Gates-Harris Intertype manufactured and marketed the Vanguard I 1kW AM transmitter during the early 1960s. The transmitter combined solid-state circuitry with a single tube amplifier. Built-in remote metering was provided as well as accommodations for top or back air exhaust. All interior components were accessible from the bottom of this transmitter, which sported an usual shape for its day.

This picture was published in the Cox Radio Annual Report from 1967. At the time, AM ruled the airwaves. FM radio was still considered new, even though many stations had been launched in the 1940s. Many FM stations were simulcasts of the AM or automated with classical or other music. The new WSB-FM studios were the equal to most AM studios in the country at that time.

Highest-rated Radio Website Clusters in the U.S.

Source: The Media Audit, Top Markets for Radio Website Listening, January 2007.