lightning protection sys

Double-L Antenna For 80 and 160 - A vertical antenna for 80 and 160, fed with a single feed line that is simple, effective, and requires no ground system.

VHF Dipole with Gamma Match - 2 meters band VHF dipole with gamma match system

G3WZT Phased Verticals - Vertical phased antenna systems plans by G3WZT

160m-6m Directional Array - Stealth 19 element directional antenna array system for 160m to 6m

Phasing Systems - Antennas, Standard Delay Line Systems, Crossfire Phasing or Hybrids

Reversible Beverage Antenna Setup - A DX Engineering RBS-1P reversible beverage antenna system installation

Antenna resonance and bandwidth - About antenna or aerial resonance and bandwidth and the impact of RF antenna resonance and bandwidth on radio communications systems.

No Tuner Antenna System - Article on resonant antennas systems by KA3MRX

Antenna Matching - Antennaa matching basics, matching input impedance, reactance vs. SWR, info on inductive matching and UNUN Matching systems. Capacitive Matching Odds & Ends by K0BG

A robust rotor fixing system - A robust rotor fixing system using roller bearings, easy to maintain without unmounting the antenna by F6ITS

160 through UHF rotating tower system - This is the 195-foot tall rotating Rohn 55G tower at W8JI with yagis for 40 20 15 and 6 meter bands.

I1YRB live repeater - Listen to italian repeater system IR1CJ

Naval - Marine antennas and systems for navy, merchant shipping, work boats and fine yachts

Transradio - With the new name TRANSRADIO, the former TELEFUNKEN SenderSysteme AG enters into the new digital age of Broadcasting – DRM.

Cobham Microwave Priority listing - Cobham Microwave has a long term experience in Microwave Systems and Components. Their five areas of capabilities are Systems and Components: Diodes & Modules, Ferrite Devices, RF Filters, and Waveguides.

LBA Technology - LBA - DTV & RF test systems; AM antennas; RF shielding; RF compliance, safety, interference, intermodulation services; AM detuning, Antenna SWR Analyzers

Clean RF Systems - RF Samplers and demodulators

RSQ Signal Rporting for Digital Modes - This site is devoted to promoting RSQ as an improved signal reporting system for narrow band digital modes and to demonstrating its application to the popular PSK31 mode.

EchoMac - EchoMac is a client program for OS X that allows connection to the Echolink system

Sound Company Virginia - Sound System Alexandria, Baltimore, Maryland, Washington DC Priority listing - Sound company virginia provides audio equipments, audio tape recorder with the capability to directly record live spoken words with highest audio quality.

HamSatDroid - This software predicts future passes for amateur radio satellites for a specified location and period of time. It runs on the Android operating system

ACE-HF PRO - System Simulation & Visualization Software for Hams and Short Wave Listeners

phpPredict - Implementation of NORAD SGP4/SDP4 algorithms in PHP for determining a satellites location and velocity in Earth orbit. These SGP4/SDP4 models were ported from Predict 2.2.3 written by John A. Magliacane (KD2BD) for the Linux operating system.

Frequency Response Plotter - Draw static response time of an audio system. Originally intended for loudspeakers tests, is also a great tool for looking at microphone equalisation.

Lightning protections - HB9TMW page about lightning protection solutions