The KPO antenna was a "T" type, four wires spread six feet apart, and 114 ft. in length. It was supported by two 125 ft. towers which had been erected by the Pacific Coast Steel Co. on the roof of the Hale Brothers' Department Store on Market Street. This gave the antenna a total height over the street of 220 ft. The studio and transmitter were located on the sixth floor of the store building.