APRS maps on the fly - PHP script to use expedia maps for APRS pages by ON2BPP

Google and APRS - N6BG site using google maps api to show APRS data

Amateur Radio Repeaters Maps - Amateur Ham Radio Repeater in Google Maps. View by state or specific location.

OHIO 2 meter repeater map - prepared by KB8SSH since 2002

NVIS Propagation maps - Maps and propagation indices

Live Shortwave Radio Schedule - Dynamically generated shortwave radio schedule and world map. Updated hourly. Easy to read and use.

USAPhotoMaps - Free Windows APRS Client with capability of downloading free aerial photo and topo map data.

DXFile - Windows shareware logging program, offer several features like packet radio interface, web cluster, grid square, beaming directions, qsl manager lookup, dx spot filtering by F6GQK in french.

FA Palm - Grid Square - Grid Square for Palm OS calculates the Maidenhead Grid Square for a given latitude and longitude.

BeamFinder - BeamFinder is a software tool designed to conduct analyses for radio amateurs interested in radio propagation studies. It provides a large 2500 x 1800 pixel screen map of the world which displays calculated results from sophisticated models, dx data and other sources of information

CallBook for iPhone - CallBook is an Amateur Radio application that allows you to look up call signs via the free WM7D server, the QRZ Online subscription service or the HamCall subscription server and track active APRS stations on www.aprs.fi. Lookup results can be emailed and the QTH can be instantly viewed in the Maps application

Power Gride Tubes - Article on tubes and their usage in power amplifiers design. Explain failures of tube in RF power amplifiers, a common problem in the SB-220 SB-221, TL-922 and other amplifiers.