• [DXZone] Top Amateur Radio Websites - Issue 2218

    From DXZone via rec.radio.info Admin@1:396/4 to All on Monday, May 30, 2022 11:09:59
    From: rec-radio-info-request@panix.com (DXZone via rec.radio.info Admin)


    The DXZone.com Amateur Radio Internet Guide

    ///////////////////////////////////////////
    Top Amateur Radio Websites - Issue 2218

    Posted:
    https://www.dxzone.com/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

    Antennas/Coils
    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

    Posted:
    https://www.dxzone.com/dx34872/vswr-calculator.html

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

    --- NewsGate v1.0 gamma 2
    * Origin: News Gate @ Net396 -Huntsville, AL - USA (1:396/4)