grid square map

2 meter square dipole - Homebrew a 2 meter square dipole antenna

40 m NVIS Square Loop antenna - A NVIS square loop antenna with a parasitic reflector for 40 meter band by NA4L

Low-noise receiving antenna for 80 and 160 m - How you can make a low-cost, low-noise, 21-foot-square receiving antenna that boost your DX ability.

80 m four square vertical - NA4L wire four square vertical array for 80 meter band

Qsorder - Contest audio recording for N1MM. external "plug-in" which adds a QSO audio recording function.

N1KXR/B - Ten-Meter Propagation Beacon - N1KXR/B went on the air at 21:00 Hours EST on Saturday, November 22, 2008 and has been in continual operation. Located in Northampton, Massachusetts [USA] (grid square: FN32), it transmits 24/7/365 and is coordinated with the IARU Region 2 HF Beacon Coordinator.

DXMaps.com - DX Cluster spots mapped in real time for all bands.

HA8TKS VHF DXCluster - VHF and Up DX-cluster with map mash-up includes list, HAM tools, QRB calculator by HA8TKS

ClubLog DXCC Mappings - Explains some of the DXCC mapping decisions made by Club Log,

HA8TKS Tibor Priority listing - HA8TKS website dedicated to amateur radio VHF DXing include a dx-cluster map & list, HAM tools, QRB calculator and personal statistics

RFinder Worldwide Repeater Directory - The only worldwide amateur radio repeater directory. Supports Android, iPhone, web, RT Systems, CHIRP GPS enabled. AvMap, Garmin, TomTom

Refractive Index maps for Europe - Refractive Index maps forecast for Europe

Winlocator - Winlocator 8 for calculate QTH Locator with map. Data base with Country, Capital, Ham prefix etc In French

Xastir - Xastir MacOSX APRS software for receiving and plotting APRS(tm) position packets. Xastir supports many map formats and is highly customizable

A DIY Square Wave Signal Generator - This circuit is very simple and has a fantastic range of potential uses.