11 Nov
2014
11 Nov
'14
3:03 p.m.
Persistence is directly related to beam intensity.. does it still linger so
long when its dimmed down?
Otherwise, I don't see any way for the phosphor chemistry to change much
over time, being hermetically sealed up in there. If anything, I'd expect
persistence to +diminish+ with age, as the materials deplete (if such
action occurs).
But like most chemical / physical processes, temperature may well have a
notable effect. Longer persistence when cold would make sense, in that
instance.
On Tue, Nov 11, 2014 at 4:42 PM, Ali <cctalk at fahimi.net> wrote:
I'd
forgotten about the long persistence phosphor in the CRT until Tony
mentioned it - is it highly temperature-dependent
It does take a very long time although 20 seconds seems a bit extreme. The
first time I turned one on after not having used one for over a decade I
was
surprised as well.
-Ali