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Thread: CB in '99 XJ

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    Default CB in '99 XJ

    I decided to mount my Amazon special Midland CB in the XJ. I went with the Firestik mount and a 3' Firestik top-loaded whip.

    Since I already installed my ham radio, mounting options were even more limited than before I put it in. The glove box seemed like the best option. When I save up some toy money, I plan on getting a Cobra 75 compact unit.



    The antenna mount seems rather stout and looks nice to boot. I got the SWR to a respectable 1.2:1 on ch 20 and it seems to really outperform my previous antenna, a Lil' Wil.



    I used a uni-bit to drill the hole for the coax and routed it to the front hidden under the trim. I'm pleased with my handywork.


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    Default Re: CB in '99 XJ

    nice job .........
    keeping it red........

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    Default Re: CB in '99 XJ

    very clean install

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    Default Re: CB in '99 XJ

    well done,
    '91 XJ Limited | 4.0 H.O. I6 | AW-4 | NP242J | D30 | C8.25 | BFG KM2 33x10.50x15 | front winch bumper ...

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    Default Re: CB in '99 XJ

    I love the design of the firestik stud connector just wish they would stop using that crappy rg58 and start using mini 8 cable

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    Default Re: CB in '99 XJ

    Nice install.

    I wouldn't worry about spending any more money on a "fancier" CB unit none of the expensive ones really offer any big advantage over the cheaper units. It just a CB after all and pushes the same power whether it costs 200 dollars or 40.
    1995 XJ / 4.0L / AW4 / D30 w/No-Slip Locker / C8.25 / UPCOUNTRY spec suspension / 235/75R15

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    Default Re: CB in '99 XJ

    Quote Originally Posted by downsy View Post
    Nice install.

    I wouldn't worry about spending any more money on a "fancier" CB unit none of the expensive ones really offer any big advantage over the cheaper units. It just a CB after all and pushes the same power whether it costs 200 dollars or 40.
    EXACTLY! and if it gets messed up while offroading you are out 40....

    and besides the antenna is more important for good communication.
    Last edited by prerunner1982; 12-17-2014 at 05:20 PM.
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    Default Re: CB in '99 XJ

    That looks like a good place to install the CB as any... I had mine installed where you put your Ham... Granted mine was a bit larger CB... Going to pick up the Cobra 75 for my 97.. was just stuck on the ant... but might have to look into that setup you are running... I had the same mount on my 98 with a 4" Firestick, just never managed to get it tuned correctly... but that might have had to do with the excessive length of COAX
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    Default Re: CB in '99 XJ

    Quote Originally Posted by bluedragon436 View Post
    but that might have had to do with the excessive length of COAX
    Negative.

    You can "Tune" the SWR by changing the length of the coax but you are just tricking the SWR meter, the antenna isn't any more efficient as the SWR at antenna didnt change.

    You tune an antenna by changing it's length, when you get a reading above 1:1 on the SWR meter some energy is being sent back down the coax and it is basically trying to radiate signal. When you change the length of the coax you are tuning the coax as an antenna. You need to tune the antenna to lower the SWR not tune the coax.

    Did I lose you there?
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    Default Re: CB in '99 XJ

    No that makes sense... I was thinking it might have been partially either the excessive length or with that length the chances of any of it being damaged.. the damages to the coax, I know could cause issues... I picked up signals just fine and got messages amazingly clear... just very rarely ever was able to transmit out and get a reply...
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    Default Re: CB in '99 XJ

    Excessively long runs of coax can cause signal loss though, but not really an issue in a vehicle.

    Damaged coax can certainly cause issues though.
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    Default Re: CB in '99 XJ

    Quote Originally Posted by prerunner1982 View Post
    Excessively long runs of coax can cause signal loss though, but not really an issue in a vehicle.

    Damaged coax can certainly cause issues though.
    Either way it all went with the 98... so starting from scratch this time around.. so hopefully won't be an issue.. debating about doing another hard mount or doing a mag mount.. but will see what I can find deal wise.. Def want to put something in there.. been thinking about picking up either the Cobra 75 or another similar all in one unit, so I can move it over to my Ram when I take it on the road w/ a mag mount.. that way I can talk to or listen to the truckers (the few that are still using CB's that is) when I make trips with it...
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    Default Re: CB in '99 XJ

    One of the biggest things you can screw up your antenna and your match is not having your coax around properly get it near too many power leads you going to end up screwing up your SWRs. But the other thing is also running the wrong kind of cable that rg58 is garbage you need run Mini 8 coax it'll run a lot better

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    Default Re: CB in '99 XJ

    Quote Originally Posted by DEAD EYE View Post
    One of the biggest things you can screw up your antenna and your match is not having your coax around properly get it near too many power leads you going to end up screwing up your SWRs. But the other thing is also running the wrong kind of cable that rg58 is garbage you need run Mini 8 coax it'll run a lot better
    in a long run perhaps but in a short vehicular type run the difference in loss in negligible.

    From the charts I have seen the difference in loss is about .5db - .8db at 100ft.
    What would the loss be at 18' (since that it was is normally used)? Figure 20' is 20% of 100' so 20% of .8db is .16db.

    With only 4 watts in the loss is all of about .25watts?

    Not saying it's isn't a better cable, but for a short run on a weekend/monthly user for trails comms it's not likely to be worth the time/cost.

    Would make routing the cable a bit easier though.
    Last edited by prerunner1982; 12-18-2014 at 10:38 AM.
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    Default Re: CB in '99 XJ

    Quote Originally Posted by prerunner1982 View Post
    in a long run perhaps but in a short vehicular type run the difference in loss in negligible.

    From the charts I have seen the difference in loss is about .5db - .8db at 100ft.
    What would the loss be at 18' (since that it was is normally used)? Figure 20' is 20% of 100' so 20% of .8db is .16db.

    With only 4 watts in the loss is all of about .25watts?

    Not saying it's isn't a better cable, but for a short run on a weekend/monthly user for trails comms it's not likely to be worth the time/cost.

    Would make routing the cable a bit easier though.
    Next to no difference between 58 and 8X for QRP. Even the loss on the receive side is minimal considering we're talking about HF.

    If 58 was garbage…it wouldn't be the standard for all public safety mobile installs.
    Last edited by xjzaped; 12-21-2014 at 04:17 PM.

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