[GreenKeys] URA-17 [schematic]

[Brooke Clarke]

Hi Randy:

I went through a similar problem when working on a web page for the HP E1938 
Ovenized Crystal Oscillator, http://www.prc68.com/I/HPE1938.shtml

There are two ways to describe an image, one is as a raster and the other is as 
   vectors.  Television and FAX work with raster images and pen plotters work 
with vector images.

If you can get a schematic into a vector format it takes MUCH less storage than 
when it's a raster image AND it can be scaled by the end user.

Photoshop works with raster images and as far as I can tell can not output a 
vector format file.  I've heard that Corell Draw ((spelling?) can.  Acrobat can 
be used on either vector or raster images to make pdf files.

For example the total document package for the E1938 is a ZIP file of only 1.2 
MB and one of the drawings is a "D" size schematic and after expanding the ZIP 
file it's only 470 kB and I expect is comparable to the URA-17 schematic.

I wasn't able to generate the needed vector files, it was done by someone on 
the the list server where the E1938 was being discussed.

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.precisionclock.com
http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam


Randy or Sherry Guttery wrote:
> I've received a some comments about the URA-17 schematic...
> 
> Ideally - we'll find an original that can be scanned (whole manual, 
> eventually) - which will (IMHO) provide a much better result - with no 
> where near the work required to "reconstruct" the schematic I have.  My 
> intention was to provide "something" that was usable until a more proper 
> solution was found. "Something" being better than nothing.
> 
> With that in mind - a couple of comments:
> 
> First - please understand this is a 30+ year-old photocopy. "Back in the 
> day" the photocopiers we had aboard ship weren't very good - if working 
> at all. They weren't "flat bed" - you had to feed the original "through" 
> the machine - which meant that these large - fold-out schematics had to 
> be "folded" and copied in sections - the copies then taped together. Not 
> a pretty process.
> 
> Second - what I have is a 30+ year old photocopy. Made the way it was - 
> it's quality isn't good to begin with - and while it hasn't faded much - 
> the paper certainly has yellowed some - the tape much more, even under 
> an illuminated magnifier - parts are impossible to read - and none of it 
> is really very good...
> 
> I used a good (not great) scanner to make the scans - scan*s* because 
> it's only capable of 8.5 X 14... so this foldout oversize schematic took 
> four scans. Using the Photoshop 8 component of Adobe Creative Suite - I 
> combined the four scans into one. Needless to say - the resulting image 
> file is huge.
> 
> With my original goal in mind of supplying a "stop-gap" solution - I 
> cleaned up the schematic, replaced much of the unreadable text - 
> compressed it down to a more practical download size of 11Mb (jpg) and 
> uploaded it for anyone needing something of a schematic.
> 
> Apparently this has disappointed some.
> 
> So - The original .raw and original .tif files are now uploaded on my 
> site (or will as soon as the uploads finish - at these file sizes it's 
> going to take a while - even on my DSL.)
> 
> http://www.comcents.com/ura17.raw
> http://www.comcents.com/ura17.jpg
> 
> Have at 'em.  Anyone/everyone has my permission to download them and use 
> them for their own, private use. Clean, tweak and have a ball.
> 
> Just FYI - these file are BOTH well over 300Mbs each...
> 
> best regards...