T680 has two CB antenna connectors

Discussion in 'CB Radio Forum' started by Drifter667, Apr 10, 2026 at 3:21 PM.

  1. Apr 10, 2026 at 3:21 PM #1
    Drifter667

    Drifter667 Bobtail Member

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    Anyone know why I have two connectors?

    I've been using the thicker cable that seems to have two seperate cables going into it hoping that it's the cable for the two antenna mounted to my sleeper.
    20260410_115614.jpg 20260410_115757.jpg 20260410_115352.jpg
     
    Drifter667, Apr 10, 2026 at 3:21 PM
    Drifter667, Apr 10, 2026 at 3:21 PM
    #1
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  3. Apr 11, 2026 at 9:20 PM #2
    Night Stalker10

    Night Stalker10 Road Train Member

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    The thicker cable is generally used for a co-phased antenna system, which has two antennas mounted on both mirror mounts. The smaller coax is probably for the dipole antennas mounted on the back of the cab, which someone installed.
     
    Night Stalker10, Apr 11, 2026 at 9:20 PM
    Night Stalker10, Apr 11, 2026 at 9:20 PM
    #2
  4. Apr 12, 2026 at 12:18 AM #3
    Drifter667

    Drifter667 Bobtail Member

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    Drifter667, Apr 12, 2026 at 12:18 AM
    Drifter667, Apr 12, 2026 at 12:18 AM
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  5. Apr 12, 2026 at 12:20 AM #4
    Drifter667

    Drifter667 Bobtail Member

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    My truck doesn't have mirror mounted antennas, the ones on the rear are Kenworth brand too.

    I don't know if it matters but it's a 2026 with the small camera mirrors.

    I might have some digging to do.
     
    Drifter667, Apr 12, 2026 at 12:20 AM
    Drifter667, Apr 12, 2026 at 12:20 AM
    #4
  7. Apr 12, 2026 at 10:19 AM #5
    Night Stalker10

    Night Stalker10 Road Train Member

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    Okay, if you have or know someone with an antenna analyzer, it would give you a good idea. Do you hear anything with either coax hooked up? If you do, then unscrew the antenna from the mount on the cab. If the signals disappear, then you know which cable goes to that antenna. Unfortunately I'm not familiar with the t680 antenna system.
     
    Night Stalker10, Apr 12, 2026 at 10:19 AM
    Night Stalker10, Apr 12, 2026 at 10:19 AM
    #5
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