> My question is grounding the outer shield to the tower a good
> practice?
Most definately. There should be a ground kit at the top of the run ABOVE
the hoisting grip (if one is used), one at the bottom of the run before it
makes a horizontal bend, and at the entrance bus bar. If the cable is
longer than 200' there will be additional hosting grips along the length
(typically at no more than 200' intervals), and there should be a ground kit
about 10' ABOVE each hoisting grip.
> Also any other suggestions as to where to look for this problem.
What kind of duplexer are you using? If it is a type that doesn't provide a
DC short through the coupling loops, you might want to add a shorted
quarterwave stub before your existing gas discharge tube arrestor.
--- Jeff WN3A
