TT: I found a large reference, (>800 pages, .pdf) from the Military about grounding...pretty comprehensive... http://www.afspc.af.mil/shared/media/document/AFD-061120-007.pdf 73, DX, de Pat AA6EG aa6eg at hotmail.com; Skype: Sparky599 Moon or Bust!--Jamesburg Gang Rides Again!