circa 1972 TU10 DECmagtape Transport with tape door open and wall plates removed. This unit includes the TU10M (Master) backplane. Click for larger view.
This TU10 was a master unit ("TU10M"), meaning it contained the TM11 controller backplane installed in the cabinet with its own separate power supply. Pictured is backplane card sets for the "slave" components. You can see the TM11 controller as the backplane parallel to the front of the chassis. Click for larger view.