I live in Northeastern Pa. This morning after watching Channel 28 WBRE news I installed a Blonder Tongue preamp Vaulter III on the Channel master uhf antenna I have positioned at about 50' in elevation, with hope of getting additional stations. After re-erecting the antenna I discovered I had lost Channel 28 but had gained 7 other channels in the UHF band. I called the station to see if they had dropped the broadcast, they were still up. I've tinkered with the antenna, looked at the map for the antenna transmitter tower locations relative to my address at 18248 to point the antenna precisely, with no luck. Does anyone have an idea why I can not receive that station after the preamp install?