[vcf-midatlantic] Greenbar print

David Gesswein djg at pdp8online.com
Sun Feb 28 12:59:16 UTC 2021

On Sat, Feb 27, 2021 at 11:58:32PM -0500, Mike Loewen via vcf-midatlantic wrote:
> On Sat, 27 Feb 2021, Jeffrey Brace wrote:
> > So someone else pointed out that dot matrix printout isn't historically
> > accurate. So what kind of printer would have actually been used for the
> > Apollo 8 code?
>    A chain-train or drum printer, such as an IBM 1403. The CHM has a working
> 1403 on their 1401 system. I wonder why she didn't contact them?

If you look at the scans 

The characters shift vertically so most likely a drum. The band/chain
tend to shift more side to side. Side to side shift is said to be less
objectionable than vertical shift so the 1403 was considered to have
good print quality. Some of the DEC maindec listing have really annoying
vertical shift.

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