I live in St-Henri, just below "The Glen" tunnel from Westmount, in a third floor apartment with a balcony facing east, shaded a little bit to the south. To the left of the balcony is the Ville-Marie Expressway overpass, which looms over the neighborhood. Our balcony is right in front of our living room, where the TV and such are set up.
I thought it would be impossible to pull in HD channels without some serious work (which our landlord would definitely not allow - satellites have been already banned, so putting an anttenna on our roof is out) after I tried scanning the channels with out HDTV out of the box. Miraculously, I managed to pull in the WPTZ NBC HD channel (5.1 and the weather channel 5.2) in with $10 RCA rabbit ears from FutureShop, and on one occasion the CBC HD channel (on 6.1), but this was only for a couple of minutes. The WPTZ NBC HD channel came in all the time, but I could only get it at night, though, usually after 10 o'clock (on really clear nights I have gotten it as early as 8 PM). In the last three or four days, I haven't been able to pull it in at all (for what I presume is bad weather-related reasons). I managed to pull in the channels by hanging my rabbit ears off of a curtain rod facing the window of the balcony door. For whatever reason, it managed to pull the strongest signals there (the signals at its peak usually ranged from the low 50s to high 60s at the best, mid/high 30s to 40s at its worst, non peak times).
What I'm wondering is, would it be worth the investment to buy one of those $40 or $50 electric-boosted indoor antennas to try and pull in more of the channels? I saw one posted on here several months ago that looked like a miniature version of the old ariel antenna my parents had on a tower next to our house when I was a kid. I think it was a U.S. radio shack type deal. When I do a TV scan, the ATSC channels that the TV recognizes are UHF 14 (which it pulls in well on 5.1 and 5.2), 19, 20, (occasionally) 24, 32, 53 and (occasionally) 58. The reception for all of those usually range from low single digits to high 20s, so they never come in. I've gotten one of the PBS ones to come in for like 5 seconds at a time when I'm practically hanging my antenna out the door, but that's about it. CBC has come in for a few minutes on one occasion as well. So I'm guessing the potential to pull all of them in is there, I just need the right antenna.