How to build an ASCII CRT terminal, circa 1967

Eric Christopherson echristopherson at
Wed Aug 31 11:09:41 CDT 2016

On Wed, Aug 31, 2016 at 10:15 AM, Al Kossow <aek at> wrote:

> Magnetorestrictive delay lines and a charactron.
> Model_70_752_Video_Data_Terminal_Maintenance_Manual_Oct73.pdf
> We got one (no keyboard) a couple days ago with the manual. I'm still
> cleaning it up. It had something nesting in it and
> the inside has sunflower seed husks in it. It was made with plastic DIP
> ICs, no idea of the logic family. The keyboard
> was made by IBM, don't know what character code it produces. Pretty funky
> if it encodes ASCII.

That URL redirects to
, which is showing a 404.

        Eric Christopherson

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