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Sloper antenna plans

Discussion in 'General Technical Questions and Answers' started by KI4OAE, Mar 17, 2006.

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  1. KI4OAE

    KI4OAE Ham Member QRZ Page

    I need some plans for a sloper wire antenna. When I get my rig to do 20 and 40 meters, I most likely won't have enough space for a dipole unless I make a hamstick dipole, so I figure I could go with the sloper, since conditions where I am seem to be ideal for one. There's only one problem... I can't seem to find plans for one anywhere. I've searched this site, google, etc. If I had a copy of the ARRL handbook, I'm sure it'd be there. So, can someone help a po' boy out?
  2. AG3Y

    AG3Y Guest

    Sure ! Get a copy of the ARRL handbook ! ! ! I am not trying to be a smart*** , but seriously, you cannot begin to pick up the information that is found in just one copy of that valuable publication in years of surfin' the web.

    My serious recommendation is to get one about 10 years old from any number of hamfests that are coming up in the next month or so. You will have all the basics for "building a dipole" ( one of our favorite questions to fall all over, here on QRZ.COM ) and so much more.

    No ham worth the title should be without a copy of the handbook, along with the antenna book, the VHF/UHF operators handbook, etc. etc.

    I am not pushing the League here, but you really can hardly do better than to get any of those publications I've mentioned.

    Best luck, and 73. PS, I am working up a 20 meter sloping wire ground-plane to fasten to the side of my old short TV tower here, myself !

    73 again, Jim
  3. K4LEM

    K4LEM Ham Member QRZ Page

    What bands are you wishing to cover. Slopers for single band easiest to design. If You want 80 meters, expect to use at least a 60 foot tower or if you are on side of a hill a 40 foot mast.

    Radials should be kept about 0.07 of a wavelength off the ground and use about four. More better, but with diminishing returns. [​IMG]
  4. KI4OAE

    KI4OAE Ham Member QRZ Page

    I'm about a good 20 feet up easily here. I think I'm looking more for 20 and 40 meter coverage right now. What kind of angle should the sloper have?
  5. WB2WIK

    WB2WIK Premium Subscriber QRZ Page

    A new Handbook is pretty expensive, but here you can buy a used one for $6.75.

    Older Handbooks are just as good and useful as newer ones are -- actually some of the much older handbooks from the 1960s are more useful than the newest 2006 edition, when it comes to simple questions like this:

    Nobody can answer your question properly because you didn't say what kind of sloper you're talking about:

    -A full sloper is a 1/2-wave, center fed dipole that just happens to have one end higher than the other.

    -A half sloper is a 1/4-wave, end fed wire using either a tower or the earth and a radial system or both as a counterpoise

    -The half sloper can be fed at the top and worked against a tower (to form the "other half" of the antenna), or fed at the bottom (ground level) and worked against ground

    -The length of a full sloper is 468/f(MHz) = feet. The length of a half sloper is 234/f(MHz) = feet. A typical slope angle is 45 degrees.

    Buy the book.

  6. W4SE

    W4SE Ham Member QRZ Page . I bet you can you find a link to the answer to you question on AC6V's site . [​IMG]
  7. N3BIF

    N3BIF Guest

    make a standard dipole for the band of interest and then put one end as high as possible and the other wherever convenient but not within reach of someone on the ground for safety reasons. Run the feedline away from it at 90 degrees. The reason plans are obscure is because the sloper is a variant of a dipole or doublet.
  8. K4LEM

    K4LEM Ham Member QRZ Page

  9. AD5LT

    AD5LT Ham Member QRZ Page

    Got a deal for you, a 1977 13th edition of the ARRL
    antenna book, paper back edition in fair shape for it's years that I will send to you free of charge, I will even pay the shipping do you want it?
  10. KI4OAE

    KI4OAE Ham Member QRZ Page

    oh yeah! You know I'll take that!
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