sentences:  But at night, to protect other stations on AM 910, the station reduces power to 1,000 watts and uses a directional antenna.The station is East Tennessee's AM primary entry point station for the Emergency Alert System, with WJXB-FM in Knoxville performing the PEP function on FM in east Tennessee.On December 13, 1938, the station first signed on as WJHL, owned by John H. Lancaster, Sr.