SWR problems, mobile.

[fourstringburn]

I was going to but I tried the beads and they worked so I stopped at that. Monday I have some time and I am going to put in a longer coax between my amp and radio, 9ft. lone at this time it is 2 ft. long, then I will check everything....but I will remove the beads and try the coil at some point in the re workings....Right now its rocken...If I can get it better I will.

Sounds like it is working well! It takes about 6 ft. of extra coax to make 7 turns if you were considering doing that so 9 ft. should be just fine.

Here is my mobile setup. If you look a little off to the right below the antenna base, you can see the coax coil with 3/4 in. ferrite bead with the skinny side facing you.

This is primarily for CMC suppression since I already have a UNUN transformer matching network at the antenna feed point. That's the box you kind of can see mounted further to the right.

 

[Onelasttime]

First have you checked the radio and amplifier seperatly for issues? Have you checked each jumper and the final run of coax on a your VOM? Have you checked the antenna and all mounts and stud's? It only takes one intermittent continuity issue to ruin your day. I have seen hardline migration issues where the foam insulator versus center conductor have shifted or melted or just broken down over time. The problem was intermittent or only occurred with one piece of coax. The problem was not obvious issue just caused a small bump in SWR that could not be explained. The devil is int he details something has changed either with your set up or the measuring equipment you are using. Have you checked this reading with someone else measuring equipment or have you tested your equipment to make sure it is operating correctly?

I do not do keydown stuff so I have no idea how fighting sticks are made but all antenna have potential trouble spots internally especially where anything is grounded or insulated from another part. Any spot to parts meet is again another potential trouble spot.

I hope my post makes you think about something minor you might be over looking.

 

[Mudduckmobile]

Sounds like it is working well! It takes about 6 ft. of extra coax to make 7 turns if you were considering doing that so 9 ft. should be just fine.

Here is my mobile setup. If you look a little off to the right below the antenna base, you can see the coax coil with 3/4 in. ferrite bead with the skinny side facing you.

This is primarily for CMC suppression since I already have a UNUN transformer matching network at the antenna feed point. That's the box you kind of can see mounted further to the right.

Very nice. I can see your coil. I had a quick trip over the Central Cascade Mountains this morning, round trip about 275 miles. Up in the deep mountains only about 4,815 ft. but did hear some SoCal. and AZ. with a bit of Col. in there. Got good QSO mobile lsb 38 with San Jose, Cal. when going west bound, and got a QSO with a T.J. station when east bound mobile. I was told by both I was 59, and I had them 38, and 48. I think I may just leave all as is for now. .555 usb was dead, and I was hearing some odd sounds, like back scatter but in the form of a harmonic....

First have you checked the radio and amplifier seperatly for issues? Have you checked each jumper and the final run of coax on a your VOM? Have you checked the antenna and all mounts and stud's? It only takes one intermittent continuity issue to ruin your day. I have seen hardline migration issues where the foam insulator versus center conductor have shifted or melted or just broken down over time. The problem was intermittent or only occurred with one piece of coax. The problem was not obvious issue just caused a small bump in SWR that could not be explained. The devil is int he details something has changed either with your set up or the measuring equipment you are using. Have you checked this reading with someone else measuring equipment or have you tested your equipment to make sure it is operating correctly?

I do not do keydown stuff so I have no idea how fighting sticks are made but all antenna have potential trouble spots internally especially where anything is grounded or insulated from another part. Any spot to parts meet is again another potential trouble spot.

I hope my post makes you think about something minor you might be over looking.

 

[Mudduckmobile]

First have you checked the radio and amplifier seperatly for issues? Have you checked each jumper and the final run of coax on a your VOM? Have you checked the antenna and all mounts and stud's? It only takes one intermittent continuity issue to ruin your day. I have seen hardline migration issues where the foam insulator versus center conductor have shifted or melted or just broken down over time. The problem was intermittent or only occurred with one piece of coax. The problem was not obvious issue just caused a small bump in SWR that could not be explained. The devil is int he details something has changed either with your set up or the measuring equipment you are using. Have you checked this reading with someone else measuring equipment or have you tested your equipment to make sure it is operating correctly?

I do not do keydown stuff so I have no idea how fighting sticks are made but all antenna have potential trouble spots internally especially where anything is grounded or insulated from another part. Any spot to parts meet is again another potential trouble spot.

I hope my post makes you think about something minor you might be over looking.

Thank you for your in put! And yes all test equipment was checked, and 2 other sets of test equipment was brought in as well, all equipment gave the same results.
All of my problems started with a melted coax connector.... All is now fixed, and all bonding prob's fixed as well. 73