The National Voice of America Museum of Broadcasting is the main building and campus of the original VOA, Bethany Relay Station. Three museums — the Gray History of Wireless Museum, the National Voice of America Museum of Broadcasting and the Media Heritage collection along with the West Chester Amateur Radio Association WC8VOA — occupy portions of a cavernous building that was constructed nearly 70 years ago and originally housed several custom-built 250 kW HF transmitters.