Paul B. said

>  Ah, now we're getting a bit into science fiction!  By the time you set
>up a manufacturing facility to re-construct your "vacuum tube" into an
>X-ray tube, it is hardly a backyard enterprise.
===========
Not really. There are some vacuum tubes out there that will make exrays
if you put enough voltage on them.
>
>  An X-ray tube consists of an electron gun similar to that in a CRT
>(TV, oscilloscope) *except* that it generates from five (dental, II) to
>200 times the beam current, focussed onto an oblique tungsten anode such
>that all the X-rays come out *in one direction*.  The problem with
>X-ray emission from TV tubes and the old EHT shunt regulators is that it
>comes out *all over the place*!
=============
Soft X-rays are easily contained by steal, concrete, soil water or what have
you.
>
>> If any one thinks it is sound I can probably set up a trial.
>
>  Have I made my point?
----------
Not to me. If I try it I will be sure to check it for leakeage with film
badges.
Anyone that can develop film can do that. I am a great deal more concerned
about the high voltage supply than I am the X-ray danger.

Gordon

Gordon Couger gcouger@rfdata.net
624 Cheyenne
Stillwater, OK 74075
405 624-2855   GMT -6:00
>
>  Let me give you a suggestion.  If you want to try it with your
>dentist, use the absolute *lowest* anode voltage to which the machine
>can be set.  Whenever this discussion comes up, people start talking
>about using industrial x-ray machines and the like, set up for
>ridiculously high anode voltages.  It seems not to be intuitive to them
>that "hard" X-rays which simply travel straight through the plastic
>package, silicon die, object holding the chip, the table, the floor and
>just keep on going have *no* effect erasing a chip!
>
>  Cheers,
> Paul B.
>
>