If you're trying to get Channel 6, with no luck so far, give this a try. Find a pair of dipole rabbit ears - the kind that used to be attached to every television that you brought home from the store back in the '70s and '80s (and before). This is simply two telescoping rods.
Pull each section out to exactly 36", and place each one straight out and parallel to the floor. Rotate them so that they are "facing" Roxborough. Do a scan on your digital tuner, or manually lock it into Channel 6.1 if it will allow you to do so. If everything is aligned just right, you MIGHT just pick up Channel 6.
Until a few months ago, I was living in the area, north of the signal about 20 miles and in a ground floor apartment that faced either north or east. Getting Channel 6 wasn't easy, but the above formula worked well enough that I got to view what I needed when I needed it.
That's not to say that it wasn't suscepitble to dropouts and interference. Heck, anytime the guy upstairs (affectionately known to us as "bigfoot") moved around, the signal was likely to get interrupted. But, we perservered and managed for the short time we lived there.