itu grid

Horizontal Half-wave Dipole above a Counterpoise - All antennas that are situated close to the ground are affected by that ground to some extent. This article explain effects and benefits of counterpoise.

The Joystick Antenna - The Joystick antenna was used many years ago as an all band vertical HF antenna under restricted space situations that would cover from 80 meters thru 10 meters with a tuner and was a great commercial success Some hams even had success with it on 160 meters.

PI4DX Contest Group Zeeuws-Vlaanderen - Contest station situated in the South West part of the Netherlands in the province of Zeeland

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

Patriot Hills Antarctica - K2ARB - Adam Brown's Blog from Latitude 80.19 South Longitude 81.16 West

CRARC - Canberra Region Amateur Radio Club (Formerly the Wireless Institute of Australia, ACT Division).

Te RADAR grou - The RACES ARES Disaster Assistance Repeaters (RADAR) group was formed by a team of amateur radio operators dedicated to providing high quality repeater communications for amateurs involved in public service communications or response to emergency/disaster situations.

W2SZ Rensselaer Polytechnic Institute - The Amateur Radio Club of Rensselaer Polytechnic Institute

YouTube - Amateur (ham) radio balloon launch - High-altitude ham radio balloon launch by several louisianna universities

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

Solar Panels and Home Kits - Solar Panels Grid Tie Systems, Kits, Fountains, Chargers and more

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

Arizona Near Space Research - Arizona near space research - promoting science and education by exploring frontiers in amateur radio and high altitude balloons.

AMSAT & High Altitude Balloons - Balloon Projects, scheduled launches at amsat

High Altitude Ballons

Suntracker: Wayne State University - Suntracker : high altitude, balloons, weather station, stratosphere, solar cells

UND High-Altitude Balloon Project - University of North Dakota High Altitude Balloon Project

BOREALIS - The Montana space grant consortium high altitude balloon program

OSCAR 25 - South Korean experimental microsatellite based on the SSTL UoSAT bus built by the Korean Advanced Institute of Science and Technology

Mid-Latitude Sporadic-E (Es) - This article was originally written in response to a brief review of the basics of sporadic-E

Remote Controlled TS-2000 Amateur Radio - K2gxt is the rochester institute of technology's (rit) amateur radio club, allow TS-2000 remote control via ham radio deluxe and skype

Radio Specialists - Radio Specialists Pty Ltd is situated in Adelaide, the capital of South Australia dealer for Yaesu amateur radio products.

W3DHJ - lunix utilities for Radio Amateurs - A small collection of bash scripts for pulling QTH info, grid square info, propagation charts, and monitoring prop logger postings.

Spectrum Analyzer Real-time FFT - Eight-channel Audio Spectrum Analyzer is a set of Real-Time Multi-Channel Gauges for investigation of data accepted from any ADC you will want or 16-, 24- and 32-bit ADC of sound card. WDM drivers support. FFT Spectrum Analysis, OscilloScope, Frequency counter, AC/DC voltmeter, Signal-to-Noise Ratio, Signal-to-Noise and Distortion, Spurious-Free Dynamic Range, Effective Number Of Bits, Total Harmonic Distortion, Inter-Modulation Distortion, Phase Shift. Special modes of dual-channel FFT spectral analysis: Separate channels spectra, Spectra of digital sum, difference, product of two signals, Spectrum of digital product of original signal and its fundamental, Spectrum of Real and Complex Transfer Function, Cross Spectrum. Standart weighing of spectra according IEC and CCIR. Oscilloscope modes (for dual-channel ADC) are: original signals, sum, difference, dependence of one channel on another, amplitude distribution of input signals.

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.