NEC completed the 543 magnetic tape unit in 1962. It achieved a tape running speed of 4m/s, which was the world's fastest at the time.
This unit was used with the NEAC-2230 and NEAC-2206, and it was exhibited at the first Japanese made electronic computer show in November 1962.
This unit had a pinch roller type tape drive system, and a vacuum chamber type tape shock absorber mechanism.
There were two models, the 543A and 543B, with different tape running speeds.
|Number of tracks||7|
|Tape running speed (m/s)||4||2|
|Tape rewind speed (m/s)||6|
|Start/stop time (msec)||4|
|Information recording density (bit/mm)||15|
|Information transfer speed (char(BCD)/s)||90,000||45,000|