The ECMA standard for 3480 specifies a length of at least 165 m, a width of 12.65 mm +/- 0.025, and a thickness between 0.0259 mm and 0.0337 mm (approximately 30 um).
I could not find a standard for the 3592 with 1000 m of tape. Since 1) the volume inside the cassette is about the same as the 3480 and 2) the length has increased by a factor of 6.7, then the thickness needs to decrease by the same factor, making your estimate of 5 um seem very reasonable. > -----Original Message----- > From: IBM Mainframe Discussion List <[email protected]> On Behalf > Of R.S. > Sent: Sunday, May 20, 2018 6:18 AM > To: [email protected] > Subject: Tape thickness > > Out of curiosity: what is magnetic tape thickness? > How did it changed since times of 3480? > > Note, 3480 cart contained 160 meters of tape, current cart has almost > same dimensions but contains 1072m of tape. > From my very rough calculations it's order of magnitude 5 um > (micrometers), but it's just quick and dirty calculation. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
