i moved my antenna about 5 feet up in the air. i use to get wmc at around 80%. now it is at 93%. i have never gotten whbq at all,it is now staying in at 60%. the others i want are wreg and wlmt. wlmt will come in at 65% and drop down to about 50%,stay out for about and hour and do the same thing over and over. my tv fool report TV Fool. now my question is will a pre-amp help me?