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EH for 40 meters by CO6HK - Article on a homebrewed EH antenna for 40 meters band in spanish

10m Halo antenna project - This aerial is designed to fit into a small attic, loft or roof space, or even into the garden shed by Roger Powell G0AOZ

My Quad Project - My Quad Project. Simple to build in a weekend. 2 Element vertcal polarity. 99 percent off the shelf parts. Light weight.

Analysis Of Antenna Mast Strength and Bending Stress - Calculations for determining the wind loading stress on an antenna mast. Link to a spreadsheet for calculating the mast bending stress based on wind speed and antenna cross sectional area.

W3PGH Greater Pittsburgh VHF Society - A Nonprofit Society Dedicated to Furthering the Interest of VHF/UHF Operation in the Greater Pittsburgh Area.

ScanHallCounty: Live Hall County Sheriff, Fire, and EMS Radio - This site allows you to listen to Hall County, Georgia Sheriff and Fire Department radio communications.

The ElectraSlide Antenna - Modification of the DK3 design by Don Johnson, W6AAQ. No voltage dropping, operates on the full 12 volts. The control switch and the matching toroid are supplied. All you need is a standard 3/8 by 24 thread ballmount, 2 wire sheilded microphone cable for control wiring, and a CB whip cut to resonance.

Precision Mastech Enterprises - Established in 1987 in manufacturing analogue and digital multi-meters and various testing instruments.

Electronix Express - Online shop for all electronics needs. Cables, Buzzers all kind of electronic components capacitors, inductors, relays, resistors crystals transformers, hardware like knobs screws nuts and washers, opto electronics, diodes and transistors, soldering desoldering products, test equipmemt and tools

Axel Telecom - Axel TELECOM was established in 1992 to provide communication solutions for businesses in Romania. Kenwood dealer

D-StarLet - D-Star Radio Messaging System - A web-based text messaging application using D-Star digital data technology. Client server environment, where server can run linux windows or macos os with apache tomcat by Dean K. Gibson.

W2IOL GCGC Distance/Bearing - Freeware dos and linux command line executables to calculate grid great circle/geodesic distance, azimuth/bearing and MUF calculator by W2IOL

AmateurRadio Ham Test - Free software tests for the Technician, General and Extra class licenses by Shenandoah

CQRLOG for Linux - CQRLOG is a Linux advanced ham radio logger based on Firebird database. Provides radio control based on hamlib libraries.

IBP - Beacon Monitor - Linux program that helps one with monitoring the beacons of the International Beacon Project, by continuously showing which beacon is transmitting on which frequency, along with the distance and antenna directions by PA3FWM

RSCW - RSCW is a Linux/Unix program for decoding morse signals using the computer's sound card. It has been written/optimized for digging weak signals out of the noise.

LinRepeat Priority listing - LinRepeat is free repeater control software for Ham Radio that runs on Linux. It is easily configured and modifiable, and is licensed under the GNU Public License version 3 (GPLv3). It's intended to be as simple, fast, and stable as possible. It relies on other software such as Gstreamer although the program itself is written entirely in Perl.

HF software digital modes for linux - This software allows a standard PC soundcard to be used as a shortwave data "modem". The whole processing is done on the main processor CPU. Support RTTY Amtor (Sitor) and Pactor 1 by Thomas Sailer, HB9JNX/AE4WA

QAntenna - Freeware antenna analyzer for linux

SPLAT! for Windows - This free software is useful for visualizing terrain and performing Longley-Rice path loss and coverage prediction using the Irregular Terrain Model. A Windows port of the Linux-based SPLAT by John Magliacane.

Interactive Digital Filter Design - This is an interactive filter design package, for designing digital filters

LC Filter Design - This is an interactive design package for designing analogue (i.e. hardware) filters made of inductors and capacitors (Ls and Cs).

70 MHz Transverter - This purpose of this page is to give a brief description of a 70 MHz transverter that has been published in the Danish amateur radio magazine "OZ"

Tube Data Sheet Locator - Resource for finding data on vacuum tubes.

EDUCYPEDIA Tubes datasheets