JIMMIE wrote in
:

....

Owen, didn't you write a paper on stacking antennas.

Jimmie

Jimmie, I did write a paper on optimum stacking distance for DL6WU long
Yagis, but that is quite a different situation to that in which Chuck finds
himself.

Your comment about the coax is valid, and all elements should be checked.

I might also add Chuck, that some folk have described minimum VSWR being
shifted, and attributed it to faulty ceramic caps in the network at the
base of the antenna.

But first, does it behave properly when mounted in the clear. If so, it
probably isn't faulty, but its environment the likely cause.

Owen