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 something
> 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 hearin
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 ind
...@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 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 tr
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 that is
> easy to s
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
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 analysis to recover that data; this occurs to me because
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 good
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 me because I've
> > done a fair bit of image reco
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 solution may not be
> feasible for
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 know if they've been arch
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