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net line

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Antennas : Baluns Antennas : Dipole
  • The Cobra antenna - This article explores the Cobra Junior linear loaded antenna for 80m to 10m bands. This antenna is a linear loaded dipole described by W4JOH in 73 magazine June 1997
    [ Hits: 1497 | Votes: 0 | Rating: 0 ]
Antennas : EH
  • EH antenna for 11 meter - A very simple Eh antenna for 11 meter, drawings in english and italian.
    [ Hits: 2814 | Votes: 8 | Rating: 3.5 ]
Antennas : Feed Lines
  • RF Transmission Line Loss Calculator - This calculator computes the matched line loss for a transmission line using a model calibrated from data for the transmission line types built in to the calculator. It also gives an estimate of the mismatched loss if the mismatch is specified.
    [ Hits: 579 | Votes: 2 | Rating: 1 ]
Antennas : Feed Lines : Choke
  • Homebrew RF chocke - Magnetic Longwire Balun - RF Choke to prevent hf currents on the feedline. This Magnetic Longwire Balun (MLB) makes it possible to efficiently use a coaxial lead-in cable with all forms of longwires, T-forms or other types of wire antennas, without the need for an antenna tuner.
    [ Hits: 3410 | Votes: 3 | Rating: 10 ]
  • RF choke or 1:1 balun - RF Choke to prevent hf currents on the feedline or...1:1 Choke Balun, sometimes called the "UGLY BALUN"
    [ Hits: 3246 | Votes: 6 | Rating: 3.83 ]
Antennas : Theory
  • The Petlowany Principle - Spipral antenna principle by a concept of Bill Petlowany, K6NO. Tak Antennas are based on this principle, using spirals as dipole linear wires.
    [ Hits: 864 | Votes: 1 | Rating: 10 ]
  • Smith Chart Basics - Smith Chart it is a graphic tool for solving transmission lines problems
    [ Hits: 312 | Votes: 1 | Rating: 10 ]
Antennas : Vertical
  • 13m high elevated vertical - This article explores the performance of an unloaded elevated vertical, base matching and feed line as a multi-band HF antenna system.
    [ Hits: 1356 | Votes: 0 | Rating: 0 ]
Antennas : WiFi
  • Linear Focus Parabolic Wifi Antenna - This antenna can be made in a couple of hours and involves a fair amount of measuring, cutting, bending, and bolting metal.
    [ Hits: 3443 | Votes: 5 | Rating: 4.4 ]
CB Radio : Clubs
  • Sierra Alfa - Italian official club Sierra Alfa DX.
    [ Hits: 533 | Votes: 11 | Rating: 8.82 ]
DX Resources : Nets
  • Baja Net Home Page - The Baja Net is one of the boaters favorite nets on the West Coast. It has a long history of handling traffic for mariners who are out of touch with friends and family. Several stations have phone patches enabling them to put you right on the line to talk to your loved ones.
    [ Hits: 1111 | Votes: 3 | Rating: 1 ]
Ham Radio : Exams : Exam Practice
  • eHam.net Ham Exams - Online ham radio practice exam by eHam, allow practice current exams but also old amateur radio exams based on old licence classes.
    [ Hits: 1531 | Votes: 13 | Rating: 7.24 ]
Manufacturers : Antennas : HF
  • GB Antennas and Towers - Dutch Antenna and Tower Manufacturers from Slimline Square Triangular Round Towers. Antennas production include Yagi Monoband/Dipole/HF Quad /50MHz and 70MHz Yagi-Quad, VHF-UHF yagi-Quad and Comby antennas VHF/UHF/SHF
    [ Hits: 2218 | Votes: 0 | Rating: 0 ]
Operating Modes : Morse code : Learning Morse Code
  • LCWO Learn CW Online  updated - At LCWO you can learn Morse telegraphy (CW) online in your browser, use Koch Method, compare your results with others, speed practice and more
    [ Hits: 1006 | Votes: 782 | Rating: 8.51 ]
Software : Linux
  • linsmith - A Linux Smith charting program. You can enter either discrete components or transmission lines, see the results on screen and/or generate Postscript output. Component values can be changed numerically or using scrollbar
    [ Hits: 556 | Votes: 0 | Rating: 0 ]
  • phpHamLog - Amateur radio open source log program written in PHP. Put your log online for visitors to browse in real time. Access your log from any web browse, can run under windows linux and macos with apache, mysql and php
    [ Hits: 1424 | Votes: 1 | Rating: 1 ]
Software : Weak Signal
  • WOLF GUI - GUI for the KK7KA Wolf software, that was originally written as command line interface only. Wolf is a weak signal software
    [ Hits: 600 | Votes: 0 | Rating: 0 ]
Technical Reference : Amplifiers : VHF Amplifiers
  • 600W 50Mhz power amplifier - G3WZT design for a bi-polar 600W Linear Power Amplifier for the 6M band.
    [ Hits: 1722 | Votes: 0 | Rating: 0 ]
  • 100W 50Mhz power amplifier - G3WZT design for a single stage bi-polar 100-150W Linear Power Amplifier for the 6M band.
    [ Hits: 2729 | Votes: 5 | Rating: 3.6 ]

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