gps system

Coaxial Transmitting Chokes - Understanding Common Mode and Differential Mode Currents on Transmission Lines by K9YC

Coaxial or Open Wire - Coaxial or Open Wire Transmission Systems at HF Broadcast Stations

Polarization, lines of force - While polarisation may seem insignificant compared with other considerations in setting up a communications system, choosing the right type can make significant improvement in performance.

SARL Beacon Project on 40 Meters - The beacon project is a South Africa national system of beacons on the 40 meter band operating on a single frequency

G4IRX Beacon Monitoring - Beacon monitoring system by G4IRX setup at IO92JV

North East Wisconsin Communications Network Priority listing - N.E.W.Comm Net is a (G.M.R.S) General Mobile Radio Service System and Network of fixed and mobile radio communications operators in northeast Wisconsin.

W8HVG/R Independent Repeater Association - Independent repeater association. ham radio linked repeater system in michigan

W3UER Delaware County Amateur Radio Association - Linked Repeater System in Darby, PA

Penninger Radio - Portable Base Systems, Mast Clamps, Aluminum Tubing

Ultrasonic Systems - Manufactures high performance spray coating equipment based on patented ultrasonic spray coating technology.

XYtronic - Soldering and de-soldering professionals. Provide quality stations, irons, and rework systems

LP Technologies - A world leading developer of spectrum analyzers, RF system, test equipment and microwave solutions

EQS Systems - Test and measurement instrumentation, AC & DC power supplies, power sources and analyzers, data acquisition systems and boards

Gage Applied Technologies - Gage applied technologies designs and manufactures high-speed data acquisition systems, high-speed digitizers in pci / cpci / pxi or pc oscilloscopes, providing utmost measurement fidelity for high frequency signals.

Applied Instruments - Applied instruments manufactures test and measurement equipment for the broadband telecommunications industry. products include carrier generators, signal level meters, rf switches, spectrum analyzers and a return alignment system.

Latchways - fall protection systems - Latchways are the world leaders in fall protection and the manufacturers of the mansafe range of products for working at height.

Prestigecom - Australian dealer for UHF CB radios, Amateur Radio HF VHF Radios, GPS navigation systems, two-way radio, cordless telephones, radar detectors, marine electronics, amateur radio gear and many other consumer electronic products.

Number One Systems - Professional ready-to-use PCB design product.

DStar Comms Priority listing - Email, GPS Beacon, GPS Tracker, Text Chat, Private messages, internet Network node (link across the internet). Dstar Comms can be used for email deployment, GPS Tracking, reliable communication plus much more. Availble in free and commercial version

Test Tone Generator  ^updated - This Test Tone Generator (TTG) turns your PC into a function generator and enables you to demonstrate, test and tune sound systems, create sound effects and a whole range of other uses to suit your needs. It can also be used for educational purposes.

Efficient ground system - Article shows how to develop a good external ground system to complete your station’s protection.

Amateur Radio Grounding to Protect Against Lightning - Protecting the ham radio stations, using a good ground system

Why You Need Lightning Protection - The need for lightning protection, how a lightning protection system works

Lightning Protection Specifications - Materials, installation, inspections and certification

Ligthning: Protecting Towers - An interconnected concrete tower base can help the tower ground system.