gps system

The simplest phased array feed system that works - How to calculate "phasing line" lengths that actually work.

Balun compilation - Collection of many home made baluns

Ground Problems - Collection of articles about ground systems

Line Isolator System - A system view of the line isolator

Antenna system in a shopping trolley wally - Multiband portable antenna system edited by Andy Foad G0FTD, consisting of an old cb antenna with it's 27Mhz matching coil, an antenna tuner, car battery and a transceiver

Optimizing Inductors - While intended mainly for antenna loading coils, this article also applies to other resonant systems, such as amplifier tank circuits.

Easy way antenna systems - Written by John M. Haerle, WB5IIR (SK). A must read for anyone considering building a good low cost HF multi-band antenna system.

A Quadruple Helix for AO-40 - A homebrew project of a quadruple helix antenna system based on G3RUH 16 turn helix antenna for 2.4 GHz.

Installing Wire Antennas - Before selecting an antenna system, you must first find a place to put it. A selection of techniques to setup antennas upon trees using pulleys or other tools

Peet Bros Company - Manufacturer of advanced electronic systems to measure such weather data as: wind speed, wind direction, wind chill, pressure, humidity, rainfall, and dew point.

Sunlight Energy Systems - Sunlight Energy Systems provides charge solar controllers and power supply products for amateur radio applications and solar panels usage

Tennamast - Tennamast design and manufacture a wide range of fabricated metal goods, Antenna masts, Wind-sock masts, and masts for holding such systems as CCTV, Loudspeakers, Lighting units

K0XG Systems - Tower and antenna rotation equipment, insulators, rotor control cables, ancillary products

Lightning Prevention Systems, Inc. - Premier company that offers advanced products and services to protect today's structures from lightning

Expanded Spectrum Systems - Flash crystals, Feakin' beacon keyer, beacon attenuator

Spectrum Instruments - Spectrum manufactures very high-performance, low-cost, GPS-disciplined time and frequency reference standards for industry, scientific, calibration, broadcast and amateur operators.

AN Wireless Tower Company - AN Wireless is a manufacturer and distributor of Self Supporting Tower Systems for Wireless Communications, Wireless Internet, Wireless Networking, Microwave, Paging, Broadcast, Two-Way Radio and Amateur Radio.

Rotating Tower Systems - Using our components you can build a rotating tower with greater capability than 3-4 static towers. A rotating tower allows common rotation of HF stacked arrays, VHF and UHF arrays, and antennas mounted at optimum heights. Component design also allows tower shunt loading and end support for wire antennas

F5VLB amateur radio astronomy station Priority listing - F5VLB and EA4EOZ have designed a small but powerful system using satfinder and standard LNB to make radioastronomy. A step by step descritpion for the novice about radioastronomy, VLB and listening to echo of meteorite.

How to make your ham radio system mobile - How to make your ham radio system mobilemany ham radio operators carry radios for fun, safety and public service activities. radios for both vhf and hf frequencies can easily be installed in vehicles.

HFPack - HFpack provides an information exchange about transceivers, antennas, systems, HF packs, propagation, new developments and techniques in HF portable operation. Radio Amateurs are invited to participate in egroup and on-the-air nets around the world.

Circuit Specialists - We specialize in pc-based data acquisition systems, test equipment, electronic components, disk on modules, choke and coils, diodes, capacitors and connectors, potentiometers, crystals, resistors, relays

SatTrack Suite - Satellite Tracking and Orbit Propagation, Reports and Mission Planning Products, Pass Scheduling and Orbit Event Analysis, Dynamic Communications Link Modeling, 3-D Visualization of Complex Scenarios User Defined Regions and Contours, Constellation and Formation Flying Support, Global Positioning System Coverage

Build a simple rechargeable CMOS Battery - An inexpensive rechargeable CMOS battery system that can be built from readily available parts.

Common-Mode Noise - Receiving Common Mode Noise shows how lack of a balun can contribute to system noise