Homebrew PCBs

On Fri, 6 May 2005 14:57:54 -0400, Roy J. Tellason  
<rtellason@...> wrote:

>
>> Light bulbs contain inert gas at atmospheric pressure.
> I was of the impression that it was at somewhat lower than atmospheric
> pressure,  otherwise you wouldn't get that "pop" when they break.
>

It is lower than athm., put a propane torch against it and the softening  
glass will be pulled in.
(yes i am aware that experiment could have resulted in shattering hot  
shards and be beeing blind...)
There's Argon in there.

> The other
> reason it's that thick is because of lead in the glass to absorb  
> x-rays,  at
> least for color tubes,  which is what makes TV sets and monitors a bit
> "hazmat" rather than just being able to put 'em in the trash.  Monochrome
> monitors and old B&W tv sets don't have that issue.


Why is x-rays created, and why is it not beeing created in BW TVs?
Always wondered..

Hell this is getting OT.. maybe we should take it to E_101.

ST