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Delta 2000

Discussion in 'CB Antennas' started by secret squirrel, Jul 15, 2021.

  1. secret squirrel

    secret squirrel Lustrous Potentate

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    https://www.ebay.com/itm/303939989881?hash=item46c43c3179:g:0qIAAOSwKtBdrhGB

    Anyone know anything about the Delta 2000 CB Antenna.



    Claims to be more broad banded and have better internal radiator than A99,

    with an improved matching section.

    Just noticed this last evening.
     

  2. Eldorado828

    Eldorado828 8-2-8 in the Lonestar State

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    I saw that a while back and looks a lot like the tram 1498. I'm willing to bet it's another clone
     
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  3. DJboutit

    DJboutit Active Member

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    Looks like a A99 Imax copy
     
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  4. jdchet

    jdchet Supporting Member

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  5. Justme

    Justme Sr. Member

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    5.75 dBd gain for a 1/2 wave ...... must have big thumbs out there to suck that number from.
    I'll stick to the Imax 2 K working from 18/15/12/11/10 meters.
    No it's not a miracle antenna but it works and is cheap as chips since i got this one for free, better as a multiband ham antenna with lossy traps.
     
  6. M0GVZ

    M0GVZ Sr. Member

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    Using a larger diameter wire up the middle of it would make it more broadband without impacting efficiency. So if they chose to use braid instead of the thin solid wire that the Imax and A99 use that would make it more broadbanded on the band it's designed to work on.

    Multi-band coverage though, like the 15-10m the Imax can do depends on the matching section HOWEVER the Imax and A99 aren't actually true multiband antennas rather the values of resistance and reactance the matching sections produce on those bands result in a SWR that's within a usable range.
     
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  7. M0GVZ

    M0GVZ Sr. Member

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    No it isn't. It works as a multi-band antenna because of significant losses both in the matching section and your coax outside the 10/11m band. Traps in antennas like the Hustler BTV series have very low loss ,hundredths of a dB.
     
  8. Justme

    Justme Sr. Member

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    At 15 it is an high impedance 1/2 wave antenna so the matching network does fine.
    Coax used better as LMR 400 SWR on 15 1:1.3.
    Working every continent there so if it was a leaky dummy load there explain please why it works as good or better as my Fritzel FD-4 at 40 feet up also fed with better as LMR 400 Coax.
    The only difference i see is polarisation differences, sometimes the FD-4 wins sometime the Imax 2 K wins.
    Even on 18 MHz it works decent though there it needs the tuner for the swr is 1: 2.3.
    Same as 15 meter the FD-4 wins sometimes, sometimes the Imax 2 K wins.

    If i would have large losses using 1000 watts into it which i did over longer qso's it would have burned out the matching system on any of the bands used.
    losses of an trap are about 0.5 dB add several traps if you work with a multiband vertical trap antenna.
    Don't forget trap losses add up in multiband verticals...
    and mostly have a much narrower bandwidth.
    Traps also form a weak point in the antenna and need decent weatherproofing all the Imax 2 K does not need bar the antenna plug.

    So for 10/11 and 12 meter i have an full 5/8 antenna on 15 and 18 an 1/2 wave antenna.
    Every trap antenna uses 1/4 wave sections for the bands, traps with losses to couple the next section for the lower band etc.
    Even on 18 where the swr is a bit off with low loss coax i have relative low losses with a good tuner.
    on 15 where the system is good almost no losses.
    As on 12/11/10.
    I don't work 11 bar the 1 x a year saying hello to a good friend there.
    So, with all due respect i don't go with your observation.
     
    #8 Justme, Jul 18, 2021
    Last edited: Jul 19, 2021
    secret squirrel and tecnicoloco like this.

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