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Thread: CB Myths

  1. #31
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    Default Re: CB Myths

    First of all I want to thank you all again for the help setting up my cb. Today I got a little tired of listening to old TV reruns on my cat antenna, so I took it off my rack, got a Firestick and Cobra 25. Now my swr on ch 1 is 1.2 , and ch 40 is 1.3. Now I'm happy!

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    Default Re: CB Myths

    Okay, not so happy. when I put the cover back on the end of the firestick the numbers change. No matter how carefull I am not to twist the cover, ch 40 goes up on the meter. Any ideas as to why this is happening? I've been at this for a few days now and put the other antenna back on. It reads 1.3 - 1.7 and seems to work okay.

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    Default Re: CB Myths

    Quote Originally Posted by WAS95X View Post
    Okay, not so happy. when I put the cover back on the end of the firestick the numbers change. No matter how carefull I am not to twist the cover, ch 40 goes up on the meter. Any ideas as to why this is happening? I've been at this for a few days now and put the other antenna back on. It reads 1.3 - 1.7 and seems to work okay.
    That's strange isn't the cover plastic?

  4. #34
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    Default Re: CB Myths

    Yes it is, it reminds me of what you'd dip tool handles in. I've given the screw a 1/4 turn (and variations) in, before putting the cap back on. I don't know how many times that I've readjusted the screw, but the cap seems to make a difference. The other antenna had to be tuned by trimming the wire and there were no changes when I put the cap back on.

  5. #35
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    Default Re: CB Myths

    Yes the cap makes a difference and in one of my Radio Comm Tech tips I mention this and that lubing the cap may be helpful as you will have to take it on and off multiple times. 1.3-1.7 is fine, go with it and be happy.
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    Default Re: CB Myths

    Quote Originally Posted by prerunner1982 View Post
    Yes the cap makes a difference and in one of my Radio Comm Tech tips I mention this and that lubing the cap may be helpful as you will have to take it on and off multiple times. 1.3-1.7 is fine, go with it and be happy.
    Thank you! Is there a link or some way I can see/read those tips?

  7. #37
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    Default Re: CB Myths

    I have posted some in the CB section and have segments on the Jeep Talk Show.

    My tips:
    1. Make sure the antenna mount has a good clean metal to metal contact with the body.
    2. Where the coax attaches to the underside of the mount, make sure it has good clean metal to metal contact there. (Powder coated mounts are a waste of time and money)
    3. Get the antenna as high as possible and/or run the longest antenna you can.
    4. Check SWRs.
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  8. #38
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    Default Re: CB Myths

    Thank you very much! It looks like I have some reading to do.

  9. #39
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    Default Re: CB Myths

    As far as why the cap makes a difference, though it's not a conductive material it still changes the characteristics of the antenna, likely changes the impedance slightly. When testing/tuning an antenna you want to do so with the antenna set up just as you were going to use it, in this case with the cap on.

    If you tested/tuned your antenna on a front fender lip mount and then moved it to the rear above the taillight it would require re-tuning because the characteristics/surroundings changed.

    This becomes fun in the ham radio world where antennas can be 10-100s of feet in the air. If you test an antenna 5' off the ground and then move it to 30' the readings will be different as it is in a different relation to the ground, trees, your house, etc.
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    Default Re: CB Myths




  11. #41
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    Default Re: CB Myths

    A light coat of common hairspray will help keep the tip in place?? It helps on windy days too.
    I picture in my mind a pile of dead bugs and leaves stuck to an antenna.
    One more part and I'll have a new Jeep

  12. #42
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    Default Re: CB Myths

    I don't think spraying the entire antenna is necessary. Only the tip will do. (Spray it inside the cap)
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    Default Re: CB Myths

    Quote Originally Posted by prerunner1982 View Post
    Only the tip will do. (Spray it inside the cap)
    That's what she said!

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    Default Re: CB Myths

    I took the antenna mount off and started over. Cleaned off the paint where the mount goes and put it back. Cut off about 10' of coax and about 8" more wire off the antenna. I'm at 1.3 - 1.8. I went for a ride and was able to hear someone on most of the channels I tried, nothing that I wanted to listen to though. I'll go through the archives and see what more I can learn. Thanks!

  15. #45
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    Default Re: CB Myths

    Quote Originally Posted by Mudderoy View Post


    Yeah... careful with some of their facts. They also claim that you NEED 18' of coax and not to coil your coax.
    1993 2 door 4x4 4.0 5 speed
    1997 4 door 4x2 4.0 auto RIP 6/6/2016
    2000 4 door 4x2 4.0 auto


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