🚀 go-pugleaf

george@mech.seas.upenn.edu writes:
>:  The CRT is the shortest-lived part in the display by a wide margin,
>maybe at HP :-)
>most of the 'display' failures i've seen have been power supply related.
>we are 'nursing' our last-surviving DEC regis-capable terminal
>by leaving it on all the time

My Heathkit H29 terminal also had power supply problems that I "cured" by
not turning it off.  The filament is powered by the master 12V regulator (an
LM350T), and though it is supposed to be short-circuit proof, I think the
cold-filament inrush current three or four times a day was cooking the
regulator, since I was replacing the LM350T every three months or so until
I stared at the circuit diagram for hints about overloads.  Probably I ought
to give the filament its own 12V transformer, but at this point it's not clear
that the value of an H29 terminal exceeds the cost of a Radio Shack 12V
transformer... ;-)