impedance

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impedance

124 links - and 2 categories

Antennas : 160M
  • Isolation chokes for 160m verticals - An article on how much impedance you really need and how small can be a chooke for top band vertical antennas by N6LF
    [ Hits: 628 | Votes: 0 | Rating: 0 ]
Antennas : End-Fed : End Fed Half Wave Antenna
  • End Fed Half Wave Antenna - An easy to deploy antenna, commonly considered the best solution for portable operations. Thir article includes a simple LC parallel circuit to match the impedance by IW7EHC
    [ Hits: 1382 | Votes: 2 | Rating: 1.5 ]
Antennas : Feed Lines
  • Twin Feed experiment - Experimenting a low impedance feedline by G3TXQ
    [ Hits: 343 | Votes: 0 | Rating: 0 ]
  • Transmission line calculator - A windows impedance calculator software by VK3UM
    [ Hits: 1201 | Votes: 4 | Rating: 3.75 ]
  • Antenna feed impedance - Article on antenna feed impedance and the importance of matching RF andtennas to feeders, including notes on Radiation resistance, loss resistance, and efficiency are also detailed.
    [ Hits: 430 | Votes: 1 | Rating: 10 ]
Antennas : Feed Lines : Choke
  • Common-mode chokes - Chart that present results of impedance measurements made on a variety of common-mode choke implementations across the frequency range 1MHz to 30MHz by G3TXQ
    [ Hits: 605 | Votes: 2 | Rating: 4 ]
  • RF Chokes - A chart presenting the results of impedance measurements made on a variety of common-mode choke implementations across the frequency range 1MHz to 30MHz by G3TXQ
    [ Hits: 904 | Votes: 2 | Rating: 7.5 ]
Antennas : Feed Lines : Open Wire
  • Parallel Circular Conductor Transmission Line Calculator - Design a parallel circular wire balanced transmission line with this online calculator. This calculator is a tool for designing balanced transmission lines with a specific desired characteristic impedance Zc and made of parallel circular conductors of a given diameter d.
    [ Hits: 631 | Votes: 6 | Rating: 4.5 ]
Antennas : Quad
  • Quad or Loop antennas - Quad and loop antennas comparisons, evaluating the impedance and gain of both antennas and considerationso n horizontal loop antennas for low bands by PA0FRI
    [ Hits: 1712 | Votes: 10 | Rating: 4.9 ]
  • 2 Meter 5 Element Quad - A five element quad antenna for 144 MHz DIY Project. This 2 Meter 5 Element Quad antenna was modeled using EZNEC, with a boom from a UHF TV antenna and CPVC pipe for spreaders. Constructed for 146MHz, it exhibits a gain of 10.7dB and an impedance of 75 ohms. Real-world results surpass the HT antenna, reaching over 20 repeaters up to 75 miles away. The design, costing around $10, employs simple tools for assembly.
    [ Hits: 1884 | Votes: 9 | Rating: 6.23 ]
Manufacturers : Cable and Connectors
  • Messi e Paoloni - High quality RF coax cables designed for ham radio use featuring high efficiency screening attenuation and transfer impedance.
    [ Hits: 241 | Votes: 2 | Rating: 10 ]
Radio Equipment : Antenna Analyzers : Array Solutions AIM 4170D Software : Antenna analysis
  • Zplots - MS Excel document that allows you to plot SWR, resistance, reactance, impedance magnitude and angle and more from a variety of sources
    [ Hits: 657 | Votes: 1 | Rating: 10 ]
Technical Reference : Amplifiers : RF Amplifiers Theory
  • Measuring Zs in solid-state amplifier - Measuring the output impedance (Zs) of solid-state broadband HF amplifiers operating in class AB eham article by ZS6BIM
    [ Hits: 488 | Votes: 0 | Rating: 0 ]
Technical Reference : Coax Cables and Connectors Technical Reference : Test Equipment
  • Antenna Scope - Do you want to measure antenna impedance at resonance? With this Antenna Scope, you have a simple RF Bridge for getting started in an exciting part of Ham Radio, building your own Antennas that work well
    [ Hits: 832 | Votes: 1 | Rating: 1 ]
Technical Reference : Vector Network Analyzer
  • Digital HF Antenna Analyser Project - This antenna analyzer measures complex impedance over the 1.6 - 33 MHz HF spectrum
    [ Hits: 1385 | Votes: 0 | Rating: 0 ]
  • Measuring line impedance with MiniVNA - How to measure the characteristic impedance of a unknown transmission line using MiniVNA
    [ Hits: 694 | Votes: 1 | Rating: 8 ]
  • VNA calibration kit - A calibration kit useful when you need known reference impedances to properly calibrate your vector network analyzers.
    [ Hits: 300 | Votes: 0 | Rating: 0 ]

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