pa system

pa system

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• Trapped dipole for 80 and 40 m - This article explores a theoretical model for the losses of an 80m / 40m trapped inverted V dipole antenna system using a bootstrap coax trap, but does not examine the pattern of the antenna.
  [ Hits: 2731 | Votes: 0 | Rating: 0 ]

• Four square phased verticals - This page is a short description of the four phased verticals system i've build and used. It is primarily intendend to be used on the lower bands 160m, 80m, 40m.
  [ Hits: 3258 | Votes: 16 | Rating: 6.76 ]

• HF antenna for high rise dwellers - If you have ever tried transmitting on HF from a tall block of apartments, where it's just not possible to erect a substantial aerial system, then this article is for you
  [ Hits: 5015 | Votes: 5 | Rating: 7.92 ]

• Verticals. Ground systems and some history - Article gives a good overview of the basics and reflects the accepted wisdom from BC antenna work.
  [ Hits: 1627 | Votes: 1 | Rating: 10 ]
• 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.
  [ Hits: 526 | Votes: 0 | Rating: 0 ]

• Mackenzie Highway Network - The Mackenzie Regional ARC currently Operates the VE6PRR (146.82- ) repeater. It's located approximately 15 Km North of Peace River. It is linked to the SARA system via Grande Prairie. We are currently in the process of expanding the coverage by adding number of repeater sites through out the area.
  [ Hits: 335 | Votes: 0 | Rating: 0 ]

• The Vancouver Island Trunk System - To provide a network of open Amateur radio repeaters, for general and emergency communications use, throughout Vancouver Island, surrounding waters and parts of the lower mainland on the West Coast of British Columbia Canada.
  [ Hits: 1346 | Votes: 3 | Rating: 8.33 ]

• NI4CE West Central Florida Group, Inc - Founded in 2001 to manage and operate West Central Florida's only regional linked amateur radio repeater system. Currently, the NI4CE Repeater System operates nine repeaters from five sites with more on the way. NI4CE covers all or parts of twelve counties in West Central Florida and provides mobile coverage along the areas I-75 and the I-4 corridors.
  [ Hits: 817 | Votes: 3 | Rating: 7 ]

• W3UER Delaware County Amateur Radio Association - Linked Repeater System in Darby, PA
  [ Hits: 492 | Votes: 0 | Rating: 0 ]

• Ginlong Technologies - World leading specialist in manufacturing, providing design services for small scale wind turbine systems and parts (<30kW)
  [ Hits: 368 | Votes: 0 | Rating: 0 ]

• RF Circuit design basics - Ebook by Akira Matsuzawa Tokyo Institute of Technology, Building blocks in RF system and basic performances, Device characteristics in RF application , Low noise amplifier design, Mixer design and Oscillator design
  [ Hits: 1272 | Votes: 1 | Rating: 1 ]

• PlentiPeppa.com APRS Web server and live streaming web cams - All about my hobbies, Ham Radio, Automatic Packet Reporting System and my live streaming web cams and much more!
  [ Hits: 729 | Votes: 1 | Rating: 10 ]

• ARRL Experimenting with Icom D-Star Digital System - ARRL has embarked on a project to learn firsthand what D-Star digital technology has to offer and to assess its capabilities in a real-world Amateur Radio environment.
  [ Hits: 569 | Votes: 0 | Rating: 0 ]
• PAPA System - The PAPA Amateur Radio repeaters are located on some of the best hill tops in Southern California!
  [ Hits: 1094 | Votes: 8 | Rating: 8.87 ]

• Packet Radio on a Windows CE device made simple - How to use packet radio using the WindowsCE operating system
  [ Hits: 2524 | Votes: 1 | Rating: 1 ]

• Is HF propagation reciprocal - Some test circuits using the ACE-HF System Simulation & Visualization software, about reciprocal propagation on HF bands by NW7US
  [ Hits: 523 | Votes: 1 | Rating: 7 ]

• Wire Free Direct LtD - UK company that's a full-line dealer for wind and solar power systems, plus system design.
  [ Hits: 405 | Votes: 0 | Rating: 0 ]

• NBEMS - The Narrow Band Emergency Messaging System (NBEMS) for Windows is a suite of software programs designed for point-to-point, fast, error-free, emergency messaging up to or over 100 miles distant, and takes up a very minimum of frequency space on the ham bands, leaving more space for other ham activites.
  [ Hits: 1308 | Votes: 1 | Rating: 10 ]

• Freakin Beacon Setup Program - A small program to simplify changing messages in the Expanded Spectrum Systems Freakin' Beacon controller. The program makes it easy to modify an existing message or to have multiple messages available in different files ready to program into the beacon controller.
  [ Hits: 1287 | Votes: 1 | Rating: 1 ]

• Phase Noise. - This is perhaps the most important parameter in many oscillators and it deserves an in-depth discussion on what it is, how it affects a system and how it can be minimised in an oscillator design.
  [ Hits: 612 | Votes: 0 | Rating: 0 ]

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