i mounted an older combo in my attic, near G.R., 8, 13 ,17, 41, with aliittle tweaking at 90-100 , 3, 35(uhf), got worse the more i tweaked lost at 70 or so and could'nt get them above it. I tried an amb and that killed every thing. 35 is about 10 miles, 3 is like 46... any way I added an...