Gordon JC Pearce wrote:
I've just got hold of an old (probably late-80s)
Hughes 800 projector.
It's a couple of feet long and very very heavy. Inside is a big xenon
lamp, a CRT of some kind, and some optics.
I dont know of any way that shining light on a CRT would produce joy,
because
the CRT will emit light. If it is not a CRT but is a device that works
by tranmission
from a white light source, it would not be making the
noise, or have
sweep circuits,
but it would also be possible that it was working and be difficult to see.
I had a GE theatre size projector which had an integrated CRT. It used
such high voltage to zap phosphor that it was an Xray hazzard, and in and
of itself had become radioactive from long operation (it was 25 to 30
years old when I got it). It had a 12" diameter schmidt corrector and a 15
or so inch diameter primary, and was a rearward projecting Schmitt / Cass
optical system.
I assume your system is reflective, with the lamp optically shining on the
CRT, or do you think it is tramsissive, thru the CRT tube?
so about all I can help with here with the post is to suggest you dont have
prolonged exposure to it till you can assess it's radiation status, and keep
women and children away totally till you know.
Jim