DrAkbar
Star Participant
The night pattern looks like a squished amoeba due to the number of nulls needed to run 5kw at night: https://radio-locator.com/cgi-bin/patg?id=KFXR-AM&h=N At the time, WOWO in Ft Wayne & KEX in Portland were the two 50kw co-channel stations that needed the most protection. Then when you starting going to adjacent channels, the 900lb gorilla in McLendon's room was clear channel WOAI in San Antonio. After nulling that one, McLendon had to deal with other 50kw's on second and third channel adjacents. YIKES! However, with the amount of RF beamed toward downtown Dallas at night, car radios were probably playing 11~Ninety..whether they were turned on or not!