4 Nov
2025
4 Nov
'25
12:48 p.m.
From: Paul Koning <paulkoning(a)comcast.net>
...
Bitsavers has the 3M spec for 480 and 481 sandwich tape, I'm not sure
which of these two is what DEC used. It seems crazy, but it can't hurt to
ask 3M if they still make that stuff.
paul
The LINCtape pictures in Dave Gesswein's site make it clear that DECtape is 3M 481
tape, except really old ones which apparently are 489. I'd love to see a 489 spec
sheet. Assuming that "1.0 mil" refers to the substrate, 489 is a hair thicker
than 481 (which has an 0.92 mil substrate according to the data sheet).
paul