I share a subscription with a friend who lives in Portland Oregon. He is the subscriber. I have had the Tivo receiver in Vancouver B.C. Canada for two years without any problems. I just moved to Red Deer Alberta which is 200 to 300 miles North of Montana. There was a question of whether or not the 18 inch dish would be good enough. Well I got every single transponder at 85% or better, but no matter what I do, the transpoders that give me local Portland channels don't get any signal at all. So my question is; will a bigger dish solve this issue? If the dish is too small then why is every other channel just fine? If anyone knows exactly what my problem is, then I would appreciate the help??