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-boun...@classiccmp.org> on behalf of drlegendre . <drlegen...@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 <t...@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 >>> 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. >> > > > 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 > > > > > >> 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) >> >> >> >> >> >