A google search of "phoenix channel 42.1" gets me this list -- https
/mrantenna.com/phoenix/channels/ KVPA is channel 42.1. Digital channels are different than the old analog. You don't get a snowy picture or something. You either get it or you don't. I don't know what has changed. Most of the transmitters are on South Mountain, so if your antenna is pointed south east you should be good. You are only 10 - 20 miles away from the transmitters. You can enter your zipcode into this website -- https
/antennaweb.org/ to see what direction your antenna should be pointed.