Re: Restoring Old Paper Tape

2016-01-22 Thread Dennis Boone
> Did anyone get a schematic on the values the fellow used in the > article on vintage-computer.com? Not necessarily to squelch discussion of building optical readers, but the original question was more about archival preservation of tapes suffering from bad storage. I'd be interested in

Re: Restoring Old Paper Tape

2016-01-22 Thread COURYHOUSE
on moldy paper and other items generally we will bag it and tag it to isolate it from everything else... check part # or document name ( in the case of printed material) against what already exists. if it exists then the moldy nasty stuff is scrap. If it is

Re: Restoring Old Paper Tape

2016-01-22 Thread Corey Cohen
Another option is something like an op-80a where you can manually pull the tape across sensors making sure you don't damage it. Essentially a low tech version of what you guys described using a video camera. The op-80a doesn't have a physical sprocket to break the tape, it uses the sprocket

Re: Restoring Old Paper Tape

2016-01-22 Thread Randy Dawson
gmail.com> Sent: Friday, January 22, 2016 8:27 AM To: j...@flippers.com; General Discussion: On-Topic and Off-Topic Posts Subject: Re: Restoring Old Paper Tape On Thu, Jan 21, 2016 at 10:48 PM, John Robertson <j...@flippers.com> wrote: > >> Would it not be simpler to make

Re: Restoring Old Paper Tape

2016-01-22 Thread jwsmobile
On 1/21/2016 10:48 PM, John Robertson wrote: On 01/21/2016 6:46 PM, Charles Anthony wrote: -- Charles Would it not be simpler to make an optical reader to handle this job? You need a light source and the correct number of opto transistors to read the light from each hole. There is an

Re: Restoring Old Paper Tape

2016-01-22 Thread Charles Anthony
On Thu, Jan 21, 2016 at 10:48 PM, John Robertson wrote: > >> Would it not be simpler to make an optical reader to handle this job? > You need a light source and the correct number of opto transistors to read > the light from each hole. There is an index built into the tape so

Restoring Old Paper Tape

2016-01-21 Thread Jason T
I'm tossing this out here as a conversation-starter more than a request for help, although I may end up putting the knowledge to use. Today I received a set of original HP paper tapes for the 2115a machine. I don't know if they've been archived or not - there are dozens of HP tapes on bitsavers

RE: Restoring Old Paper Tape

2016-01-21 Thread Jay West
By all means, let's discuss and it will be a useful and fascinating conversation both now and in the future. But just as a thought for the more immediate issue (your tapes)... I find it somewhat unlikely that a significant number of early HP 21XX paper tapes are not already archived, or in

Re: Restoring Old Paper Tape

2016-01-21 Thread Charles Anthony
On Thu, Jan 21, 2016 at 5:56 PM, Jason T wrote: > I'm tossing this out here as a conversation-starter more than a > request for help, although I may end up putting the knowledge to use. > Today I received a set of original HP paper tapes for the 2115a > machine. I don't

Re: Restoring Old Paper Tape

2016-01-21 Thread Jason T
On Thu, Jan 21, 2016 at 8:04 PM, Charles Anthony wrote: > For part 2, personally, I would take movies of the paper tape moving and > doing image analysis to recover that data; this occurs to me because I've > done a fair bit of image recognition software, so this

Re: Restoring Old Paper Tape

2016-01-21 Thread Charles Anthony
On Thu, Jan 21, 2016 at 6:21 PM, Jason T wrote: > On Thu, Jan 21, 2016 at 8:04 PM, Charles Anthony > wrote: > > For part 2, personally, I would take movies of the paper tape moving and > > doing image analysis to recover that data; this occurs to

Re: Restoring Old Paper Tape

2016-01-21 Thread John Robertson
On 01/21/2016 6:46 PM, Charles Anthony wrote: On Thu, Jan 21, 2016 at 6:21 PM, Jason T wrote: On Thu, Jan 21, 2016 at 8:04 PM, Charles Anthony wrote: For part 2, personally, I would take movies of the paper tape moving and doing image