I know it's been a while since I started this post, we finally got around to checking all the traps on the antenna. All the traps were installed where they should be. The SWR still remained the same, OK on 10 meters, off the charts on 15 and 20.
Resonate on 18 where it shouldn't be. Here is what happened next........ I decided to turn the antenna while watching the SWR on the analyzer to see if any directional change in the antenna due to twisting coax would change the SWR.
Unbelievably what I noticed was just as I hit the brake switch on the rotor controller the SWR jumped even higher. Every time I hit the brake switch the SWR would jump all over the place.
With repeated pressing of the rotor brake switch I was able to get the SWR back to normal on all bands.
Now.............. after all this messing around with the traps I now have found that the problem is some how related to the rotor brake, I would guess as short?
?, the brake is feeding voltage into the tower and or possible faking the SWR analyzer into a false reading. By repeated hits on the brake switch I'm able to get the SWR back to normal. But there is more........ If I bump the brake switch to where I get a high SWR reading I can turn off the rotor and even unplug the controller and the SWR still remains in the high state, I can't figure that out. I can turn the control box back on, bump the brake switch a few times and get the SWR back to normal. This has really got me stumped. This is an old CDE rotor.
Does anyone have any ideas as to what might be happening here??