Tribune Co. bought National TV Log Inc. of Pasadena.

Tribune Media Services Inc., a unit of Orlando, Fla.-based Tribune Co., paid about $5 million for the privately held national marketing and services company that sells “bold face” advertising for insertion into newspaper television listings. Aubrey Ison, chairman of National TV Log, said that the company, which had sales of about $9 million in 1984, will remain in Pasadena, and no layoffs are planned.