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Base Can you measure your I- Max 2000

Discussion in 'CB Antennas' started by AudioShockwav, Jan 6, 2020.

  1. Marconi

    Marconi Usually if I can hear em' I can talk to em'.

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    Thanks Robert. If you have a New Imax that is actually shorter, you may be the first to post the New Imax dimensions, from the bottom of the mount to the tip, that we are talking about.



    In the meantime, and if your radio can go well above the CB band maybe to 30 MHz, maybe you could check your match up around the top of 10 meters and report back.
     

  2. Recon

    Recon NY 881

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    Wow! Great info! The article was written and posted in 2002!
    Hats-off to Tech 833 for the doing the difficult and tedious task of removing the internal wiring from inside the fiberglass rods, especially the top section. I was curious if there would be an advantage of adding the ground plane kit to the MAX 2000 and as per the article, there is an advantage. After reading the article and viewing the photos, I understand how the tuning rings affect the VSWR.
    Are we to assume that the length and components of the base / coil section of the newest and shorter MAX 2000 is the same as always and the difference is in the length of the wiring in the fiberglass rods?
     
  3. Marconi

    Marconi Usually if I can hear em' I can talk to em'.

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    Good question Recon.

    Check out the link below where I posted my Eznec modeling idea for a matched Imax at 24' feet long and tuned at 27.205 MHz as compared to the New Imax at 22' feet long that shows us resonance results at 29.743 Mhz...just like the Old Imax Manual suggest.

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

    Here I simply shortened the original CB antenna by 24" inches in another thread discussing the New shorter Imax. This was done to see how the new length effects the results on shortening the radiator length.
     
  4. Recon

    Recon NY 881

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    Wow! This stuff is all new and confusing to me because my background and expertise is far away from radios and electronics, but......it appears to me that the 22' MAX 2000 isn't worth a darn for 11 meters.
     
  5. Marconi

    Marconi Usually if I can hear em' I can talk to em'.

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    When you get time maybe you can describe your thinking here.

    I did my model to see how shortening effected the performance and the results show the frequency is virtually what the Imax Manual Trimming Chart suggest on shortening by 24" inches. All this has to be tested in the Real World however, if we want to be sure.


    As yet I have not posted my models over Real Earth, but when I removed the radials, similar to what you suggest. the match went bad, as one might expect. However, the gain, angle, and pattern remained close to the same values as the model with radials. The matching feature I used only allows me to show a workable SWR so I can scan the bandwidth. This SWR scan does not reflect the predicted wide bandwidth the Imax is know for...so in that regard the matching was done for convenience.

    I will also post this model with no radials along with the models over Real Earth.

    Thanks for the questions.
     
  6. Marconi

    Marconi Usually if I can hear em' I can talk to em'.

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    As least you see what the models are suggesting. This is what this whole discussion is all about...the Imax is apparently not a CB antenna any more... unless maybe your have a tuner in-line.

    I'm curious to see if some ham operators are still able to work this new Imax as a multiband of sorts anymore.
     
  7. Recon

    Recon NY 881

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    The way I see it, it is a "win-win" for the manufacturer and they can't lose.
    The shorter antenna meets the shipping requirements and it will also cater to 10 meter guys/ gals.
    If the short antenna works best and only for the 10 meter band and is no good for 11 meters, then why keep the tuning rings? Why not design a shorter antenna without tuning rings?
    As stated on a previous post, new potential CB radio antenna buyers must ask the seller to measure the MAX 2000 antenna prior to ordering it. The folks who have / are receiving, assembling and installing the shorter antennas may have a difficult experience returning the antennas after disturbing the packaging and hardware and scratching the metal surfaces.
     
  8. techradioman

    techradioman Active Member

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    I use a tuner with mine and although I have other antennas for the other bands the IMAX is a great antenna on 10 thru 20 meters so i'd say for the performance of this antenna just use a tuner and be done.
     
    ENC Pirate likes this.
  9. Recon

    Recon NY 881

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  10. ENC Pirate

    ENC Pirate Ocean One Cape Hatteras

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    Are there ads somewhere for the 22 foot max? Just curious, Like I said most ads still say 24 feet , and I still dont believe radio antenna manufacturers build antennas to fit in a certain size box , a box about 8 inches shorter? huh? I dont doubt some company said that though. Unless I see mass sales of these listed at 22 feet,I'll go with the thought, these antennas were butchered to make use of Ham Bands and were not successful and returned. Was the 22 foot version in a 8 foot box?, if so case solved !This is more interesting than a Big Foot sighting,lol 73's
    Ocean One Cape Hatteras
     
    Cam Tetzlaff likes this.
  11. Recon

    Recon NY 881

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    It was back in November when Bell's CB Radio had published a statement that they would not sell the I MAX 2000 antennas because their personal inspections and measurements had verified thirteen out of fourteen antennas were much shorter than 24'.
    You may be correct about the new antennas being butchered. No one knows when Solarcon sold-out and maybe the work force left and new workers came in. If the antennas were mass produced on an assembly line, having a fabrication jig is a must so as just about anyone can build and assemble the antennas. We will never know the truth why the antennas are shorter.
     
    ENC Pirate likes this.
  12. Cam Tetzlaff

    Cam Tetzlaff 006 Wisconsin

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    Recon you bring up a great point and it made me re-think my previous measurements. Now.... I do have a disclaimer on this info I'm providing as I'm very sleep deprived from snow plowing streets. As I was in my previous post.

    I remeasured tonight. Previously I measured to the end of the threads on each section. And for the base of the antenna I measured to the bottom of the aluminum plate. Probably not accurate measurement points. So tonight I measured each section without taking the threaded portion into account and the bottom section I measured to the end of the SO-239. The 3 pics I'm posting are in order of top first, middle second and bottom last.

    Top section: 94"
    Middle section: 91.5"
    Bottom section: 94.625"
     

    Attached Files:

  13. Cam Tetzlaff

    Cam Tetzlaff 006 Wisconsin

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    Also the Max2000 box my antenna came in measured out at 96" +/- a half inch for cardboard flex/movement.
     
  14. Recon

    Recon NY 881

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    Total length equals approximately 23 feet and 3/8 inches.
    When a manufacturer advertises an antenna is 24' long, we believe it is the total length from end to end and nothing else.
    The confusing part of this mess is that the Owner's Manual states that the tuning rings have been set at the factory. Yeah, but for what frequency?
    If I lowered my 24' MAX 2000 and measured the location / position of the tuning rings and passed-on the information to this forum, the only guys who could use the measurements would be the guys having an antenna with the exact length as my antenna.
    Your antenna is about 5/8" shorter than my antenna, which tells me that the tuning rings are not at the same position.
     
  15. Cam Tetzlaff

    Cam Tetzlaff 006 Wisconsin

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    Right now I have the tuning rings locked in the position they were in out of the box. After work tomorrow I can take a measurement from the tip to the top ring, then put the rings in the actual middle and measure again.
     

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