AZ-TV is a low power station. If you don't have cable, you are pretty much out of luck.
Before we put cable back in I could pick up AZ-TV over the air in the West Valley. Took some playing with the crap antenna I had but it was no different than tuning in a couple of the local network affilliates either. All the broadcast antennas for the valley are on top of South Mountain.
The OTA signal is 720p (per my flat screen's tuner). I would surmise the signal over Cox Channel 734 is the same.
His name is Jeff Burnton. The email address is firstname.lastname@example.org. He got back to me within 4 hours..
I emailed Jeff last year after they had shut down their analog transmitter and the digital transmitter was periodically dropping off. He responded within 24 hours with a very open answer about the situation with the transmitter.