I get all my TV, what little I watch regularly, over the air, OTA, with a moderately large antenna perched on top of 30' of conduit. An antenna rotator and line amplifier complete the rig. The whole thing cost about what my neighbors pay for cable in around three months.

With digital TV the rotator is pretty important. A few degrees can make a real difference as digital TV is essentially go/no-go. You either get enough signal to assemble a nearly perfect picture or you get nothing at all.

With analog the picture would degrade until you had snow with just a hint of a picture you could just about make out if you squinted just right and used your imagination. With digital it is pretty much all or nothing.

So far I get more channels but lost NBC. No big loss, the only show I liked was "Dexter", and a few sources seem to say that come Feb 17 NBC will have digital service in this area.

I found these sites helpful when determining where to point my antenna:

http://www.antennaweb.org/aw/Address.aspx

http://www.tvfool.com/