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Base New Imax wont tune 11m....this sucks

Discussion in 'CB Antennas' started by 357, Apr 25, 2018.

  1. 357

    357 Walkin' the dog

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    Took my old Imax down today and put up a new one.
    right at factory its 2-1 on 26.965, 1.6 on 27.405 and 1.35 on about 28.000 then shoots up after that.
    I put the rings in the middle and got 1.05 on 28.485 but 27.385 sucked.

    Just love spending $200 and risking my life for a piece of junk...


    IMG_3000.JPG IMG_3001.JPG IMG_2999.JPG






    Unreal.:oops:

    gonna climb up and try the rings low but I know its gonna be crap.

    ** I put the rings about 1/2 inch from the bottom.
    Best swr is 1.47 at 27.780, 1.56 at 27.385 then its 2.0 at about 26.200.
    fricking garbage
     
    #1 357, Apr 25, 2018
    Last edited: Apr 26, 2018

  2. wavrider

    wavrider W9WDX Amateur Radio Club Member

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    Straight out of the box assembled on test tower the IMAX I installed had decent vswr.
    Maybe you got a faulty IMAX.
    I did not have to adjust or "tune" any rings they come factory preset.
     
  3. 357

    357 Walkin' the dog

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    My Imax I had in 2009 was great, 1.1 CH6.
    Even in the rain! (thats why I switched from the maco 5/8, shitty swr in the rain, IMAX never had that problem, before but now they come from the factory, cracked...)




    1.06 on CH38




    Ok I put a dummyload on the end of the coax in the tree.

    24.990 50, 50, 1.8, 1.6 1.02swr
    26.935 Z 50ohms, R 50 ohms, PH 1.2, X 1.0 1.02 swr
    27.385 53.4, 53.4, 0.3, 0.4 1.05 swr

    Coax seems good, these antennas are either known defects that they flog on ebay or just junk right from the get-go.
     
    #3 357, Apr 26, 2018
    Last edited: Apr 26, 2018
  4. 357

    357 Walkin' the dog

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    Got rings just under 1/2 way.
    1.28 at 27.990 on and 1.68 on CH19

    not very happy with that.
     
  5. JoeDirt

    JoeDirt Well-Known Member

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    My rings are split one high and one low
     
    357 likes this.
  6. 357

    357 Walkin' the dog

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    I'll try that.
    Did you glue them?
     
  7. 357

    357 Walkin' the dog

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    1 up 1 down, 1.08 on 28.200 1.42 on CH38

    tried 1 up 1 middle, 1 down 1 middle, no dice.
    Giving up for the day.
     
    #7 357, Apr 26, 2018
    Last edited: Apr 26, 2018
  8. 357

    357 Walkin' the dog

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    IMG_3003.JPG


    Right on Solarcon

    (n)
     
  9. Unit 194

    Unit 194 Well-Known Member

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    I never had to adjust any rings on my IMAX either.
     
    357 likes this.
  10. Cabin 4

    Cabin 4 New Member

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    A99 is same set up with the tuning rings. Never needed to make any adjustment to them. But reading this thread someone mentioned gluing the rings. I'm not sure glue is best but I think a dab of silicone on the edge of the rings where they meet and just below and above the rings on the threaded sections is a good idea to keep them from moving over time. Anyone else do something like this?
     
    357 likes this.
  11. 357

    357 Walkin' the dog

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    Whens the last time you purchased the Imax?
     
  12. wavrider

    wavrider W9WDX Amateur Radio Club Member

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    357
    About 2 years ago and I got it off flea bay.
    I did install an rf choke aka ugly balun at feed point
    Dunno if that makes any difference or not.
    Now if I remember the imax was not exactly 1:1 on the chicken band frequencies but it had a better match on 10 meters.
    I use it on 15 meters thru 10 meters nothing above 1.7:1 vswr according to the antenna analyzer.
    You may have just got a faulty one, I have heard a few complaints about ops receiving faulty ones.
     
    357 likes this.
  13. 357

    357 Walkin' the dog

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    3 faulty ones in a row.

    IMG_3004.JPG


    You might be thinking, "oh his coax is bad, got water in it..."
    nope, its a year old Times Microwave LMR400
    I put a dummy load on the end of the coax, it was fine.
    I am gonna take my rf "choke" off today and try it with the lmr400 straight to the antenna but I really dont see it making much difference.
    When I first installed the imax at this 20 it was new, used a mfj to tune the antenna then, got a best of a 1.3 on 40, it too would only get 1.1 way up on 28.400 or more.
    The lower I put the rings, the worse it got, sure its 1.6 all the way to 22mhz but that dont do jack s**t for me on 11m.

    Obviously solarcon give ZERO FUCKS and the quality sucks the last few years.
     
  14. Mudfoot

    Mudfoot Sr. Member

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    What are you going to do with them?
     
  15. 357

    357 Walkin' the dog

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    I'm not sure.
    I need to get 1 working, I guess I'll put the old one back up with the 1.3 swr.
     

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