I've read that for green phosphors, P31 is supposed to be "tougher" than P1. But I've not seen data that compares phosphor life between other types.

I approach the problem with aggressive screen saving using a PIR to detect room occupancy. When nobody is detected I change the display from a fairly static clock image to something much more bouncy. Then I shut off the EHT after a while longer, then eventually turn off the heater as well. When the clock faces are displayed I jiggle the image in a X/Y pattern to try to even out the screen usage.

I suppose its the same logic as "savers" with nixies to reduce or spread wear.

Grahame

On 15/06/2018 16:45, gregebert wrote:
On a related note, are there any recommendations for a CRT that is known to be reliable and not easily burned from long-term usage ?
That would influence my choice for a scope-clock kit.

I have yet to fire-up one of my 3L01I tubes, and so far I've seen mixed reviews on it's phosphor life.
Maybe it's penance for all those CRTs I enjoyed smashing years ago........
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