TC11 DECtape Control Engineering Change Order Log

This document contains a log of Engineering Change Orders (FCOs) for the TC11 DECtape Control unit, covering the PDP-11 family of computers. It lists several modifications implemented between 1972 and 1973, detailing the problems encountered and the corresponding technical corrections for each change. Included entries are:

• TC11-C011A: Updates to BREAK-IN/EFFECTIVITY terminology.
• TC11-00012: Documentation corrections to unit assembly drawings and parts lists.
• TC11-00013: Power control and cabinet configuration adjustments.
• TC11-00014: Fuse protection modification for TU56 drives.
• TC11-C0015: Logic addition to ensure tape synchronization.
• TC11-00016: Updates to assembly drawings for spacer/latch molding replacement.