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Unread 04-13-2014, 08:05 PM   #1
jrskihog
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1998 TJ Wrangler 
 
Join Date: Sep 2011
Location: Mt. Pocono/Scranton, PA
Posts: 76
Cb tuning

I was trying to tune my cb and 1st how important is it to be in an open area as I don't have an area with at least 50 feet with no obstructions. 2nd every time I put the meter to set and key up on Chanel 1 and turn the calibration knob to get it to set and then change the switch to rec I seem to keep getting different readings. Sometimes it's 1.1 and other times it's 1.7. When I go to channel 40 and I have the meter in fwd and key up I have a difficult time getting it to the set point. The needle starts to move up and the goes full scale and if I turn the calibration knob more it goes all the way to 0 and then to 3 and then full scale. I can usually get it to the set point or close to it. Then when I flip forward to rec I get a reading of 1.8 sometimes but most of the time I get a reading of around 2.5. I removed the antenna and checked the for a clean surface for good contact for ground and resanded just to make sure. Is there something I am missing? I feel that the output reading should be contestant. I have a cobra 75wx cb and a 4ft fire stick II with a 3" spring.

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Unread 04-13-2014, 08:08 PM   #2
Jerry Bransford
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First, just do all of your antenna tuning on ch 20. When it is at minimum SWR on 20 it will be as good as it'll get on 1 & 40 too.

Check the antenna mount's ground connection, it is critical to obtaining the lowest possible SWR. Are you using Firestik's Firering or conventional mount? Also, springs can make tuning an antenna more difficult in several ways, the least of which the spring makes the antenna electrically longer than can sometimes be tuned for.
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Unread 04-13-2014, 08:23 PM   #3
jrskihog
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1998 TJ Wrangler 
 
Join Date: Sep 2011
Location: Mt. Pocono/Scranton, PA
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Thanks jerry
I am using the Arizona rocky road antenna mount fora single antenna. http://www.arizonarockyroad.com/antennamounts.html
I also checked channel 20 and had a difficult time getting to get like channel 40 and it was around 2.1 iirc. I have also heard about the spring being a problem also.

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Unread 04-13-2014, 08:46 PM   #4
Jerry Bransford
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There is no detail on that page, photos of what the antenna is threaded into would help. I suspect your mount is inadequately grounded, the part attached to the Jeep requires a bare metal to bare metal connection.
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