In the pilot, WKRP was depicted (both on the map in Jennifer's office and by Dr. Johnny Fever on the air) as a 50,000 watt station. In subsequent episodes, the station was "demoted" to 5000 watts which was probably more appropriate for a "struggling" operation as very few maximum power AM stations have ever had difficulties with format and audience attraction.
Carlson picks up his fishing rod as Andy leaves the office, but in the next shot he's grabbing at his pants by the knees as he sits down.
Odd that a Top 40 station would not play 45 rpm singles on the air and, when Andy Travis, the new Program Director, gives Johnny Caravella (who becomes Dr. Johnny Fever) rock 'n' roll records (all albums), the first record (in the new format) he spins ends up "playing the label" when they break for a commercial.
Andy Travis said he was brought in from Santa Fe to be the program director. If he was referring to the last radio market he worked in, he would've said Albuquerque, of which Santa Fe is part of. He may have worked at a station in Santa Fe last (as they have a handful of stations licensed there), but he would've likely mentioned the big city to emphasize the market.
In the pilot episode just after Johnny says "Booger" during WKRP's format change to rock music, the record playing on the turntable can be seen with the needle playing on the label portion of the record yet the music is playing.
Johnny cues up WKRP's first Rock record by looking at it closely, with no headphones and no speaker to tell you where the needle is on the record. If you are looking at audio levels on the board, it is possible, but HIGHLY unlikely that the record will start in the right spot.
When Johnny plays the first Rock and Roll record, he spins the turn table emphatically to start it up. He then gets into character as Johnny Fever and announces the format change. When we cut back to the long shot, we can clearly see that the needle on the record that is playing was knocked when Johnny spun the turn table. It is now resting up against the spindle. Yet the music is still playing fine.
After the rock music change, the needle on the turntable is on the label of the record, yet music is playing.
The last song, "(You're) Having My Baby"'s record is on Columbia, but the record jacket was made by Capitol Records.