Charles William (C.W.) Burpo (January 4, 1904 - March 1982) was a nationally known radio evangelist who was heard in the USA during the 1970s. His program was known as the "Bible Institute of the Air," the same name as his ministry. I know this for a fact as I used to listen to him on WXRI-FM in Portsmouth, Virginia --- the radio arm of the Christian Broadcasting Network (CBN). Dr. Burpo broadcast from his studio at The Bible Institute of the Air, Inc., of which he was its Director and located in Mesa, Arizona.
"Doctor Burpo", as he was called by friends and foe, was a supporter of what is today classed as conservative politics mixed with fundamental religion. His broadcasting signature was the sound effect of a closing door announcing his intention to pray in his radio "Throne Room". His fame appears to have died with him.
Burpo, C. W. Throne Room Rights. 1971. (76 pages) The Bible Institute of the Air, Mesa, AZ. See: by Rev. R. L. Choleva. (Dr. Burpo) "...was best remembered during the mid 1970’s as a Minister of the Gospel who had the radio program known as the Radio Chapel of the Air who would come on the air every day Monday through Friday ...at about 1:00 pm in the afternoon. His lasting impression was how he could pray and the effect he left on me because he was very original and plain......