Best way to mount an IMAX 2000?

Discussion in 'Antennas, Feedlines, Towers & Rotors' started by KC9VFO, Jul 13, 2012.

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  1. KC9VFO

    KC9VFO Premium Subscriber QRZ Page


    My friend gave me an IMAX 2000 to see if I wanted to use it for 10 meters. After some inspection I decided this was the best option.
  2. WB2WIK

    WB2WIK Premium Subscriber QRZ Page

    I'd clamp on a reel at the bottom and some line guides along the length, add a nice handle and bingo.

    "Whatcha castin' there, son?"

    "IMAX 2000."
  3. KC7YRA

    KC7YRA Ham Member QRZ Page

    LOL. When I read the title of this thread, I was thinking "in the trash". Then I clicked in and saw the pic. LOL.

    At least pull the aluminum off and recycle it.

  4. N3JBH

    N3JBH Ham Member QRZ Page

    Oh boy :rolleyes: this should get some response. Some folks think there darn great antenna's. Personally i tore it apart just to see what made it tick and salvage what i thought be useful like the mounting plate.
  5. WB2WIK

    WB2WIK Premium Subscriber QRZ Page

    There used to be some really great all-aluminum CB antennas in the good old days. Some law made them illegal years ago (electric shock hazard prevention stuff -- really silly). But I see some are coming back now as 10m amateur antennas, which are okay as aluminum.

    The old Antenna Specialists Super Magnum and such were very good. Sure a lot better than the Solarcon, IMAX, etc. At least they're making a comeback as ham antennas.
  6. W9GB

    W9GB Ham Member QRZ Page

    You are missing the TWO Mast (Saddle) clamps - aluminum and stainless steel clamp will cost you about $6 to $10 each.
    Get out your TAPE MEASURE , take measurements, andthen select appropriate U-Bolt.
    DX Engineering has a wide selection for this type of repair.

    You then need a mast, at least 1-1/4 inch OD -- which is same size as TV antenna mast.

  7. KC9VFO

    KC9VFO Premium Subscriber QRZ Page

    Actually I robbed the U bolts and threw them in my junk drawer. :)
  8. K8JD

    K8JD Ham Member QRZ Page

    It would have been a good antenna to work local 10M FM repeaters. If you can set your A/B split freq to do 100 kHz split and switch the rig's mode to FM.
  9. KC7YRA

    KC7YRA Ham Member QRZ Page

    Exactly. I would love an old, all aluminum vertical that I could put onto 10. These fiberglass jobbers just don't hold up here. Poor construction and lackluster performance.

  10. N4BWD

    N4BWD Ham Member QRZ Page

    Send it to me! I want it!
  11. KI6USW

    KI6USW Ham Member QRZ Page

    Lets just compare a Hustler 4BTV (10, 15, 20, & 40M) to the Imax 2000 (10, 12, 15, & 17m):

    Lossy traps in the Hustler and Imax? YES

    Cost about the same (~$120)? YES

    Can work four different bands? YES

    Both can be ground-mounted or elevated? YES

    Do they both require radials for best performance? YES

    Both benefit from using an antenna tuner? YES

    Do they both belong in the garbage? YES and NO.

    Depends what fits your needs, pocketbook, and location. Sure there are better antennas. But if one considers the cost, what you get for your money, and ease of installation - I think there isn't that much difference between the two. Except for the bands used.
    Last edited: Jul 14, 2012
  12. KC7YRA

    KC7YRA Ham Member QRZ Page

    Well, the Imax can work 4 bands with a tuner. Whereas the 4BTV is resonant.

    Other than that, the construction techniques are the big divider in both of those. Thin fiberglass shell or aluminum tubing.

  13. KI6USW

    KI6USW Ham Member QRZ Page


    One other thing. If one uses/adds the proper radial lengths for 20m and 6m; the Imax can do those too. However, that evidence is second-hand. The anecdotal evidence is found in the eHam reviews. But I have used the Imax on all of the bands I mentioned. Made some long-path skip on 17m to Japan and Ireland from here in CA though - using a tuner to clean up the small mismatch. The other three bands didn't need it.

    The 4BTV - I dunno . . .
    Last edited: Jul 14, 2012
  14. K2HAT

    K2HAT Premium Subscriber Staff Member QRZ Page

    I have an IMAX 2000 here, that with an external tuner, I have used it on 40m, nope not great for 40m,
    but when it was the only antenna I had for HF it was better than none.

