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End Fed Wire Antenna Problem

Discussion in 'Ham Radio Discussions' started by K5DYL, May 2, 2021.

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  1. K5DYL

    K5DYL Ham Member QRZ Page

    I set up a end fed antenna for my 7300, Palomar 9:1, 4:1 unun. 67 feet of wire. The antenna worked fantastic for at least 6-8 months. Now on 40 meters it trips my GFI outlet that the power supply is plugged into. Only on 40, not 20, or 80. Do you think the unun is bad? It may have gotten moisture inside, but there is no visible damage inside.

  2. KU4X

    KU4X Premium Subscriber QRZ Page

    There's a forum for that.

  3. K5DYL

    K5DYL Ham Member QRZ Page

    Ok, sorry, i posted it in that forum now
    KU4X likes this.
  4. N1YR

    N1YR Ham Member QRZ Page

    I'm suspecting it's RFI sensing and not overload.
    We had GFCI outlets in a command unit motorhome that would trip whenever we transmitted on a 1-watt 800 MHz portable in the same room.

    It may be the EFHW antenna changing, as you wondered.
    But first, ask yourself, "Have any additional antennas, I mean appliance cords, been plugged into outlets on the same circuit before the trouble began?"
  5. K5DYL

    K5DYL Ham Member QRZ Page

    That is one thing I haven’t tried yet, i do believe i moved the linear to another plug, but not the power supply. I did ad a new Isobar power strip. I’ll check that tomorrow. Thanks for the idea. And it trips with anything over 40 watts out.

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