Toying with this idea

Discussion in 'CB Radio Forum' started by mike5511, May 21, 2023.

  1. mike5511

    mike5511 Road Train Member

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    Got a 2020 GMC Sierra. I am always quick to say the tool box, and even the bed, on these newer pickups have lousy rf grounds. Been there done that. But, I am toying with mounting a 102" on the back (tailgate side) of my aluminum tool box. I will run at least 3 or 4 braided bonding straps to the bed, then to the cab. The reason I'm not thinking frame is the cabs on the new pickups seem to have an excellent rf ground as is. Oh, and a couple of straps from the hood to the body as well. I am curious if my theory will work? I have always intended to do like always and run one my Wilson's in the center of the roof (yes drill a hole). But this vehicle is garaged and while the Wilson whip will bend enough to clear, it is about at it's max to do so. Plus, I have a couple of Francis CB Amazers, a 7' SkipShooter, as well as the steel whips that I would enjoy experimenting with.
    Let the critiques begin.............
     
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  3. Night Stalker10

    Night Stalker10 Road Train Member

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    The roof mount is the best option, as I'm sure you know. But with all the antennas you've mentioned, the garage is going to be your biggest problem.
     
  4. mike5511

    mike5511 Road Train Member

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    Yes, and the whip on a spring will make that issue easy to deal with. My first antenna was a steel whip with a chain mount on the bumper of a 1970 Buick Skylark, with a Kris, 23 channel. Great setup!
    I'm probably going to try the above bonding method and see how it works. My theory is, I've never needed any bonding when mounted on the cab, either the roof or the front fender. (I won't be running over a couple 100 watts ever.) So, bonding the bed to the cab should bring it all together. Going from the bed to the frame as well sure wouldn't hurt anything, but it may not help much either. The big thing is making that tool box part of the bed, then the bed part of the cab.
     
    Last edited: May 22, 2023
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  5. Night Stalker10

    Night Stalker10 Road Train Member

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    Ah yes, the Kris CB radio, that brings back some old memories. I wanted a Johnson 123, but they were around $160 in the mid 70's, so I settled for a $80 Midland.
    To me the fender mount is the next best spot as far as easy installation goes. That's where I mounted my CB antenna on my 2008 Silverado. Unfortunately it won't fit my 2013 Sierra. The cheapest front fender mount is $40, which seems pretty high price for a small aluminum mount. I think I paid $20 for the 2008 mount. Anyway I'm sure you'll have good results with a little bonding.
     
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  6. mike5511

    mike5511 Road Train Member

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    I've got several fender mounts I had made years ago out of stainless steel, they will work on the GMC as well, so I'm good there. Thinner and much stronger. Wonder if my rubber mat in the bed will hinder the reflection?
     

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  7. Night Stalker10

    Night Stalker10 Road Train Member

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    That's a good question on the bed mat. I assume it wouldn't cause a problem. Do you have an antenna analyser? That would be the quickest way to find out.
     
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  8. Ridgeline

    Ridgeline Road Train Member

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    No, it won't unless it has metal in it which I doubt.
     
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  9. mike5511

    mike5511 Road Train Member

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    I didn't think it would but I wondered. What do you think about my bonding idea of just bonding toolbox to bed and bed to cab?
     
  10. mike5511

    mike5511 Road Train Member

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    I do. Rigmaster AA35 zoom.
     
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  11. Ridgeline

    Ridgeline Road Train Member

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    Toolbox to the bed, bed to the frame, and cab to the frame. The purpose is to build the other half of the signal path for a balanced antenna system.

    Using bonding straps on everything won't do a lot, it may quiet the radio down if there is ultrasonic RF from the control modules.

    I still have the new mount that I made for my beater that was wrecked out before I had a chance to install it. unlike the other which had one mounting point to the frame, this one has two and is made of a piece of square tubing that is mounted to the frame, with flat stock formed to support the antenna which fits between the bed and cab, and it was to be bolted to the bed. The original one did the same thing but it had one mounting point and it was off set a bit, which I wanted it centered.
     
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