    Works pretty darn good for 10-17m, it helped me to get my WAS and DXCC. ;)


    73 K2HAT Lee :)
  15. WB2WIK

    WB2WIK Premium Subscriber QRZ Page

    Good job, Lee. Testimony to probably good operating, good timing, and knowing what band to be on when -- all part of ham radio!

    I like that approach, a lot.

    I've worked DXCC in less than 8 hours during a contest, and worked DXCC even on 80 meters (took 36 hours, though) in a contest, using a lot of big antennas and kilowatts. Not much of an accomplishment, really. Running 100W in casual operation with a small antenna it's a much better accomplishment, and you learn a lot along the way.
  16. KA1MDA

    KA1MDA Ham Member QRZ Page

    That is not an accurate comparison. A Hustler 4BTV is RESONANT on 10, 15, 20, and 40 meters. The Imax 2000's radiating element is RESONANT only on 10 OR 11 meters. As such, the Imax is a 1 band antenna vs the Hustler being a true 4 band antenna, although you can fool yourself into thinking the Imax is a multiband antenna by using a tuner.

    Traps are not automatically "lossy". That's a result of advertising hype by the manufacturers of antennas which do not use traps. In fact, there is far more loss incurred using a single band antenna with a tuner in the shack than there is in using a multiband trap vertical with no tuner. Contrary to your statement, the Imax 2000 has no traps- it has a single, very lossy matching network in the base to fool the radio into thinking the antenna is resonant on more than 1 band. Such a matching network, similar to that used in a Comet CH250B, can EASILY create upto 10 dB of loss.

    Another issue which you do not address is radiation angle, or vertical take-off angle. A trap vertical will have a much lower take off angle on all the bands it covers based on the fact that each band sees a quarter wavelength long antenna. An antenna like the Imax will only have a low take off angle on 1 band (10 or 11 meters). As the frequency of operation goes down, the radiation angle will increase, due to the antenna being electrically shorter.
  17. PA5COR

    PA5COR Ham Member QRZ Page

    For 10 meters it's a 5/8 antenna, for 15 it is a 1/2 wave antenna, 12 and 17 are close to the 10 and 15 meter band for that wideband coupling to work.
    Even a 1/2 wave end fed antenna has a low angle of radiation as does the 5/8 antenna.
    Whatever the story's tell, i worked on 10/12/15/17 worldwide with 100 watts in it, and all continents.
    The other antenna's Fritzel FD-4 and inverted L of 77 feet with autotuner at the feedpoint.
    Comparing the Imax 2000 with 5 meter long radials on the roof with the FD-4 at 45 feet up the lower angle mostly took care of a better signal on 10/17.
    That "lossy"network could handle 1 KW fine on 17 meters, if there had been 10 dB loss i'm sure it would have burned out with that power, some have put in even more power to it....

    It handled that power on all bands from 10 down to 17, i don't use it for 20, there the inverted L works better or the FD-4 OCF.
    For a free, given to me, antenna it does quite fine, thank you.

    I don't look down on the antenna never work 11 meters but if it works on my bands, it is a good thing to have.
    I got mine for free, and it's on the roof for 9 years now, withstood all storms, and at 35 feet above ground it gave excellent reports from all over the world, what more can you ask from a free antenna?
    My radials are just 4 wires of 5 meter length that go from the baseplate laying on the roof in a 45 degree angle.

    Will there be better antenna's? yes undoubtly, but this was free, fits on my roof and does work all over the world.
    Last edited: Jul 15, 2012
  18. KC9VFO

    KC9VFO Premium Subscriber QRZ Page

    I have been carrying around an old Hustler JR 27 aluminum 5/8s wave cb antenna for the last 30 yrs, but they are uuuuugggglllyy. Probably work good on 10 though. I have an Old Yaesu ft101 I can use also. I am leaning towards a ridged dipole for 10. Been too hot and dry here for any antenna work, all our time is spent watering bushes and gardens etc lately.
  19. M0GVZ

    M0GVZ XML Subscriber QRZ Page

    Why did you do that? They work very well on 10m. I used an Imax 2000 as my sole antenna in the October 2011 CQ-WW-DX contest and made over 700 contacts in 24hrs on 5 continents with it using no more than 100W.
  20. KC9VFO

    KC9VFO Premium Subscriber QRZ Page

    Why? Because it is a piece of junk. The fiberglass is cracked all the way through where it is epoxied in the metal connectors, lucky if it would stand up on its own. The guy who gave it to me said he only had it for 5 yrs. Imax 2000s belong in the garbage in my view. Your mileage may differ.
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