Cadle Tabernacle

== Radio revival ==
After the Cadle Tabernacle reopened in 1931, Cadle began doing radio broadcasts from the tabernacle,<ref name=":1" /><ref name=":2" /><ref name=":4" /> although they were initially aired only locally. In 1932, Cadle secured a deal with [[WLW]], a radio station based in [[Cincinnati, Ohio]]. The station's new high-wattage signals, capable of transmitting at 500,000-watts by 1934, could reach [[Canada]] and parts of [[Central America]] under ideal conditions.<ref name=":12" /> However, most of the station's listeners lived in the [[Midwest]] and upper [[Southern United States|South]], where the station enjoyed its best reception.<ref name=":13">Slutz, p. 17.</ref> The station's high-power broadcasts led to an increased listener base compared to its previous 50,000-watt broadcasts and WLW reported receiving five times its typical amount of mail six months after the wattage increase.<ref name=":12" /> WLW was also the first station in the United States approved to broadcast at the higher wattage.<ref>{{cite journal|title=Used Same Key as Wilson |journal=Pittsburgh Press |date=May 17, 1934 |page=6  }}</ref>

WLW broadcast Cadle's program, "The Nation's Family Prayer Period", every morning for a decade.<ref name=":12" /> The program featured singing by his wife, Ola Cadle, or a guest performer. His son, Buford Cadle, introduced and closed the broadcasts, which ran from 6:00 to 6:15 a.m, Monday to Saturday, and from 11:00 to 11:30&nbsp;a.m. on Sunday. Topics often included how Cadle went from being an alcoholic to the founder of the world's largest interdenominational institution.<ref name=":14">Anderson, p. 322.</ref>

In 1934, the Cadle Tabernacle received an average of 24,000 letters a month, requiring twenty staff members to process. By 1939, the volume of letters had decreased to an estimated 4,000 a week and the program's estimated listening range was thirty million.<ref name=":14" /> Listeners used his broadcast as part of their devotional period, with some considering Cadle a close friend.<ref>Anderson, p. 324.</ref> Cadle also broadened the reach of his broadcast so more rural areas could listen, giving out free radios. An estimated 330 to 600 rural mountain churches (about 60,000 people) tuned into his show in southern Indiana, Kentucky, West Virginia, and Ohio.<ref name=":13" /><ref>Anderson, p. 327.</ref>

In the late 1930s, the [[Federal Communications Commission]] required WLW to reduce its broadcast wattage from 500,000 to 50,000 watts. After this change, Cadle began broadcasting his program on the [[Mutual Broadcasting System]], a nationwide radio network, beginning in the early 1940s.<ref>Slutz, p. 25.</ref>