• [DXZone] Top Amateur Radio Websites - Issue 2218

    From DXZone via rec.radio.info Admin@21:1/5 to All on Mon May 30 21:09:59 2022
    XPost: rec.radio.amateur.equipment, rec.radio.info

    The DXZone.com Amateur Radio Internet Guide

    Top Amateur Radio Websites - Issue 2218


    Measuring with a MiniVNA, Automatic Arduino Antenna Switch, The KC5LDO
    Vertical Antenna, Decoder CW, 2 Meter Portable Yagi Antenna, Arduino Nano
    and si5351 Digital VFO/BFO, 70MHz Quarter Wave GP Antenna

    An introduction to the air cored coil

    Posted: https://www.dxzone.com/dx34873/an-introduction-to-the-air-cored-coil.html

    We use the term air core coil to describe an inductor that does not depend
    upon a ferromagnetic material to achieve its specified inductance. This
    covers the cases where there really is just air inside as well as windings
    upon a different insulator such as bakelite, glass or PTFE etc. Do you need
    an air coil?

    VSWR Calculator


    Software/RF Design
    This calculator converts between VSWR and Return Loss, Reflection
    Coefficient, Mismatch Loss, and Reflected Power.

    --- SoupGate-Win32 v1.05
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