Complex sentence: The station was unable to afford a network feed, so for most of its history, engineers simply switched to and from the signal of WTPA-TV (now WHTM-TV) in Harrisburg.
Split into simpler sentences: The station was unable to afford a network feed. For most of its history, engineers simply switched to and from the signal of WTPA-TV (now WHTM-TV) in Harrisburg.