Cannot Tune Cobra 29 NW LTD Classic

What kind of truck are you putting it on? Are the new antenna and the new coax on the factory mount? One possibility is that the mount isn't properly grounded.

 

You need to trim the stinger down about .5" then recheck it.
If you can get "the radio" to show under 2 your in decent shape.
You need an SWR Meter to bring it down further.

 

Your radio has nothing to do with the Standing Wave of your antenna......

If your running the factory coax, dont....change it out with some good coax....dont go to a truck stop
and get any of that junk either find a ch shop and get some Beldon RG8.....you do need a external
swr meter to set your SWR (there is only 1 standing wave no shuch thing as SWRs lol) if you dont know
what you are doing it is probably best to have the shop that you get your coax from tune your antenna for
you.....someone can explain to you over the phone but like i said its just as easy to have the shop do it
if they will do it rite....that getting your SWR below 2 aint guna cut it.....if its grounded properly and you
have good coax and good antenna you should be able to get it to 1.3 or better and thats where you need
to be......if your ever down around East Texas ill show you what a perfectly tuned antenna with no
reflect will do....hahahaha all the locals know....just holla for DC

 

Put a LOWPASS filter on the radio to filter out trash if the SWR goes down your radio is spuing put garbarge a common problem after the radio hacks get done with a good radio.

you can see some of my filters on good radios.

 

IF THE RADIO IS SPUING OUT TRASH IT WILL READ IT AS A HIGH SWR

Try a filter borrow one and if the SWR goes down thats thew problem ....

 

how is the radios tune job guna affect the standing wave of the antenna?

a radio isnt going to spew trash with just a carrier.....if your talking into your radio
while checking the standing wave then yes it can afect the reading you get but....
you arent supposed to modulate while checking reflect of the antenna just a carrier

 

ASUMING ....

The antenna shows a better match on a stock radio .....

This problem has been hashed out before IF you have a ground at the antenna ande a 2nd radio shows a good match your radio is spuing out trash which the antenna shows as a high SWR.

This is why I recemended a low pass filter since it will make shure your radio is clean ...... NO TRASH ....

Try another radio if you get the change in SWr then supect a badly tuned radio if not then recheck your antenna ...

In the photo you can see one of my filters upper right next to weather station display.

 

I realize this post is old, but it still a bunch of crap. SWR has to do with frequency resonance not garbage generated by the radio.

Could be bad grounds, open or shorted coax, ant mount, or poorly installed connectors. Just because this poster is a Amature does not mean he knows what he talking about, thats why they dont call them professionals.

And yes I have a class a, and a NABER Cert, and a extra class.