This was not actually part two of the pilot but rather the first episode taped after the show had been picked up. The producers simply called it "Pilot Pt. 2" because they couldn't think of a better title.
Note the map in the lobby. The radio wave circles are drastically smaller than from the pilot, and the station is now shown at 5,000 watts instead of 50,000. This was done because 50,000 is a very powerful station and the producers felt a struggling station couldn't afford that much power.
The 2-part pilot was filmed at CBS Television City in Hollywood. The rest of the episodes were taped at CBS Studio Center in the San Fernando Valley, on the same stage as The Mary Tyler Moore Show (1970). Only shots for the opening and closing credits and cutaways for a few episodes were recorded in Cincinnati.
Richard Stahl, who plays Wayne R. Coe, was originally a member of The Committee, a San Francisco comedy troupe to which Howard Hesseman once belonged. Many of Hesseman's former Committee colleagues appear sporadically throughout this series, including Hamilton Camp, Garry Goodrow, Kathryn Ish, Julie Payne, Beans Morocco, Larry Hankin, Ruth Silveira and John Brent. A 1995 stand-up comedy box set from Rhino Records features a Committee recording in which Hesseman describes the Vietnam War like a play-by-play sportscaster.