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Stock CNG Freightliner Antenna's for Cobra 29 LX

Discussion in 'CB Radio Forum' started by Rambler470, Jan 26, 2016.

  1. Jan 26, 2016 #1
    Rambler470

    Rambler470 Bobtail Member

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    Aug 3, 2015
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    Ok,

    I drive a CNG Freightliner truck. All the trucks have a CB tray mount with antenna hookup and power as stock.

    All the fleet also has two antennas on either side of the cab above the door.

    I bought a Cobra 29 lx and hooked it up. I am getting an antenna error and SWR of 3 or over.

    I can pickup the channels on the weather band as far as I can tell.

    Anyone have any idea of why the antenna's may not be working with the cobra?

    Is there a different CB that they "would" work with?

    The fact that all the trucks have the CB hookup with Antenna connection makes me think they must be working...But no luck..
     
    Rambler470, Jan 26, 2016
    Rambler470, Jan 26, 2016
    #1
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  3. Jan 26, 2016 #2
    tnevin225

    tnevin225 Road Train Member

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    Jan 1, 2014
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    Factory coax and antenna are usually junk ,run a good 18' of shielded coax to one good antenna. Something like a Wilson, should work good for you.
     
    tnevin225, Jan 26, 2016
    tnevin225, Jan 26, 2016
    #2
    Rambler470 Thanks this.
  4. Jan 26, 2016 #3
    Hick

    Hick Heavy Load Member

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    Dec 4, 2014
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    I have this same problem on a 2012 KW T700.

    I had another 29, it got lost (long story), bought this one to replace it. Had it hooked up in a rental T700. High SWR. Took it out when I got out of the rental and stuck it in this one, same problem. I'm wondering if it got trashed while I had it hooked up in that rental.

    There's really no place to ground another antenna. The mirrors and everything else is plastic or fiberglass.

    Subscribing.
     
    Hick, Jan 26, 2016
    Hick, Jan 26, 2016
    #3
  5. Jan 28, 2016 #4
    Rambler470

    Rambler470 Bobtail Member

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    I know if you attempt to transmit for a long period of time it will damage the transistors in the CB.

    Don't know how long "prolonged transmitting" would be.
     
    Rambler470, Jan 28, 2016
    Rambler470, Jan 28, 2016
    #4
    Hick and White_Knuckle_Newbie Thank this.
  7. Jan 28, 2016 #5
    12 ga

    12 ga THE VIEW FROM MY OFFICE

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    This is the time to listen to your radio but don't try to talk on it. Go to a CB shop and let them sell and match you a good antenna and mount. Take the factory antennas off and use the dashboard tray and power supply.
     
    12 ga, Jan 28, 2016
    12 ga, Jan 28, 2016
    #5
    White_Knuckle_Newbie Thanks this.
  8. Jan 28, 2016 #6
    Rambler470

    Rambler470 Bobtail Member

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    the problem is that it's a company truck and when it breaks down, they will just give me another one. I need minimal investment/semi-portability.
     
    Rambler470, Jan 28, 2016
    Rambler470, Jan 28, 2016
    #6
  9. Jan 28, 2016 #7
    12 ga

    12 ga THE VIEW FROM MY OFFICE

    1,568
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    Oct 21, 2013
    Central Michigan
    0
    .

    Take the mount, antenna and coax out and put it in the other truck. You will still be further ahead. If all the trucks are exactly the same, the SWR will not be that far off.
     
    12 ga, Jan 28, 2016
    12 ga, Jan 28, 2016
    #7
    Rambler470 Thanks this.
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