Replaced Every Part, Still, Random High SWR

You need to have a tech look at it. As to "Why would it then change back to low readings ALSO without me changing anything?", this could be an intermittent connection. You could between setups be consistently putting the mirror mount stud together wrong. Nothing but the stud underneath. On top plastic washer first, then any washers and the nut the antenna screws into. I have seen these assembled wrong in their new packages and I have seen people think this is correct and from then on assembling it wrong. Without a close inspection no one can help via online other than guess until you get it right. This is why an experienced eye is useful.

 

"So - worring about if your radio puts out 5 watts or 4 watts or paying someone money to peek and tune your radio so it puts out say 12 watts - doesn't amount to a hill of beans in the long run.
All it really does is wear out the radio sooner."

20 million drivers are wondering if you have lost your IQ. I think, therefore I am. However, you are not.

 

I agree with the mount problem, I see the nylon washers installed wrong all the time, or loose.

 

I'm inclined to agree with the earlier possible diagnosis that you're checking your SWR under optimal conditions, such as being well away from any buildings, trees, power lines, and other vehicles. As stated, when you get near other objects, the radio waves bounce back and would cause observed SWR to be higher. So if no one was parked near you last night while using your CB, you'd have no problem. But if you woke up and were suddenly surrounded, that might be your issue.

But I'm curious, what SWR meter are you using? The one built into the radio? I'm far from being an expert, but from what I've read in other posts, many people don't believe the SWR meters built into CBs are accurate or reliable. If this is the case, I'd look into picking up a separate meter and a short length of coax to use as a jumper to install the meter in line to double check yourself.

 

AGREED, your doors should be closed as well, eliminate the easy stuff first.

 

For a few years, I fought changing swr issues. I finally gave up and walked into the truck stop, purchased a single phased coax and eliminated 1 of the antennas from the system.

Now I have a small dead spot in my transmission pattern due to the trailer but it is mostly only short range. Meaning less then 1/4 mile. Kind of like a blind spot that you get from mirrors etc.

Been running single phased now for a little over 6 months and no issues with changing swr.

 

Funny, with out my 450 in the loop my 29 would hit guys at about 5 or 6 from 15 miles away. I flip on the 450 and it buries their needles in their radios.

Talk about line of sight. LOL On 100 watts I have talked to a guy that was 30 miles away. There was a big hill between us and he was in the bottom of a gravel pit.


So guys, don't listen to this channel jumper fool. he is just a resident troll that comes in here once every few months to stir the pot.

 

And your explaining this to who???????

 

"Let me explain this to you - so you can understand."

When the blind lead the blind both fall in the ditch. Or better still, a fool is known by a multitude of words. There is nothing you can teach me since I have forgotten more than you will ever know. If you had one hundredth of the smarts you try to impress people with you would have known radio waves at Hf and lower frequencies actually bend around the earth meaning CB is not limited to line of sight. This bending is less than the first possible hop from skip based upon the radiation angle. You spew so many useless words you should be sending money to the site owners to offset some of the server space cost you endlessly waste spewing your babble. I am quite frankly amazed they allow the internet in rubber rooms.

I get the feeling you will next be telling us CB will not go far because of all the little gnomes catching the waves.