Re: strength of vacuum

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "RIAA/MPAA's Worst Nightmare" <mike.marcum-at-zoomtown-dot-com> 

So what would be considered unsafe/dangerous? Is there a chart somewhere
that gives a time exposure limit for so many rads (btw, what's a curie? I've
seen that unit used on smoke detectors)?

From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, November 02, 2003 3:54 PM
Subject: Re: strength of vacuum


 > Original poster: Bert Hickman <bert.hickman-at-aquila-dot-net>
 >
 > Antonio and all,
 >
 > I've found that some elongated lamps that are intended for scroll lamps do
 > indeed have a high vacuum instead of inert gas. The glass fluoresces a
 > brilliant yellow-green color, especially if the filament becomes
 > incandescent from field emission (with lots of electrons being emitted).
An
 > old antique light bulb I have does a similar thing, only the glass
 > fluoresces a brilliant blue color. In either case, I could easily detect
 > the presence of X-rays via a Geiger counter 8 feet away. Remember that
 > distance is your friend (inverse square law), keep run times down, or,
 > preferably, don't irradiate yourself at all... :^)
 >
 > Best regards,
 >
 > -- Bert --
 > --
 > --------------------------------------------------------------------
 > We specialize in UNIQUE items! Coins shrunk by Ultrastrong Fields,
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 >
 > Tesla list wrote:
 >
 > >Original poster: "Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br>
 > >Tesla list wrote:
 > >  > Original poster: John <fireba8104-at-yahoo-dot-com>
 > >  >
 > >  >   How many people do you think got more
 > >  >   than the recommended dose of rads in the last year while
 > >  > experimenting with standard vacuum light bulbs?
 > >"Normal" lamps don't have high vacuum inside, but are actually filled
 > >with an inert gas at low pressure. If in the experiments some corona
 > >or similar light appears inside the bulb, there is no problem. But
 > >if nothing appears, and worse, the glass fluoresces with a green
 > >light, this is sign of X-ray generation. Some small lamps are said
 > >to have high vacuum inside. I am not sure. Vacuum tubes certainly
 > >have (Humm... VTTCs may be dangerous...).
 > >Antonio Carlos M. de Queiroz
 > >
 > >.
 >
 >
 >
 >
 >