On 11/4/2025 12:48 PM, Paul Koning via cctalk wrote:
From: Paul Koning <[email protected]> ... 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. paulThe 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
This may be insanely naive on my part, but wouldn't it be possible to use cut down tape from existing sources to use as a replacement? Something like 9 track, or even VHS tape... DIYing a device to create split tape wouldn't be that difficult.
g. -- Proud owner of F-15C 80-0007 http://www.f15sim.com - The only one of its kind. http://www.diy-cockpits.org/coll - Go Collimated or Go Home. I'm not crazy, I'm plausibly off-nominal! ScarletDME - The red hot Data Management Environment A Multi-Value database for the masses, not the classes. https://github.com/geneb/ScarletDME - Get it _today_!
