Re: X-rays from light bulbs/Tesla Coils

And, the xray hazard from old color TV's wasn't from the picture tube, but
was from the HV rectifier in the 2nd Anode power supply.  These tubes are
available in two forms (with the same part number, of course) one with a
lead glass envelope, the other not. Apparently, they are distinguishable by
their weight.  I seem to recall an article in "the Bell Jar"
(http://www.tiac-dot-net/users/shansen/belljar/ ) talked about it, and had some

> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Re: X-rays from light bulbs/Tesla Coils
> Date: Friday, September 10, 1999 4:36 PM
> Original Poster: "Mad Mike" <mglass-at-netusa1-dot-net> 
> CRTs are manufactured using leaded glass to purposely sheild the TV
> from x-rays which are produced in picture tubes in fairly large quanities
> and not by the cold cathode method either. However, CRTs are usually
> at 25 to 27 kv. If one were to run the voltage up to say 50 kv or more
> probably would get some usable x-rays. If you could find a CRT out of an
> set that was manufactured back in the late 40s or early 50s I'm sure it
> would really cook. But I think I would advise against it. CRTs have
> flashing plus other metal coatings all over the inside, using the methods
> far discussed I think you could get x-rays coming out from the sides as
> as the front, in fact,  probably more from the sides because the glass is
> much thinner on the "funnel". Also, here is something to think about, If
> were to cut a leaded glass picture tube apart you could  use the cap
> as a flouroscope screen I think but I wouldn't recommend it.
> Mike KB9NZQ ( senior technician in the largest CRT factory under one roof
> the world)