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Thread: 102" whip antenna

  1. #11
    GLFWDA Member GLFWDA Member Greenway's Avatar
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    You want to mount it near a horizontal surface. It acts as the ground plane. Try to avoid vertical surfaces. They make the antenna weirdly directional and can raise your SWR

  2. #12

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    Quote Originally Posted by Greenway View Post
    You want to mount it near a horizontal surface. It acts as the ground plane. Try to avoid vertical surfaces. They make the antenna weirdly directional and can raise your SWR
    Ok, so I had it backwards lol!
    Maria: Can we ride in your Jeep again? Please!?
    Lily: My tooth feels loose, can you use your tools to pull it out again?
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  3. #13
    GLFWDA Member GLFWDA Member Greenway's Avatar
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    Quote Originally Posted by lgottler View Post
    Now, who has a swr meter really close to me?! New Baltimore.
    Do you ever make it up around Fenton?

  4. #14

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    Quote Originally Posted by Greenway View Post
    Do you ever make it up around Fenton?
    Everyone seems to live in or near Fenton. Last 4 parts I bought came within 10 miles. Let me try and get my jeep registered and insured again and then I might be up for a trip there!
    Maria: Can we ride in your Jeep again? Please!?
    Lily: My tooth feels loose, can you use your tools to pull it out again?
    Juliet: Can you carry me upside down to bed?!
    Violet: Cookie?

    My pics

  5. #15

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    Quote Originally Posted by lgottler View Post
    Everyone seems to live in or near Fenton. Last 4 parts I bought came within 10 miles. Let me try and get my jeep registered and insured again and then I might be up for a trip there!
    We can probably tune it pretty quickly if you have everything mounted correctly @ GG in the campground.
    j-kb8ymf

  6. #16

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    Good cuz my SWR meter died.
    KDSRGON GL#2665 KD8EGK
    Thanks to those that do all the hard work.

  7. #17

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    Quote Originally Posted by kb8ymf View Post
    We can probably tune it pretty quickly if you have everything mounted correctly @ GG in the campground.
    j-kb8ymf
    I didnt want to show up with a non working cb. It picks up the weather band, but didnt try anything else.
    Maria: Can we ride in your Jeep again? Please!?
    Lily: My tooth feels loose, can you use your tools to pull it out again?
    Juliet: Can you carry me upside down to bed?!
    Violet: Cookie?

    My pics

  8. #18

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    World of CB in Pt. Huron. Very good guy to work with. Know his stuff.

    http://www.topix.com/yp/port-huron-m...64-world-of-cb

  9. #19

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    Quote Originally Posted by kb8ymf View Post
    DON'T do it. Strapping the antenna down and curving it over the truck will make is as effective as a set of Dixie cups. The EMI (Electromagnetic Intereference) with the antenna that close to the body of the vehicle will effectively cancel out most of your transmitted watts. You radio puts out typically 4 watts. The rejected wattage with the antenna near the steel body will suck up probably 90% of that. You'll put out maybe a 0.25 of a watt if you're lucky. Leaving the antenna free to whip around is a huge danger to those around you when you're doing some slow rock crawling stuff.
    Antennas like wide open areas around it. Plus that antenna is NOT very forgiving when it comes to tuning it. To tune it you have to cut off the length to get it matched. What happenens if you cut to much off? I'll let you figure that out.

    I have a better solution. One I have used for years. And with still only putting out 4 watts, I'll challenge anyone to match the performance of my little radio.
    See the link below to what I have. Notice the tuning tip at the top. Completely adjustable up and down. The REAL secret is to tune the antenna to the radio properly. Here's where it gets interesting. Antenna's can only be tuned to ONE frequency or channel optimally. Channels on either side of that channel will degrade further and further SWR wise. Meaning if I tune my radio to a SWR (Standing Wave Ratio) of 1.1:1 on channel, it in theory would be transmitting all 4 of the watts out with nothing being consumed as heat. If you measured the SWR on adjacent channels You will find the SWR gets higher and higher the further you move from your set channel. The problem with a high SWR is that if you put out 4 watts with a high SWR, 3.5 watts of that is being rejected or used to create heat actually and NOT being used to communicate. So pick the channel you want to use most often and tune it to that channel. I wouldn't pick channels near the ends because you will have an extremely high SWR on the far reaching channels. Instead pick something near the middle. Channel 19 or 20 if you have a 40 channel or Channel 11 or 12 if you still have a 23 channel unit.
    The other thnig to remember, SWR of greater than 2:1 can be VERY distructive to your radio, Meaning too much output is being turned into heat which in turn can start to heat up the internals of the radio. It's one of the reasons big power radios blow out their final amplifiers because at very high output levels you have to be very careful.

    Get this antenna and match it properly and you won't be disappointed.

    http://www.k40antennas.com/products/...0-watts-black/
    haha, I hope you realized in my pic, that the antenna tuck is only for storage/getting in the garage.

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