Keep us posted on the results xilbus... Thinking of trying a Kiztech KT-200 here... I'm not getting (nor did I EVER get) any US channels, even late at night, scanning degree by degree... I have a newer CM-7778 and while I get all locals perfectly that is all. Everyone seems to have such ease to get PBS I have a clear LoS and decent elevation (30 feet). No idea why I can't get PBS or any US channels. Tear.
The ability to receive the US station varies a lot across the NCR. Those located in the south of the region (e.g. Barrhaven) and some in Aylmer find it relatively easy. Those in between less so :-(
A high-gain yagi and a low-noise pre-amp are usually needed, even for those in the better areas. Every dB of noise saved in a pre-amp is an extra dB of noise margin in the ATSC decoder, so pre-amps with less than 1 dB noise are the best choice. Unfortunately, the Channel Master amps do not fall into this category! The most preferred are the Research Communications amps from the UK, but these cost about $200 delivered. Second choice might be the Kirztech amps that claim less than about 0.5 dB noise. Less than $100 delivered. I use two stacked 91 XGs and a Kitztech 200, but with a noise margin of -21 dB for rf 23, I rarely see WNPI even in tropo events.
When comparing the results of two different amps, it needs to be done within minutes, as propagation quality can vary widely within just a hour as most reception of the US stations is mostly due to tropospheric refraction caused by cooling of the ground in the evening. Some evenings the signals are strong, the next evening they are non-existent.
It's good that so many are trying to get the US stations - it's helpful to learn what works in various locations and what doesn't.