my friend claims a faulty CRT shocked him in the nads

  • Thread starter Thread starter Lucas Tam
  • Start date Start date
About ten years ago, I had one of those metalised helium balloons weighted
down so it just hung in the air, drifting with the tiny air currents. It
wasn't quite balanced, as it was very slowly falling. It approached the TV
(which I was watching) from the side and then seemed to get sucked in and
stuck in the middle of the screen. I got up to move it out of the way, and
as I reached out to grab the balloon I saw a big spark, heard a loud bang,
felt quite a shock, and the TV went to standby (but worked fine afterwards).

I don't /think/ that was supposed to happen :).

Alex
Click to expand...
Better be glad it wasn't hydrogen-filled or you would be 'toasty'...
 
George Kerby said:
Better be glad it wasn't hydrogen-filled or you would be 'toasty'...
Click to expand...
North Sea gas?
For given volume it will lift about 50% of what Helium can lift.
(This of course includes the weight of the balloon).
 
Roger said:
George Kerby writes
North Sea gas?
For given volume it will lift about 50% of what Helium can lift.
(This of course includes the weight of the balloon).
Click to expand...

I'm not familiar with "North Sea gas", but the weight of an H2
molecule is about half that of helium, and therefore hydrogen gas
should lift more than helium, not less, for a given volume.

R,
Tom Q.
 
Tom Quackenbush said:
I'm not familiar with "North Sea gas", but the weight of an H2
molecule is about half that of helium, and therefore hydrogen gas
should lift more than helium, not less, for a given volume. Sure it does, but not by much.
Click to expand...
North sea gas is mainly methane CH4.
 
Noozer said:
Ya, but what were you touching them with???
Click to expand...

Duh... hands of course, what did you think? I haven't come across any
one trying to shift these huge fellers on his genitals! They weigh a
few tons each!
In the office, with shoes on, btw.
 
"beav AT wn DoT com DoT au" <"beav AT wn DoT com DoT au"> wrote in message
| Ha! That's what you get for shifting a CRT that's still on. I'm led to
| believe this isn't a good idea because of the high-speed moving parts
| inside. Or something.
|
| --
| -Luke-

"high-speed moving parts"
What ???
 
DCA said:
"beav AT wn DoT com DoT au" <"beav AT wn DoT com DoT au"> wrote

| Ha! That's what you get for shifting a CRT that's still on.
| I'm led to believe this isn't a good idea because of the
| high-speed moving parts inside. Or something.

"high-speed moving parts"
What ???
Click to expand...

The parts are quite small, and are continuously bumping against
the faceplate in a vain effort to get at you. In the process they
injure themselves severely, go out in a blaze of glory, and this
even further inflames their pals.
 
George Kerby said:
Much like some in this ng.

You are mistaken about the two gases. Take a look at the Table of Elements,
OK?
Click to expand...
I've calculated for displacement, not just density.
Where did I go wrong?
 
"beav AT wn DoT com DoT au" <"beav AT wn DoT com DoT au"> wrote in message
| Ha! That's what you get for shifting a CRT that's still on. I'm led to
| believe this isn't a good idea because of the high-speed moving parts
| inside. Or something.
|
| --
| -Luke-

"high-speed moving parts"
What ???
Click to expand...

Th shutter on the camera we installed...... all the better to see you with
 
Now for the proper answer - sorry if the thick heads amongst us
don't understand............

A Cathode Ray Tube has a "Final Anode" connected to a 25 thousand
volt rail for the beam released from the "Cathode" to be attracted to
the phosphor. This high voltage needs to be regulated to prevent
fluctuations in width etc. Normally, capacitors are used but because of
high voltage levels etc they - can be large and expensive.

Now then - here comes the clever bit. Capacitors need what is called
a dielectric to separate the 2 "plates" Glass is perfect as a dialectic
so someone decided to coat the outer cone of the tube with graphite. This
coating combined with an internal coating form the almost perfect
dielectric "glass separator". As there will be very little "leakage" the 25
thousand volt "held" in the capacitor will be minute until a path is
provided - i.e. a human being. So yes you friend did experience a shock.
The available current is small and will quickly be soaked up. Similar
experiences can be experienced touching mains plug pins when switched off.
Its all about capacitance storing energy..

Regards

Peter
 
genitals! They weigh a
few tons each!
Click to expand...

elephantiasis? must be hard to get around!!!!!


DM said:
Ya, but what were you touching them with???
Click to expand...

Duh... hands of course, what did you think? I haven't come across any
one trying to shift these huge fellers on his > In the office, with[/QUOTE]
shoes on, btw.
 
beav said:
Ha! That's what you get for shifting a CRT that's still on. I'm led
to believe this isn't a good idea because of the high-speed moving
parts inside. Or something.
Click to expand...
-Luke-
If cars had advanced at the same rate as Micr0$oft technology, they'd be
flying by now.
But who wants a car that crashes 8 times a day?
Registered Linux User #345134
Click to expand...



Or something....

Nice sig you have there.
 
S.Heenan said:
Or something....

Nice sig you have there.
Click to expand...
Hey. If you're dumb enough to get zapped in the groin by a monitor,
you'll believe anything. It is, however, not a good idea to tip it on
it's side...

--
-Luke-
If cars had advanced at the same rate as Micr0$oft technology, they'd be
flying by now.
But who wants a car that crashes 8 times a day?
Registered Linux User #345134
 
beav said:
.... snip ...
Hey. If you're dumb enough to get zapped in the groin by a monitor,
you'll believe anything. It is, however, not a good idea to tip it
on it's side...
Click to expand...

The better monitors have covers on their electron buckets, so they
don't get spilled out when tipped. Of course if you took that off
to stir the beggars ....
 
JAD said:
genitals! They weigh a

elephantiasis? must be hard to get around!!!!!
Click to expand...

Nope man, the monitors were that heavy. They were 21" monsters which
could kill you if one fell on you.
 
On Sat, 17 Apr 2004 02:18:06 +0100, Roger Hunt
You can pull a ground to the High Voltage on the face of the tube
quite a few ways. For instance wet rag and if you are touching ground
like a floor grating then static will snap you....
JiJi
 
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