This state of the art radio facility was completed in 1942 on the corner of O’Farrell and Taylor streets in San Francisco. Radio CIty was home for a time to Radio Stations KPO and KGO, both were NBC stations. At the time, KGO was on 790Khz while KPO was on 680Khz.
Now KGO is on 810Khz while KPO eventually became KNBR, is still on 680Khz. The Radio City building is still there but little history remains. A
janitorial electronic medical records company now occupies this relic of another time.
You can read more about San Francisco’s Radio City here http://www.theradiohistorian.org/radcity.htm