2 Jul
2016
2 Jul
'16
10:40 a.m.
I suspect the warning about arcing was that it could damage the regulator.
The voltage would increase, increasing the Xray level.
Depending on the metal being hit by electrons, it take a minimum level
before Xray emission starts. As I recall, the regulator on a color TV
was intended to keep it below that threshold.
Dwight
________________________________
From: cctalk <cctalk-bounces at classiccmp.org> on behalf of drlegendre .
<drlegendre at gmail.com>
Sent: Friday, July 1, 2016 6:27:27 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: Running CRTs without implosion protection glass
" I do remember
reading that the EHT rectifier diode valves and shunt stabiliser triodes in
early
colour TVs gave off enough Xrays to be dangerous"
This is true. I have here an old HV octal-base tube rectifier that came out
of a color set. The vacuum envelope itself is encased in a second outer
envelope, which seems to be made of something like 3/16" lead. The outer
envelope carries multiple warnings about x-ray emissions, and instructs you
to avoid arcing the anode to the case, or causing any other sort of
mechanical shock or damage as it may reduce the x-ray safety.
Of the countless thousands of tubes I've sorted, this is the only one I've
ever come across.
On Fri, Jul 1, 2016 at 3:40 PM, Toby Thain <toby at telegraphics.com.au> wrote:
On 2016-07-01 4:08 PM, Fred Cisin wrote:
Not a very good comparison because one is pointed
at your head for
Granted. But this is all well studied, we can just look up the numbers and
the science. Probably something people using unshielded CRTs are best
motivated to do.
--Toby
months or years and the latter is momentary.
On Fri, 1 Jul 2016, tony duell wrote:
I am not convinced that the effect is purely cumulative anyway. In other
words,
a lower intensity (and lower energy) beam for longer might not do as
much damage as a brief pulse from a high intensity, high energy source.
The "pro-nuclear" community calls it
the "LNT" ("Linear No Threshold")
premise.
How much of the health damage of early color TV was due, not to the
hardware, but to the quality of the content?
(USA networks were/are clearly worse than BBC)