The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
Subject: Re: X-Rays in the garage?
Organization: The Armory
X-Newsreader: trn 4.0-test69 (20 September 1998)
From: email@example.com (Richard Steven Walz)
Date: 05 Oct 2002 04:13:14 GMT
In article ,
>On 3 Oct 2002 03:57:25 -0700, firstname.lastname@example.org (N. Thornton),
>masquerading as a MSNBC reporter, said the following to White House
>press secretary Ari Fleisher during a press conference concerning the
>>>How long a period would I have to
>>>coat it? I can just see myself with a hammer in one hand busting
>>>glass away and spray enamel in the other hehe.
>>I think it would be like that, tens of seconds I would imagine, don't
>>truly know though. Nothing to lose if you've got a dead one. Course I
>>dont know if there would be a reaction with the paint either...
>>How about fluorescent tubes? Wouldn't need to devac them. Would they
>Unsure... But it's certainly worth a try eh?
>>>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
>>I presume so. Your face plate glass would absorb some of them of
>>course. I don't know just what a CRT could take i and V wise, or the
>>glass thermally. I expect plenty more V but not i, you'd need to put
>>some significant neg bias on the grid to control i. That can be done
>>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.
>>>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.
>>>could be done, then it could maybe make a nice tight beam out the
>>>front end, thus allowing said nutcase to aim it at said seeds and
>>>from said self. Possible?
>>The x-rays would come out in all directions. Only the electron beam
>>would be a beam.
>Pisser. Buuuuut... I could use a lead shield with a hole to create a
>>>Shouldn't I be
>>>able to create a beam effect using simple aiming techniques, and
>>>failing that, shouldn't I just be able to operate the device in a
>>I think the lead box is your only aiming technique. Unless you know
>>some other you could practically use.
>>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?
>>>Does this also mean that 1/8" of lead is not a sufficient sheild for
>>>x-rays, and if so, then how can 1/2" of leaded glass be adequate in a
>>>CRT? I don't mean this critically, I want to understand this better.
>>Well, lead glass can be 24% PbO, so say ballpark figure 20% lead. The
>>xray emission from a TV tube is very low to start with, and the glass
>>will reduce it to legally accepted levels.
>>Every so much distance of lead will reduce the xrays by so many
>>percent: I don't know what the figure is offhand. So any lead will
>>help things, but to get down to background levels of radiation takes
>>an awful lot of lead. In practice you're unlikely to be able to encase
>>your experiement room in a foot of lead, or whatever it takes. So that
>>leaves you with long distances.
>>If you're going to do this you need to calculate and measure.
>>Irradiating yourself by mistake would be somewhat foolish.
>Agreed. If anyone can tell me what percentage of stoppage for a given
>thickness of lead I would really appreciate it!
>>A smoke alarm would be a far easier way to mutate seeds. Alpha
>>particles are of little danger IFF you keep far enough away from the
>>source, since they are absorbed travelling only short distances. On
>>the other hand, if you get up close they are much more harmful than
>>x-rays, as most x-rays pass though you uneventfully, whereas alphas
>>don't. Alphas are more mutagenic for that reason.
>>It should be possible to construct a metal chamber to allow you to
>>slide seeds in and out without exposing yourself to the alphas. Long
>>as you design corrcetly, no great risk there. Certainly be miles safer
>>than the sort of stuff you've proposed.
>>| | * | | With this you could drop seeds in and out
>>| | without any direct path from alphas to
>>| | yourself.
>>|__________| * is the alpha source.
>>I have to say, dont do any of the above, as there are real risks with
>>all of it. Unless you really know what youre doing, you could end up
>Mmmm. Well. As I said previously I'm really just tossing ideas around
>right now... A great deal more reasearch and planning will go into all
>of this before I make any sort of move. Thanks for all your help and
>have a great day!
> - NR
No, just use distance and some shielding. Activate it at a distance,
say in the garage if you're in the house. That's sufficient.
-Steve Walz email@example.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup