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Can't get SWR below 3

Discussion in 'CB Radio Forum' started by MGE Dawn, Jul 9, 2019.

Page 2 of 2
  1. Jul 30, 2019 #11
    Ridgeline

    Ridgeline Road Train Member

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    Nope, power should not effect the swr. It sounds like common current mode problem.
     
    Ridgeline, Jul 30, 2019
    Ridgeline, Jul 30, 2019
    #11
    Meteorgray, rabbiporkchop and BigHossVolvo Thank this.
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  3. Jul 30, 2019 #12
    rabbiporkchop

    rabbiporkchop Road Train Member

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    Unless that power is at 54 megahertz going into a 27 megahertz antenna in which case it will
     
    rabbiporkchop, Jul 30, 2019
    rabbiporkchop, Jul 30, 2019
    #12
  4. Aug 3, 2019 #13
    mike5511

    mike5511 Road Train Member

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    mike5511, Aug 3, 2019
    mike5511, Aug 3, 2019
    #13
  5. Sep 14, 2019 #14
    rabbiporkchop

    rabbiporkchop Road Train Member

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    I wouldn't exactly call it a dirty trick.
    That driver Tom did exactly that and that's how he reached me from 74 miles away out of his Cascadia. I don't think he has any desire to make any changes to his antenna system any time soon.
     
    rabbiporkchop, Sep 14, 2019
    rabbiporkchop, Sep 14, 2019
    #14
  7. Sep 14, 2019 #15
    MGE Dawn

    MGE Dawn Road Train Member

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    Got the 10" shaft option and installed it, rotated about 20 degrees to the front, also swapped out for an aftermarket power supply. SWR is down to about 2.8 on 19, but I'd still like it to get a bit lower
    No, I haven't. Haven't been able to find a good tutorial, either, so would you be willing to ELI5?
     
    MGE Dawn, Sep 14, 2019
    MGE Dawn, Sep 14, 2019
    #15
  8. Sep 15, 2019 #16
    Ridgeline

    Ridgeline Road Train Member

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    Ok for some reason no one mentioned this ...


    Take the truck to someone who has an antenna analyzer and have them check the antenna.

    They can determine what is what with the antenna and possibly the coax but ...


    Your problem will be more likely an RF ground issue which is not a D.C. groUnd issue. There is something called common current mode which is many times caused by a bad RF ground..

    This idea of tilting the antenna won't help or fix the problem.
     
    Ridgeline, Sep 15, 2019
    Ridgeline, Sep 15, 2019
    #16
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