Tektronix 4014-1 troubleshooting advice

On Mar 27, 2015, at 3:40 AM, Pontus Pihlgren <pontus at Update.UU.SE> wrote: Hi We have a 4014 at the computer club and that patterns looks very familiar. It usually clears after a minute or so. We have assumed it was normal and have not investigated. Congratulations on a nice find! I'm quite jealous. /P On Thu, Mar 26, 2015 at 10:03:03PM -0700, Josh Dersch wrote: > Hi all -- > > Picked up a Tektronix 4014-1 terminal. It's in pretty good shape, > nice and clean and it's in nearly-working condition except that the > storage behavior isn't quite right. > > On power-up, write-through doesn't. (That is, characters don't get > stored to the tube.) Clearing the display via the RESET/PAGE key > clears a roughly elliptical region in the center of the display but > leaves the outer edges a mess. The cleared region stores characters > properly. You can see the overall effect here: > > http://yahozna.dyndns.org/scratch/tek4014/clear.jpg > > After a 2-3 minutes of warming up the area cleared by RESET/PAGE > increases.