grid square map

40M Twin Half-Square Array - 40 meters elevated vertical antenna array at VA7ST

The 4-Square Site - 4 Square Vertical Array website dedicated to vertical arrays antenna installations worldwide by G4ATA

4 SQ antennas with 90 degree couplers - 80 meters 4 Square antennas at 5A7A

The IOio Antenna  ^updated - The IOio antenna and the satellites, a custom portable antenna done with squares both UHF and VHF by EA4CYQ

Curtain Antennas - Lazy H Antenna, Bi-Square, Sterba Curtain, HR, HRS, and USIA Curtain Antenna Arrays at W8JI

Map of US 10 m beacons - Map of US states beacons oprating in 10 meters band

North American Beacons Map - North american 50 Mhz beacon map by K9MU

RadioCQ.com DX WebCluster - RadioCQ DX WebCluster mainly in spanish offer a graphical web cluster with flags, band selector, locator using google maps, chat and forum.

K2JJI Tryon Amateur Radio Club - Listen to the K2JJI repeater (146.70- PL 100.00 Hz) located on Fulton Co. NY. Coverage of grids near and around FN23/FN22.

GB Antennas and Towers - Dutch Antenna and Tower Manufacturers from Slimline Square Triangular Round Towers. Antennas production include Yagi Monoband/Dipole/HF Quad /50MHz and 70MHz Yagi-Quad, VHF-UHF yagi-Quad and Comby antennas VHF/UHF/SHF

NS6T's Azimuthal Map - This site provides free azimuthal maps for almost anywhere on the globe. Create your own azimuthal map for your location. You can customize the map in a variety of ways by changing the options in the web form

Online QTH locator or map square - Find either your or your correspondent's Maidenhead grid square or location using Google Maps

ITU Map - Official ITU-R zone map at ITU Broadcasting services division

CQ Zones WW Map - Large - A large CQ Zones WW Map, in a 3111x2251 Pixel format suitable for printing pourposes

Ham Radio Grid Square Locator Map - Amateur Radio Ham Radio Maidenhead Grid Square Locator Map, by Address, Call sign or Grid Square, using google maps

California Maps - APRS Central California maps. Here are the APRS maps you should have.

Digital Modes Frequencies - Digital Communications Modes and Frequencies

VHF Propagation Maps - Experimental maps that show real-time VHF propagation derived from analyzing data gathered from the APRS-IS network.

Arizona Repeaters Directory  ^updated - Arizona repeaters sorted by counties, with location maps! Also includes Robet's List of verified Arizona scanner frequencies.

Radio Works - RadioWORKS is a tool for calculating various items related to radio waves and radio wave propagation. Get detailed information about a frequency, such as the free-space wavelength, band classification, propagation methods, common transmitter configurations, etc. Calculate antenna lengths or frequencies. View a 3D coverage map by providing a latitude / longitude coordinate and transmitter height.

GridLocW - GridLocW a Lat/Long to Maidenhead converter for Windows with optional GPS support

Ham Fax - HamFax is an application for sending and receiving facsimiles in amateur radio and for receiving public facsimile broadcasts like weather maps. Supported interfaces are sound cards and the SCS-PTCII from Special Communication Systems.

GcmWin for Linux - Great Circle Map for Linux, available for Debian, freeware by SM3GSJ

VOAProp - VOAProp shows you typical propagation for a given hour of the day during a given month. The propagation is shown as expected signal strengths to be received from different parts of the world, plotted on a world map. Windows freeware by G4ILO

Fatpigdog's Real Time FFT Audio Spectrum Analyzer - Fatpigdog's Real Time FFT Audio Spectrum Analyzer. User interface has the look and Feel of an HP Spectrum Analyzer. But, in addition to the regular Spectrum Plot, it also produces detailed Waterfall plots. The user can optimize the color map, chosing from a wide assortment of color themes. This analyzer supports multiple traces, trace arithmetic and normalization.