Electrical Length vs. Actual ?

Discussion in 'General Technical Questions and Answers' started by TIERONE, Oct 13, 2021.

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  1. TIERONE

    TIERONE QRZ Member

    If you connect 3, 12 gauge wires at their ends, the first being 265 ft. long, the second being 264 ft. long, and the third being 263 ft. long,..... How will the assembly behave in an antenna environment? Will it act more like the longer wire, the shorter wire, or something in between?
     
  2. K6CLS

    K6CLS Ham Member QRZ Page

    Are the wires laying parallel, or say at 120 degrees apart?

    I doubt +/- 1 foot makes much difference at that low frequency.
     
  3. K8JD

    K8JD Ham Member QRZ Page

    connected end-to-end is 792 ft of wire. that's a quarterwave at 295 KiloHertz !
     
    AK5B, KI5WW, KN6FWT and 1 other person like this.
  4. K0UO

    K0UO Platinum Subscriber Platinum Subscriber QRZ Page

    End to end it might look like a HF Traveling-wave type antenna.

    If it is low to the ground, it would be a Slow traveling-wave type antennas called a Beverage.
    At 792 foot, it would be a great RX antenna for 169/80/40 meters

    73 from,
    The K0UO " Rhombic Antenna Farm" 2 miles of wire in the Air & On the Air daily
     
    TIERONE likes this.
  5. KA0HCP

    KA0HCP XML Subscriber QRZ Page

    "It will perform quite well as a paperweight". Ahem. You have asked an unanswerable question. You have given us no information with which to give an intelligent answer.

    *Please don't be coy with us. What is the application? Frequency? Installation parameters? Operating goal?
     
    AK5B, WE4E, TIERONE and 1 other person like this.
  6. TIERONE

    TIERONE QRZ Member

    I apologize, let me be more definitive. Parallel wires (caged dipole type application) total assembly no longer than the longest single wire.
     
  7. WB2WIK

    WB2WIK Platinum Subscriber Platinum Subscriber QRZ Page

    What's the application and how high above ground would the cage dipole be?

    That will determine all sorts of things about how it works. What you describe would be resonant below the 160m amateur band if it were installed as a center-fed dipole; and if not high above the ground, well below the 160m amateur band.
     
  8. WE4E

    WE4E Premium Subscriber QRZ Page

    Target frequency?
    Vertical or horizontal, or some combination?
    Fed against ground? Radials? In the center?

    I'm with HCP, not nearly enough information to render a conclusion.
     
    AK5B likes this.
  9. TIERONE

    TIERONE QRZ Member

    Sloper with radials 80 M.... 67 feet down to 35 ft.
     
  10. WB2WIK

    WB2WIK Platinum Subscriber Platinum Subscriber QRZ Page

    Your posted wire lengths would make it full-wave and the posted elevations would make it such a gentle slope the low end would be around 200' out from the feedpoint location.

    Why do that?
     

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