[TowerTalk] TH-7DX , traps, etc

[Mike Bragassa]

Heavy on the "etc":

Seems I did not mention the balun that was on the TH-7 prior (keyword). As a test I put a different balun in place of the one I had on it. That was the problem, it appears, as VSWR is at/below 2:1 on all bands, particularly 10m which was thought to be a problem. Nice dips across the spectrum where they are supposed to be, etc. I had the extra balun handy or I was going to, and may still, 'roll-my-own'' choke. 

The traps had been completely cleaned/inspected prior to the final tests.  Another suggestion for ground-testing, and I had forgotten it, is to hoist the antenna up vertical with the reflector at least 5 feet off the ground. If the balun test above had failed, I was going to do this next. There also was another trap testing tip using an Autek RF Analyst and checking impedance across the ungrounded end of the trap cover and the element. Thanks!

Many thanks to all who responded.

Case closed!

73, Mike Bragassa, K5UO