Complex sentence: Channel 18 began originating its own color programming in 1969 by adding color film capabilities with an RCA TK-27 and shortly thereafter from the studio with RCA TK-42's.
Split into simpler sentences: Channel 18 began originating its own color programming in 1969 by adding color film capabilities with an RCA TK-27. Shortly thereafter live color from the studio was added with RCA TK-42's.