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• Simple HF Baluns for 50/75 ohm coax - Show diagrams, winding methods and tables of some 1:1 and 4:1 baluns for 1.8 - 30 MHz suitable for use up to 200W (400W peak) on systems using 50 or 75 ohm coaxial cable input where SWR should not exceed 1.6:1.
  [ Hits: 15208 | Votes: 25 | Rating: 4.32 ]

• Feeding an End-Fed Antenna - End-Fed antennas are NOT balanced systems; but neither are verticals, ground planes, discones, windoms, zepps, Marconis, half-slopers, et al. Additionally, the low-impedance antenna port of your transmitter/receiver is not balanced.
  [ Hits: 21455 | Votes: 22 | Rating: 7.33 ]

• Verticals. Ground systems and some history - Article gives a good overview of the basics and reflects the accepted wisdom from BC antenna work.
  [ Hits: 1626 | Votes: 1 | Rating: 10 ]

• 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 ]
• Entegrity Wind - Wind Turbines - Entegrity wind systems is a leading manufacturer of commercial-scale wind turbines with installations worldwide.
  [ Hits: 386 | Votes: 0 | Rating: 0 ]

• Unified Microsystems - W9XT contest card DVK Digital Voice Keyer, morse keyers CW memory keyer, beacon CQ IDer, USB interfaces and more for ham radio operators
  [ Hits: 4936 | Votes: 2 | Rating: 5 ]

• XYtronic - Soldering and de-soldering professionals. Provide quality stations, irons, and rework systems
  [ Hits: 484 | Votes: 0 | Rating: 0 ]

• EQS Systems - Test and measurement instrumentation, AC & DC power supplies, power sources and analyzers, data acquisition systems and boards
  [ Hits: 397 | Votes: 0 | Rating: 0 ]

• 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.
  [ Hits: 550 | Votes: 0 | Rating: 0 ]

• Structural Components - Designer and supplier of tower reinforcement systems to the wireless industry.
  [ Hits: 528 | Votes: 0 | Rating: 0 ]

• D-StarUsers.org - D-star amateur radio systems, your source for d-star digital amateur radio. D-Stars users website
  [ Hits: 608 | Votes: 2 | Rating: 7.5 ]

• K6MVR MVRC Radio Club - The Mt.Vaca Radio Club (Call sign K6MVR ) owns and operates repeater systems in and around Sacramento, California. The systems provide reliable coverage for mobile stations throughout the Sacramento Valley region and beyond to Modesto, Chico, the Sierras, and parts of the Bay Area.
  [ Hits: 1061 | Votes: 1 | Rating: 10 ]

• 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 ]

• Power Port - Handheld Radio Pouches, Power Supplies, Solar Recharging Systems, GPS Navigation Devices and 12V Accessories
  [ Hits: 762 | Votes: 0 | Rating: 0 ]

• Number One Systems - Professional ready-to-use PCB design product.
  [ Hits: 729 | Votes: 2 | Rating: 5.5 ]

• QSL Maker  ^{updated  pop} - Freeware Windows QSL card printer software. This tool will let you create you own QSL cards importing pictures and customizing colors and other cards aspects. Print directly to your ink-ject or laser printer. Runs on windows systems by wb8rcr
  [ Hits: 32397 | Votes: 56 | Rating: 5.79 ]

• FreeSCAN - Freeware windows program for programming the Uniden SC230, BC246T, BC330T, BCD396, BC15T and BCD996T scanners. FreeSCAN allows to download and uploading programming, remote control the scanner, log hits, and supports printing out of systems and groups.
  [ Hits: 2875 | Votes: 14 | Rating: 6.01 ]

• Test Tone Generator - 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.
  [ Hits: 14751 | Votes: 32 | Rating: 5.5 ]

• 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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