H-8453 Open Reel Magnetic Tape Unit

This unit had twice the recording density of units previously produced by Hitachi. The memory capacity for one magnetic tape was about 40Mbyte— twice that of the previous 800BPI tape—so the number of tapes was reduced. In easy-to-understand terms, the specifications were as follows: information was recorded with a recording density of 1600BPI (approx. 63 characters per 1mm) on magnetic tape with 732m in one reel, and information could be processed (read/written) at a speed of 12,000 char/s.