SWR help needed

Discussion in 'CB Radio Forum' started by dallas77, Jan 28, 2013.

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  1. Jan 28, 2013 #1
    dallas77

    dallas77 Bobtail Member

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    Jul 31, 2012
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    I have a general lee that I have installed in a freightliner dump truck. I can tune my antenna to 1.5-1 on ch 1&40 then wait a couple of days and my swrs will be like ch 1 2.5 ch 40 3.5. I have tried different mounts,coax,antenna's, with no luck. When I installed everything was new.
     
    dallas77, Jan 28, 2013
    dallas77, Jan 28, 2013
    #1
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  3. Jan 28, 2013 #2
    Big Duker

    Big Duker "Don Cheto"

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    Have you tried to use a different meter??
     
    Big Duker, Jan 28, 2013
    Big Duker, Jan 28, 2013
    #2
  4. Jan 28, 2013 #3
    kor b

    kor b Light Load Member

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    Dec 16, 2008
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    Looks like antenna grounding is
    what you should focus on to me.
    Bracket to door metal, door metal
    to body. Door hinges don't do the
    Job of a flat braided strap.
     
    kor b, Jan 28, 2013
    kor b, Jan 28, 2013
    #3
  5. Jan 29, 2013 #4
    Turbo-T

    Turbo-T Road Train Member

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    You wouldn't have bumped the band switch over would you? That can/will change the SWR if the antenna is not tuned for it.
     
    Turbo-T, Jan 29, 2013
    Turbo-T, Jan 29, 2013
    #4
  7. Jan 29, 2013 #5
    dallas77

    dallas77 Bobtail Member

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    Jul 31, 2012
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    I have tried two different meter with same results. I have run a 10ga wire from the antenna bracket to the door jamb. No on the band switch.
     
    dallas77, Jan 29, 2013
    dallas77, Jan 29, 2013
    #5
  8. Jan 29, 2013 #6
    kor b

    kor b Light Load Member

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    How long is that 10 gauge wire?
    Flat braided strap is a lot better.
     
    kor b, Jan 29, 2013
    kor b, Jan 29, 2013
    #6
  9. Jan 30, 2013 #7
    EZ Money

    EZ Money Road Train Member

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    The East Side Gang,Charlotte,NC.
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    What kind of antenna? Does it get worse during or after rain?
     
    EZ Money, Jan 30, 2013
    EZ Money, Jan 30, 2013
    #7
  10. Jan 30, 2013 #8
    dallas77

    dallas77 Bobtail Member

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    Jul 31, 2012
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    The 10 gauge wire is about 20" long. I have tried Hustler SCB center loaded and a firestick.No it stays about the same when raining I thought of that and changed my mount. Where is a good place to find the braided ground straps?
     
    dallas77, Jan 30, 2013
    dallas77, Jan 30, 2013
    #8
  11. Jan 30, 2013 #9
    kor b

    kor b Light Load Member

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    20 inches is to long, it has a tendency to radiate.
    I have gotten ground straps from Nappa,
    Google flat braided ground straps.
    Or look on chargercharger.com

    I just looked at www.chargercharger.com and there
    under coax,cable,
     
    kor b, Jan 30, 2013
    kor b, Jan 30, 2013
    #9
  12. Jan 30, 2013 #10
    kor b

    kor b Light Load Member

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    Dec 16, 2008
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    Bump for ground strap info.
    Short ground straps are better than long ones.
     
    kor b, Jan 30, 2013
    kor b, Jan 30, 2013
    #10
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