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From: email@example.com (N. Thornton)
Subject: Re: X-Rays in the garage?
Date: 4 Oct 2002 03:29:40 -0700
NNTP-Posting-Date: 4 Oct 2002 10:29:40 GMT
NightRunner wrote in message news:
> On 3 Oct 2002 03:57:25 -0700, firstname.lastname@example.org (N. Thornton),
> >>Last question on the CRT issue... Could one make a haphazard sweep
> >>generator just enough to make a quarter sized spot in the middle of
> >>the screen, and then drive the sucker to holy hell and get a weak
> >>of xrays?
> >by grounding the control grid and using a cathode resistor. And I
> >would take cover in case the glass spot heating caused it to explode
> Well... If I do try that method I will likely run it wayyyyy hard out
> on the driveway cement. That way, if it's going to go blammo, it can
> do it's damage to the trees.
And every animal that crosses the soil round your driveway for the
next 5 years. And the neighbours cat who was watching at the time.
Smoke detector might make more sense.
> >>What might happen if you drove it so hard that it burnt a
> >>hole in the phosphor... Would it still potentially emit radiation, or
> >>does the burning destruction also extend to the screen mesh?
> >The shadwmask is metal sheet, the phosphor is powder on glass, so I
> >think the shadowmask 'd take a lot more hammering than the phosphor.
> Huh... I thought it was a wire mesh. Once when I was a kid I detonated
> a mini bomb inside the back of a 12" BW tv and could have sworn it was
> a mesh that I found in the scattered remains. Hehe.
Well I wasnt thinking in terms of distinguishing between the 2 when I
wrote that, same difference. But BW TVs dont have shadowmasks, so,
expanded earthing braid? RFI screen?
> >And lead lining and distance will be your only radiation reduction
> >techniques too. I almost got the feeling from what you just said you
> >might be considering operating without lead shielding - I am wrong,
> Well.. What I was getting at is alot of the responses have suggested
> lead lined rooms and lead bodysuits... I figure it would be a great
> deal easier and cost effective to simply build a lead enclosure to
> house the project than try to plate the whole garage. That way I could
> manage six 1/4" to 1/2" lead plates of just big enough size and
> actually afford to do it. BTW... Does anyone know of a good,
> reasonably cheap source of lead for such things?
Yup. Cheapest lead source I know is scrap car batteries. Here they're
free in quantity. The remaining acid and lead salts can be put back in
the battery cases and remaining batts responsibly disposed of at any
Just be carful about the melting casting process, batteries contain a
lot of lead salts which are somewhat toxic.
Roofing sheet lead is the other source, much cleaner and easier, but
would cost more for your project. If you do the smoke alarm version
you wont need any lead sheet. Any thick metal will do it, and you'd
need very little.
Concrete is actually a good option. You need several times the
thickeness, but it is much cheaper and non toxic. Just make a
makeshift wood frame and pour it in. Concrete is used in nuke plants.
Don't do any of the above, its all dangerous.
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