[John Candle]

With your reception situation , you can not 'just drop' WLOS. A Tv antenna will receive the tv stations that are on further down in the list and the tv stations that are on further up the list. And if you are angling some how to get a antenna that only has enough strength to receive to just above WLOS --> It won't happen. You can not program out tv channels on and with tv antennas , tv antennas receive what ever is coming at them. And WMYA-DT 14 is far to strong at 4 miles away and a signal strength of 66.8 NM(dB) to try and use a small antenna and then try and make up the difference with a preamplifier , it won't work. With the DB4 in the attic you should be receiving more channels then you say you are receiving so something else must be happening here. Are there solar panels on the roof?? Is there radiant shield metal backed insulation in the attic?? Is there problems with the coax wiring - bad connections - bad or to many splitters or incorrect splitters?? I suggest take one long known to be good coax and connect to the DB4 with a known to be good matching transformer and then directly to the Tv. No splices , no splitters , no amplifiers. Go from the antenna and a known to be good matching transformer and the coax cable direct to the Tv. And why are you so ademant about no antenna on the roof??