KTOL was first heard in the fall of 2002, transmitting from a tower off Ridge Ranch Road in the hills east of Geyserville. The station was launched by JYH Broadcasting, controlled by Sonoma County business owner Judy Yep Hughes. She had earlier obtained a construction permit for Windsor-licensed KMHX but realized a profit by selling the CP before the station went on the air.
Two years later, KTOL became KNOB.
