one option to try once you get that new antenna is to aim it towards the tower for 21. ABC should be strong enough to be picked up on the back side of it. I know with mine aimed at the distant station I get NBC fine on the backside (180 degrees off) very well. (they use RF11 as the channel)
by the way here is my antenna setup
http://www.satelliteguys.us/digital-over-air-ota/250210-my-antenna-has-buddy-now.html
by the way here is my antenna setup
http://www.satelliteguys.us/digital-over-air-ota/250210-my-antenna-has-buddy-now.html