On 3/14/19 1:51 PM, Rick Bensene via cctalk wrote: > In an earlier posting, I stated that the 4014 (with its 19" DVST tube) > was the largest DVST display that Tektronix made, to which > Paul K. responded: > >> An article about those terminals also turns up the 4016 (25 inch tube > -- 4014 is 19 inches). I'm not sure any more which of the two it >> was. > > I stand corrected. > > I never saw one of these during the 13 years (1977-1990) that I worked > at Tektronix. But, after looking around online, indeed, they exist, > and there are a number of them still around, including a beautiful, > working example at the local Tektronix museum, VintageTek.org. This is > probably the article that Paul referred to: > > https://vintagetek.org/dvst-graphic-terminals/ > > Funny, last time I was at the museum (which was probably two+ years > ago), I didn't see it...perhaps it's a newer acquisition. Had I seen > it, I would have been surprised, since it was always my impression that > the 19" tube was the largest. > > The 25" tube had to have some pretty crazy geometry correction circuitry > in the deflection system to correct for the curvature of the tube face > in X and Y dimensions, as well as probably some beam power correction to > account for the curvature. A pretty amazing accomplishment, for sure. > Tektronix had some really amazing CRT engineering folks, as well as > fabulous CRT fab facilities back in the day. > > Thank you, Paul, for pointing out my error. Definitely an example of > learning something new every day :-) >
Personally, I think it would be really neat if some of these computer museums could collect complete end-product systems and make them run. Can you imagine showing a bunch of students how a newspaper was produced using a PDP-11 and one of these Tek terminals feeding a real printing press. bill
