Inconsistent range

Ain't got much but it is possible to run new coax without removing the old coax. Just leave the old coax hanging in place and when you leave the company simply re-connect the old coax

 

Please elaborate on " I did calibrate it per instruction manual" , I have come across drivers before that are under the assumption that when they " calibrate" the antenna is tuned. The calibration process only allows one to then check swr and further adjustments are made to the length of the antenna based on swr readings, I know this is basic swr 101 but you would be surprised how many drivers think that the swr is set by the radio.

 

Here is what you need to do.

Find someone who has an antenna analyzer and have them check out the antenna.

If there is an issue, stop trying to tune it and replace the coax, don't pull the old one out, chances are it is part of the am/fm system. Put a new one in and check the system with the antenna analyzer.

 

Thanks Ridge, Im trying to keep it simple, but dont see the swr reading in either thread, just wondering if he switches button to swr after calibration and see where it reads on the meter, thats all Im asking, GO BLUE! Too little too late.

 

Just don't let the experts at the radio shop try to "improve" what the factory provided in its radio. It doesn't need any improvements, especially the type that most hometown experts try to perform. The likely results would be just the opposite.

 

To do a cal via the radio does nothing to tune antenna...Its just setting radio to see what swr readings are in different ch to decide how ant needs to be adjusted...Nothing more..
1st..Factory radio meters are not usually accurate(analyzers purpose but still has its flaws)just good as a guide..
2nd..swr reading should be as low as possible on all ch(1.5 or less)
3rd..If the cb shop is any good dont let them tune ant with people around or other trucks n such..Truck should be configured as if your driveing down the road(doors closed,trk n trl all straight lined)
4th....With an analyzer he should be testing for more than swr(1.5 or less)..There is resistance which should be 50 ohms on one ant or 75 ohm with two ant,depending on your set up a specific coax is req..
Resonance..Should be on or within a cpl points of zero...
If either resonance or resistance is off then there is an issue somewhere,the shop should be able to suggest a fix..
If possible to run your own coax with one antenna, thats the way to go..
Let us know what shop says and we will all chip in with some more help..

My last ant tune pic..

 

What kind of truck is it?


One of the main problems with factory coax is the connector where it connects to the radio. It's usually cheap solid wire coax and a cheap connector. Hit a few bumps in the road and it will be ok, hit a few more and it's bad again.

It's just junk.