Antenna Tuning

Discussion in 'CB Radio Forum' started by mike5511, Oct 17, 2023.

  1. mike5511

    mike5511 Road Train Member

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    I was at a rally last week (folks that pull 5th wheel RVs with a semi) And checked a half dozen or so antennas with the RigExpert AA 33 Zoom. Most of them needed to do some bonding before anything could be done to help them. But one guy had this "rubber ducky" antenna mounted on a Cascadia. It was on the plate that use to hold the dome antenna for satellite communications. It was right on the back of the cab, in the middle, level with the roof. First check was 15:1. A couple of turns of the tuning ring and it dialed in at 1.4:1 on 19, 1.9:1 on 40 and 1.2 on 1. Couldn't get it any better than that. Just goes to show, where you mount your antenna and how, makes a big difference! I was surprised it tuned that well. 150 - ProComm 15 Inch Rubber CB Antenna
     
    Last edited: Oct 17, 2023
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  3. Ridgeline

    Ridgeline Road Train Member

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    I bet when it is checked against a Field Strength Meter, it will show that the antenna is a little short on performance.

    SWR isn't all that needs to be concerned about, anything under 2:1 is good, 1.5:1 is great.

    Who would use a Cascadia for a toter?
     
  4. Night Stalker10

    Night Stalker10 Road Train Member

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    Same principle as rubber antennas on a hand held radio. Okay SWR, but performance suffers greatly compared to a longer antenna.
     
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  5. mike5511

    mike5511 Road Train Member

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    I bet you are right, but he just wanted it to work. He's not a CBer, but people always comment about our rigs going down the highways (I ain't gonna say "and byways". What's wrong with using a Cascadia for a toter? Most are Volvos because of the Ishift (a lot of the folks never drove a Class 8 truck before getting their toter) and their sharp turning radius, not to mention used ones are plentiful these days. 393447095_10224618703799019_384186150016782302_n.jpeg But, we had about every thing at the Rally from new Petes to old W900s, mostly Volvos though. (The photo makes the sleepers look a lot longer than they are. It is a pretty wide shot. Guess the photographer didn't make the right adjustments.)
     
    Last edited: Oct 18, 2023
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  6. Vampire

    Vampire Medium Load Member

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    Nice!! You’re right, some of the trucks look distorted. Either way, looks like everyone was having a ball.
     
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  7. Ridgeline

    Ridgeline Road Train Member

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    cascadia isn't my first choice, Mack/Volvo. The toter I had was a KW, it was nice but a rattle can, not a chance.
     
  8. mike5511

    mike5511 Road Train Member

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    I put a lot of miles on a Cascadia and you are correct! My Volvo is the quietist truck I've ever driven, even better than the newer KW T680.
     
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  9. jdchet

    jdchet Medium Load Member

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    Until you crack
    Until you crack the window! Every Volvo I have driven was God awful noisy with the window open. The last Cascadia(2019) I drove wasn't nearly as bad! It's probably due to all the aero crap on our Volvo mirrors and the fact Volvo mirrors are way bigger than a Cascadia's.
    The 2023 Volvo I drive now was way easier to get the antenna dialed in than the Cascadia! Didn't have to add any ground straps on the Volvo. Had a whole bunch on the Cascadia!
    I did put the RigExpert on the stock Cascadia antenna and the numbers weren't horrible. It didn't work worth a #### either.

    JD
     
  10. mike5511

    mike5511 Road Train Member

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    I've seen perfect SWR on the stock Cascadia antenna, even the one that is hidden in the roof. But they won't get out much more than a 1/2 mile. I always reasoned is was sorry coax and the multiplexer that lost all the signal before it ever got to the antenna.
     
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