> 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
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
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
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
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
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
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 I don't know if they've been archived or not - there are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
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
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
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
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
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
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