Okay, I managed to install a pole/mast outside and have relocated my Terk HDTVo outside (approx 12ft from the ground). The signal consistency is 50% improved vs the attic installation. I still have some intermittent problems on 2-3 channels (4,5,8) but overall it was worth the effort. I can now watch WNPT (8.1 and 8.2) most of the time! Per your recommendation, I'm certain a larger antenna would improve the situation even more, but this may be acceptable for now as we're contemplating selling our house and moving closer to Nashville this summer.
Thanks so much for your assistance! Also, even with my antenna pointed N toward Nashville, I still managed to pick up WAAY-ABC in Huntsville with decent signal strength.
Take care.