Hi Laurence, That TACAMO source must have an impressive ERP because it was quite strong here too, on par with NAA and about like the -55 dBm you mentioned on my SpectraVue waterfall. Your grabber work has paid off. It really looks great. Good luck decoding Bob, WE6XGR on Opera tonight. -- 73, Garry, K3SIW, EN52ta, Elgin, IL