Yep, that log periodic triple stack at Ft Bragg is quite nice.
I know the guy who designed and helped install it - Jay at
Array Solutions. I use his StackMatch torroidal phasing
system for my 6M stack.
BTW, pictured below is the "conservative" JJ homebrew log
periodic stack over here. I sometimes wonder if I shuda did
a Ft Bragg type triple sometimes...
T
K1JJ Logs, 100'/60' high - Top Log: 12-33mhz, 60' boom,
400 pounds. Bottom Log: 12-18Mhz, same as above but
1/2 completed.