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Author Topic: CB setup and SWR readings  (Read 719 times)

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Offline Eagle Jeeper

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CB setup and SWR readings
« on: February 04, 2010, 09:41:07 PM »
I have a mag mount whip style antenna and the CB temp. mounted in the truck with cig lighter adapter.  I hooked up the SWR meter and the readings are in the 8-9 range on both 1 and 40.  I think its the fault of the antenna.  My question is, is the mag mount self grounding and if so any ideas why readings are so high.
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94 YJj7, AMC360,T176,Dana300(twin stick, Dana 44 4:56, 14 bolt FF welded 4:56, 2 1/2" susp SOA, 38/12.5/15 TSL's, warn 8274,  Custom dash

Offline FiEND

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Re: CB setup and SWR readings
« Reply #1 on: February 05, 2010, 01:47:41 PM »
magmounts don't ground to the vehicle.  this is not to be confuses with 'ground plane' if that's what you are thinking.

make sure you aren't trying to do this in the garage, it has to be done out in the open.  but 8-9 is high no matter where you are.  will need a better antenna or coax or both.

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'97 TJ [sold]
'17 JK Rubicon

Offline Zombie

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  • Jeff the Zombie Jeep
Re: CB setup and SWR readings
« Reply #2 on: February 05, 2010, 02:59:12 PM »
*****warning, noob question******

what is a SWR meter and I would assume the readings would be something to do with reception?
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97 Red XJ, 4.5", 31" mud's, ARB front, 9500lb winch, bushwhacker's, warn sliders, HnT SYE and CV drive shaft - written off and sold for parts :(

Offline Eagle Jeeper

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Re: CB setup and SWR readings
« Reply #3 on: February 05, 2010, 04:08:33 PM »
http://www.rightchannelradios.com/pages/cb-antenna-tuning-and-swr-explained-pv-c0-58.html

Check out this link it explains it pretty well.  The more I read about it the more I realize you shouldn't run your CB until you tune your antenna.  If the SWR reading is too high you will fry your CB :(
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94 YJj7, AMC360,T176,Dana300(twin stick, Dana 44 4:56, 14 bolt FF welded 4:56, 2 1/2" susp SOA, 38/12.5/15 TSL's, warn 8274,  Custom dash

Offline OffRoadNewbie

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Re: CB setup and SWR readings
« Reply #4 on: February 05, 2010, 06:46:44 PM »
does anyone have an SWR meter that is going on the open run tommorrow if so could you bring it as i need some tuning as well

Ill buy you a TIMMYS coffee   :P
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2006 TJ its Green !! ;)
With A BIG dent in the door......
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