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Old 10-08-2011, 07:10 PM   #1
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a couple of cb related questions

so my old 4' firestik got torn off my jeep a couple months ago and i have already ordered a 3' firestik as a replacement. i got a medium duty spring and a tub mount for it. im wondering hot the hot/ground wires connect to my antenna with the spring. and also, what type of cable and connectors are in the swr jumper cable. (i am in a network cabling class and can build my own cables).
thanks in advance,
Thomas
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Old 10-08-2011, 08:53 PM   #2
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The cable you are speaking of is called coaxial cable. CB Radios & most AM/FM, SSB, two way type transmitters use 50 Ohm coaxial cable. The most common coax you will see for a standard bone stock CB setup is RG-58. The step up from that (which I highly recommend) is going with "RG-8X" (50 Ohm) coax. If you were to make your own cable, make a 12' long piece of coax & properly solder on two PL259 connectors. The reason for the 12' length is that with the velocity factor of RG-8X, 12' of RG-8X is equal to 1/4 of the wavelength of a 27 Mhz radio wave.

Actually, to save yourself some trouble & effort, if you have a truck stop anywhere near you, they have RG-8X jumpers already made up from a coupe of different brands. Sometimes RG-8X is refered as "Mini-8" on some packages.

Hope this helps.

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Old 10-08-2011, 08:58 PM   #3
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I will add that with the 3' Firestick & the medium spring, you will more than likely need to do a decent amount of trimming to the antenna to get your SWR down below 2.0:1, I really recommend keeping it below 1.5:1 to ensure you do not fry the final transistors in your CB transciever.
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Old 10-09-2011, 07:50 AM   #4
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thank you for the detailed response. i already have the antenna cable. i was talking about the swr jumper cable (for tuning the antenna) the firestik has a tuneable tip btw. so the connector i need is pl259?
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Old 10-09-2011, 01:15 PM   #5
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You will probably find the medium duty spring too flexible - do a bit of searching here and on JF and you'll find that most folks end up finding the HD spring to be the best. That's what I've got and I've never hit a branch and had the spring let the antenna swing enough to come back and hit the hard top, but it always flexes just enough to avoid damaging the antenna.
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Old 10-09-2011, 02:43 PM   #6
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Quote:
Originally Posted by TJe0454 View Post
thank you for the detailed response. i already have the antenna cable. i was talking about the swr jumper cable (for tuning the antenna) the firestik has a tuneable tip btw. so the connector i need is pl259?
Yes, it would need PL259 connectors. Your Jumper should also be the same type of coax that you are using to go to your antenna. Typically, a 3' jumper of RG-8X is sufficient for tying in your SWR meter

I will second Commodore Dude's recommendation to run the "HD" spring. You can pick a good one up for a decent price at Radio Shack.
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Old 10-09-2011, 10:39 PM   #7
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just looked at the package for the spring. turns out it is HD
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Old 10-10-2011, 11:44 AM   #8
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just looked at the package for the spring. turns out it is HD
Awesome

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