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wanted heathkit hw-101 manual and schematic
In article ,
Antonio Vernucci wrote: Very true. But why doing things worse when they can be easily done better. The technology to produce high quality scans has been around for almost 15 years. in early 1992, I produced for a client a CD ROM with a hypertext database of article abstracts about their product and it included 300 dpi scanned images of the articles. To put it in context, I had to write a display and print program that ran under DOS!!! because most people did not have Windows. In fact we only made 500 of them because there were so few people with CD-ROM drives. :-) My CD-ROM drive cost me over $700, about half of a 386 computer without one. Now that everyone has a computer with a bitmaped display and many people have scanners, you would think that there would be no problem getting a good high resoultion scan of the manual. However, most hams are computer users and not computer experts. They scan images with whatever program that came with the scanner and use whatever settings it defaults to. Unfortunately that's usually 200 DPI and 75% quality JPEGS. Fine for scanning a copy of your photos for a web page, or if you go directly to an inkjet printer or fax machine, but not an archive copy of a drawing printed with a printing press. File size grows geometricaly with the number of pixels you scan, a letter size page at 300 dpi is 1,000,000 pixels. Lucklily the standard for fax machines, uses a special compression method that works well for black and white images and you can use it to compress a page of text to about 50k. Line drawings tend not to be much more as it is designed to work best with linear objects. JPEG is not, it's designed to work with clumps of pixels that look alike, and many colors. It is designed to make the copy look like the original to the human eye, not be lossless compression. So the bottom line is if you have any material in your library that you would want the next generation to see, scan it in at at least 300dpi and save it as "G3" encoded TIFF files. If you have anything that you think people would want, but can't do it yourself, ask around, there may be a local ham that could and would do it for you. Geoff. -- Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM IL Voice: (07)-7424-1667 IL Fax: 972-2-648-1443 U.S. Voice: 1-215-821-1838 You should have boycotted Google while you could, now Google supported BPL is in action. Time is running out on worldwide radio communication. |
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