In 1978, the station moved from 1460 to 1458 kHz, as part of a nationwide radio frequency adjustment. Two years later, on 2 August 1980, 2NM changed its frequency again from 1458 kHz to 981 kHz to improve reception in parts of the Upper Hunter. A new 5000 watt transmitter site was commissioned on Begalla Road, next to the Bengalla coal mine. The old 2NM tower on McCullys Gap Road was not torn down until 2009. The old transmitter building still stands to this day. 1458 kHz was reassigned as the Newcastle frequency for ABC NewsRadio.