The station began as 2CO in 1931, originally based in Albury, broadcasting from an AM transmission mast on the outskirts of Corowa, covering south-west New South Wales and north-east Victoria.
2CO was reoriented to serve the Riverina region, while the Albury-based station moved to Wodonga and became 3MRR, now ABC Goulburn Murray.
The transmitter originally installed at 2CO was a STC 6.5/7 kW model manufactured in Sydney from imported components.
The water cooling was at a rate of 37 litres per minute and had a 450-litre tank and heat exchanger outside the building.
This decision was made because ABC Riverina's service territory is split by the Barassi Line, which separates the traditional centres for Australian rules football and rugby.