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Thread: Kio hex beam and rotor question.

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  1. #11
    Join Date
    Jan 2008
    Location
    Overland Park, KS
    Posts
    5,859

    Default

    Quote Originally Posted by KD8HBS View Post
    Thanks to all for the info and helpful links and information.
    KD8HBS

    @AC0FP
    What model rotor are you using with that setup?
    I have heard the KIO hex beam can be turned with a tv antenna rotor.
    Are you using a balun?
    The rotator is a NTE U-106 with a NTE thrust bearing TB-105. The KIO assembly instructions recommend coaxial ferrite chokes, I made my own broadband ferrite choke array since the beam was a 20 through 6 meter antenna.
    [FONT=T93Y][COLOR=#0000ff][B]ACFP

    [/B][/COLOR]
    [/FONT]

  2. #12
    Join Date
    Oct 2007
    Location
    Michigan
    Posts
    119

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    Quote Originally Posted by WB2WIK View Post
    If you want to see what a typical "rotator shelf" looks like, go here: http://rohnnet.com/rohn-25g-tower

    Hit "25G Brochure Download" (it goes fast) and go to Page 37 in the brochure. Look at the rotator shelf BAS25G. That's pretty much what they all look like. It's not "part of" the tower, it installs between the legs of the tower by just tilting it into position through the rungs and clamping it in place.

    The Rohn 25G leg spacing is 11-1/14" leg-to-leg (center-to-center). If that's what your tower is, then that very plate would work. If not, there's lots of other plates to choose from, or of course almost any sheet metal shop could simply fabricate one.

    You always want to install the rotator inside the tower if at all possible.
    Found the rotor plate as you described. I will do the measurements on my tower to see if its a match. If not I still see this as a better way to mount the rotor and mast to the antenna than what I described in my original post.

    Any advice on a choke balun?
    ferrite beads?
    I would have to remove my PL-259 off my LMR-400 coax.
    Not looking forward to that.
    Although it would be easier on the pocket book.

    I also found this choke balun http://www.balundesigns.com/servlet/...-dipole/Detail

    I figured I could mount a balun like this and run my Lmr-400 to it.
    Then a more flexible type of coax to the Hex Beam.

    KD8HBS

  3. #13
    Join Date
    Jan 2008
    Location
    Overland Park, KS
    Posts
    5,859

    Default

    Quote Originally Posted by KD8HBS View Post
    Found the rotor plate as you described. I will do the measurements on my tower to see if its a match. If not I still see this as a better way to mount the rotor and mast to the antenna than what I described in my original post.

    Any advice on a choke balun?
    ferrite beads?
    I would have to remove my PL-259 off my LMR-400 coax.
    Not looking forward to that.
    Although it would be easier on the pocket book.

    I also found this choke balun http://www.balundesigns.com/servlet/...-dipole/Detail

    I figured I could mount a balun like this and run my Lmr-400 to it.
    Then a more flexible type of coax to the Hex Beam.

    KD8HBS
    The type of balun recommended by KIO is ferrite beads over coax. This is also what I used. The balun you pictured appears to be intended for use with wire dipole.
    [FONT=T93Y][COLOR=#0000ff][B]ACFP

    [/B][/COLOR]
    [/FONT]

  4. #14
    Join Date
    Oct 2007
    Location
    Michigan
    Posts
    119

    Default

    Quote Originally Posted by AC0FP View Post
    The type of balun recommended by KIO is ferrite beads over coax. This is also what I used. The balun you pictured appears to be intended for use with wire dipole.
    How about one of these baluns?
    http://www.gigaparts.com/store.php?a...ku=ZRW-B11-ISO
    http://www.mfjenterprises.com/Produc...ductid=MFJ-915


    KD8HBS

  5. #15
    Join Date
    Aug 2004
    Location
    Des Moines, IA
    Posts
    5,859

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    ACH,
    Member ARRL, SKCC #215, NAQCC #3441, FISTS #11993

  6. #16
    Join Date
    Oct 2007
    Location
    Michigan
    Posts
    119

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    Quote Originally Posted by AC0H View Post
    Thanks,
    I plan on using the same rotor and thrust bearing as your are using. I'm on a budget and everything adds up so fast.
    Hope to have the Hex up by spring.

    KD8HBS

  7. #17
    Join Date
    Dec 2004
    Location
    Riley Ks
    Posts
    630

    Default

    I have a hex beam from Leo and I love it. I get good reports constantly.
    You will like the Hex beam. It is a good solid, well thought out antenna. Read his directions before you begin.
    It makes assembly go faster with fewer problems.

    I put in a 90 degree on the SO239 on the upright post and weather sealed it.
    As for beads and how many beads, Leo tells you what to use and how many.
    I used the clamp on and I think I put 6 on the coax. I taped them on with many turns of black electrical tape.
    At the coax feed point I slid the coax through a piece of PVC about a foot long and pushed it up to the 90 to help keep the coax from touching the post and taped and plastic tied it down.

    If you follow the directions you will have good SWR on all bands you ordered with it. I have a 5 band. 6M-10M-15M-`17M-20 M.
    The winds here play havoc with the RS TV rotor I use. Had to have a new one replaced once.
    I have to recalibrate rotor after each high wind storm of over 40 mph. It does not move a lot but due N is then NNW or NNE. Easy fix.

    Enjoy.

    KB0YYO
    Gordon
    Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge.

    Never under any circumstances,take a sleeping pill and a laxative on the same night.

    Cats know your every thought.
    They don't care,
    but they know.

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