On Apr 30, 2023, at 10:27 PM, Ethan Dicks via cctalk <cctalk(a)classiccmp.org> wrote: On Sun, Apr 30, 2023 at 8:47 PM W2HX via cctalk <cctalk(a)classiccmp.org> wrote: Wow! Pretty neat - looks like a pack inspector for RK05, RL01/02, and RK06/07 based on the (blurry) instructions. Runout, at least, and certainly a few other measurements - would probably identify a pack that had been dropped hard enough to bend something (before you stuff it in a drive and ruin both). It doesn't look like a cleaner - I've seen an RK05 cleaner and it's a bit different - more about running a Texpad over the surface while slowly rotating than measuring anything. Cool find!

On May 1, 2023, at 09:20, W2HX via cctalk <cctalk(a)classiccmp.org> wrote: Ok thanks guys. Here is a better picture of the inside cover https://w2hx.com/x/VintageComp/Platter-Device/insidecover.jpg I would love to find a manual to this. There are lots of extra bits stored inside a compartment. But I am not near the unit at this time. Anyone have any idea about where to find documentation? Or even what the name/model of the product might be for googling? 73 Eugene W2HX Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos -----Original Message----- From: Paul Koning via cctalk <cctalk(a)classiccmp.org> Sent: Monday, May 1, 2023 8:33 AM To: cctalk(a)classiccmp.org Cc: Ethan Dicks <ethan.dicks(a)gmail.com>om>; Paul Koning <paulkoning(a)comcast.net> Subject: [cctalk] Re: DEC RL device It would be nice to get a non-blurry photo of the instruction plate. It does seem to say that it's both a cleaner and an inspection device. The inspection part includes mirrors to let you view the platter surfaces (look for scratch marks) as you rotate the pack slowly by hand. Yes, cleaning for packs of that vintage is fairly simple, a lint-free pad like Texwipe, isopropyl alcohol as the cleaning solvent. High purity would be good; 70% "rubbing alcohol" from the corner drugstore is not the best option. :-) I can't quite figure out what the "runout" thing is. Runout seems like a factory parameter, not something you'd check in the field. Or might it mean vertical distortion (warping) of the platter? That's not the normal meaning. I have seen bent platters, but I'm not sure how you'd get runout in the normal sense of the word even if a pack were dropped fairly hard. (The bent platter I remember was on an RP04 pack that was shipped to me for a customer on-site support call; it was packaged badly by so the pack cover was banged which in turn pushed against the bottom platter and bent it upward. Oops.)

paul