Re: 8 inch floppies, decaying

2018-07-13 Thread Chuck Guzis via cctalk
On 07/12/2018 09:05 PM, David C. Jenner via cctech wrote: > Would Chuck's temperature and Al's oven be appropriate for old magtapes, > too? My "cooker" is home-built and heavily insulated. It has a 75W incandescent for heat and a low-speed fan for circulation. I use a PID controller to keep the

Re: 8 inch floppies, decaying

2018-07-12 Thread David C. Jenner via cctalk
Would Chuck's temperature and Al's oven be appropriate for old magtapes, too? On 7/11/18 9:10 AM, Al Kossow via cctech wrote: On 7/11/18 8:57 AM, Rob Jarratt via cctalk wrote: Be wary though, domestic ovens apparently fluctuate wildly. Use a food dehydrator this is the unit I use for QIC

Re: 8 inch floppies, decaying

2018-07-12 Thread Liam Proven via cctalk
On Wed, 11 Jul 2018 at 20:05, Fred Cisin via cctalk wrote: > > Don't use pumice to clean off the pumas. (they won't like it) > Stick with well whale oil. Also great for rosewood, I hear. -- Liam Proven - Profile: https://about.me/liamproven Email: lpro...@cix.co.uk - Google Mail/Hangouts/Plus:

Re: 8 inch floppies, decaying

2018-07-12 Thread Christian Corti via cctalk
On Wed, 11 Jul 2018, Al Kossow wrote: On 7/11/18 2:21 AM, Christian Corti via cctalk wrote: I use Screen 99 for cleaning floppies MSDS https://store.comet.bg/download-file.php?id=16956 first ingredient listed; isopropyl alcohol Of course, somehow you need some "magic" in the stuff ;-) But a

Re: 8 inch floppies, decaying

2018-07-11 Thread dwight via cctalk
I'm the victim of the spell checker. Thanks for the fix. Dwight From: cctalk on behalf of Fred Cisin via cctalk Sent: Wednesday, July 11, 2018 11:05:43 AM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: 8 inch floppies, decaying On We

Re: 8 inch floppies, decaying

2018-07-11 Thread Fred Cisin via cctalk
On Wed, 11 Jul 2018, dwight via cctalk wrote: Next is the smooth orange oil hand cleaner. ( not the stuff with pumas ). Really cleans things great and good for killing ants. Again, rinse maybe it might need a little detergent and then rinse. Don't use pumice to clean off the pumas. (they won'

Re: 8 inch floppies, decaying

2018-07-11 Thread dwight via cctalk
ral I'd go with Chuck's advice. He has done more work with disk and tapes than anyone here else except possibly Al. Dwight From: cctalk on behalf of Al Kossow via cctalk Sent: Wednesday, July 11, 2018 9:10:14 AM To: cctalk@classiccmp.org Subject: Re:

Re: 8 inch floppies, decaying

2018-07-11 Thread dwight via cctalk
27;d go with Chuck's advice. He has done more work with disk and tapes than anyone here else except possibly Al. Dwight From: cctalk on behalf of Al Kossow via cctalk Sent: Wednesday, July 11, 2018 9:10:14 AM To: cctalk@classiccmp.org Subject: Re: 8 inch

Re: 8 inch floppies, decaying

2018-07-11 Thread Al Kossow via cctalk
On 7/11/18 8:57 AM, Rob Jarratt via cctalk wrote: > Be wary though, domestic ovens apparently fluctuate wildly. Use a food dehydrator this is the unit I use for QIC tapes (weston 10 tray stainless steel dehydrator model 74-1001-2) https://www.ebay.com/itm//113143490361 but I do them a coupl

RE: 8 inch floppies, decaying

2018-07-11 Thread Rob Jarratt via cctalk
Be wary though, domestic ovens apparently fluctuate wildly. I did have success with some TK50s in our fan oven set at 40C Sent from my Windows 10 phone From: Chuck Guzis via cctalk Sent: 11 July 2018 16:31 To: Adrian Graham via cctalk Subject: Re: 8 inch floppies, decaying On 07/11/2018 02:53

Re: 8 inch floppies, decaying

2018-07-11 Thread Al Kossow via cctalk
On 7/11/18 8:20 AM, Al Kossow via cctalk wrote: > > > On 7/11/18 2:21 AM, Christian Corti via cctalk wrote: > >> I use Screen 99 for cleaning floppies > > MSDS > > https://store.comet.bg/download-file.php?id=16956 > > first ingredient listed; isopropyl alcohol > > Since I haven't menti

Re: 8 inch floppies, decaying

2018-07-11 Thread Chuck Guzis via cctalk
On 07/11/2018 02:53 AM, Adrian Graham via cctalk wrote: > What temperature oven? 58C +/- 0.5C --Chuck

Re: 8 inch floppies, decaying

2018-07-11 Thread Al Kossow via cctalk
On 7/11/18 2:21 AM, Christian Corti via cctalk wrote: > I use Screen 99 for cleaning floppies MSDS https://store.comet.bg/download-file.php?id=16956 first ingredient listed; isopropyl alcohol

