My original post did not show up since I was not a member. I have been using a 60ft end-feed EMCOMM II at 10 feet off the ground with reasonable results. I was wondering if I experienced "blackout", would changing my antenna profile fix this? Maybe lower or raise it or add a ground counterpoise. I was going to try an MFJ 40/80m dipole at the same height and then try it as an inverted V with 20ft at feed point and 10ft on each end. Or the only other thing to try would be change band to 80m if on 40m. Not sure how much experimentation would help in a situation like the one described.