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Article #621052Re: Why so many 6s and 8s in the 70s?
From: Dan Espen
Date: Mon, 19 Mar 2018 23:25
Date: Mon, 19 Mar 2018 23:25
33 lines
3052 bytes
3052 bytes
Rich Alderson <ne...@alderson.users.panix.com> writes: > Dan Espen <dan1...@gmail.com> writes: > >> hanc...@bbs.cpcn.com writes: > >>> As Campbell-Kelly explains in their book, the beauty of the >>> IBM 1401 was not in its electronics (not a big deal) but rather >>> the 1403 printer, which gave high quality at a significantly >>> faster rate. As mentioned, I remain amazed that for _years_, >>> customers tolerated wavy lines of other mainframe line printers, >>> even slow ones. > >> Just to defend the slower IBM 1443 common on the 1440, it produced >> pretty high quality output. > > I'm going to disagree with this. I learned to program on a 1401/1402/1403 > system as a senior in high school. When I was exposed to the 1442 attached > to the IBM 1800 at the CAI Laboratory at UTexas the next year, I was appalled > at the print quality. Of course you would be unhappy, the 1442 was a card reader punch. :) Yeah, I know typo. Anyway I remember it as pretty good but I don't have any listings from a 1443 and Google isn't helping. Vertical alignment should have been perfect. Horizontal would be based on timing circuits, possibly your printer was out of adjustment. Print density should be similar to a 1403, the hammer had to hit the paper pretty much the same way. -- Dan Espen
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