I have a DB2 HDTV antenna in my attic. I use it to send OTA signals to my DISH 722 receivers. Yesterday my signals dropped from 100% down to the mid 60s. I have two signal amplifiers in the house. One is a pre amp at the antenna. When I unhook them I lose signal completely which tells me they are working at least partially. We have had some electrical storms in the last few days. Any ideas?