Re: 8 inch floppies, decaying

2018-07-11 Thread Adrian Graham via cctalk
> On 11 Jul 2018, at 03:15, Chuck Guzis via cctalk > wrote: > > No, no, no! Do not use isopropanol to clean floppies--you'll wind up > with a soft oxide coating and a brown rag. Were these mine, I'd first > remove them from their jackets and then bake them and then clean them > with distilled

Re: 8 inch floppies, decaying

2018-07-11 Thread Adrian Graham via cctalk
> On 11 Jul 2018, at 09:33, Terry Stewart via cctalk > wrote: > > Just my experience, I once did a trial where I took two identical 5,25 > inch disks of the same batch from the same manufacturer. These were clean > disks which both formatted and verified just fine, but I wanted to see if > I

Re: 8 inch floppies, decaying

2018-07-11 Thread Christian Corti via cctalk
On Wed, 11 Jul 2018, dwight wrote: I've had the goo from the adhesive of 5.25 inch 360k disk come through the nice liner and make gobs on the disk. I tried several thing but found that isopropanol worked without removing any of the magnetic material ( maybe s tiny amount that was likely loose a

Re: 8 inch floppies, decaying

2018-07-11 Thread Terry Stewart via cctalk
Just my experience, I once did a trial where I took two identical 5,25 inch disks of the same batch from the same manufacturer. These were clean disks which both formatted and verified just fine, but I wanted to see if IPA did indeed damage the disk. One I swabbed one with 75% IPA, the other wit

Re: 8 inch floppies, decaying

2018-07-11 Thread Steve Malikoff via cctalk
Fred asked > What concentration of IPA were you using? 99% Laboratory grade. Not very pleasant to have on the skin, it dries it out shockingly. > There might be a difference in results between 70% and 91% > > There might also even be a difference in the oxide formulation between > brands. (If C

Re: 8 inch floppies, decaying

2018-07-10 Thread Chuck Guzis via cctalk
On 07/10/2018 09:14 PM, Steve Malikoff via cctalk wrote: > So there you have it. I'm not asserting that all diskettes were manufactured > as well as this IBM one but I stand by > what I suggested, I would certainly try IPA again if I had to. By the 1970s I > would think a diskette surface had co

Re: 8 inch floppies, decaying

2018-07-10 Thread Fred Cisin via cctalk
No, no, no! Do not use isopropanol to clean floppies--you'll wind up On Wed, 11 Jul 2018, Steve Malikoff via cctalk wrote: Well, I suggested IPA (to Chuck's horror) so decided to put my money where my mouth is and try it myself. Using a 38-year old 8" IBM Diskette 1 (128-bit sectors) that I ha

Re: 8 inch floppies, decaying

2018-07-10 Thread Steve Malikoff via cctalk
Chuck reckoned > No, no, no! Do not use isopropanol to clean floppies--you'll wind up > with a soft oxide coating and a brown rag. Were these mine, I'd first > remove them from their jackets and then bake them and then clean them > with distilled water and perhaps a couple of drops of a wetting ag

Re: 8 inch floppies, decaying

2018-07-10 Thread dwight via cctalk
g it would be the same for 8 inch disk. Once working I did copy them to floppies without liners. Dwight From: cctalk on behalf of Chuck Guzis via cctalk Sent: Tuesday, July 10, 2018 7:15:13 PM To: Richard Pope via cctalk Subject: Re: 8 inch floppies, decaying

Re: 8 inch floppies, decaying

2018-07-10 Thread Chuck Guzis via cctalk
No, no, no! Do not use isopropanol to clean floppies--you'll wind up with a soft oxide coating and a brown rag. Were these mine, I'd first remove them from their jackets and then bake them and then clean them with distilled water and perhaps a couple of drops of a wetting agent (Kodak Photo-flo is

Re: 8 inch floppies, decaying

2018-07-10 Thread Richard Pope via cctalk
Steve, Adrian, I am pretty certain that alcohol will break down the binders and remove the oxide. Since the bad disc was run through the drive the head/heads should be cleaned before any more read or write attempts are made otherwise more discs will be damaged. Thanks, rich! On 7/10/2018

Re: 8 inch floppies, decaying

2018-07-10 Thread Steve Malikoff via cctalk
Adrian said: > Tonight I got my imaging PC to successfully read some of the 8” disks from my > CPT8500 word processor using one of its own Tandon TM848-01 drives, sadly it > seems the boot disk is toast but I’ve been able to dump some of the data > disks as well as the Utilities. Since I have a

8 inch floppies, decaying

2018-07-10 Thread Adrian Graham via cctalk
Hi folks, Tonight I got my imaging PC to successfully read some of the 8” disks from my CPT8500 word processor using one of its own Tandon TM848-01 drives, sadly it seems the boot disk is toast but I’ve been able to dump some of the data disks as well as the Utilities. Since I have a box of unu