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This document quotes the George Gray UNIVAC I history (see which is in conflict with the UNIVAC I documents on bitsavers. The U-I programming manual states the tape densities were "100 pulses per inch" for U-I operation and "20 pulses per inch" for compatibilty with the UNITYPER.

A few minor points[edit]

  • The UNISERVO I wasn't phase encoded. The first phase-encoded drive from UNIVAC was the UNISERVO IIIC, which was 1000 BPI, 1 mil Mylar tape, 3600 feet per reel. If it had been phase-encoded, it wouldn't have needed a clock track.
  • The UNISERVO motors were powered by McIntosh audio power amplifiers. --John Nagle (talk) 19:21, 12 December 2007 (UTC)
More info on tape format: [1][2] John Nagle (talk) 19:24, 1 February 2016 (UTC)
Table of tape formats: File:U.S. Census Bureau Tape Formats (1972).png. John Nagle (talk) 20:10, 1 February 2016 (UTC)