29 Jan
2004
29 Jan
'04
12:46 p.m.
Hi
Ordinary glass glows a little redish yellow in a dark room,
when melted. Quartz glass if definitely white hot, when
melted. I don't think they are using quartz glass for neon
signs, though.
Dwight
From: "Teo Zenios" <teoz(a)neo.rr.com>
----- Original Message -----
From: "Joe R." <rigdonj(a)cfl.rr.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk(a)classiccmp.org>
Sent: Thursday, January 29, 2004 4:18 PM
Subject: RE: Voltage & Current..
I believe that they're AT LEAST 1 Amp ON THE 3kV SIDE! The neon sign
manufacturer's use them to step the 240 back up to 2 or 3 kV at 1 Amp to
burn the gasses out of the glass walls of tubes that they use to make neon
signs with. They run them at ~1 Amp for 24 hours and the tubes are almost
white hot.
Joe
Funny, All the glass/quarts tubes I have seen don't glow any color even when
melting.
At 12:02 PM 1/29/04 -0800, you wrote:
>> > I think perhaps it's best for Lyos to maintain his present beliefs
about
> voltage and current. Over time I'm sure
he'll collect more empirical
> data to either confirm or deny his hypothesis (though quite likely at
> some cost if he's as stubborn in his beliefs as I suspect the case to
> be).
On Thu, 29 Jan 2004, Gordon JC Pearce wrote:
In other words, blows himself up with a
3kV-to-240v electricity pole
transformer?
Would that damage the transformer? (how many amps are those?) 
29 Jan
29 Jan
12:50 p.m.
Ordinary glass glows a little redish yellow in a dark
room, when
melted.
Actually, come to think of it, what happens if you get ordinary glass
up to white heat? Does it just become a less viscous liquid, like most
liquids, or does anything interesting happen?
For that matter, what's the boiling point of glass?
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2:33 p.m.
I doubt that it's quartz glass because they have to be able to soften it
so that they can bend it. but I think it's close to quartz. I don't know
what caused the glow but they pull as hard of a vacuum on it as they can
while they bake it. I don't know if the white color is an arc inside the
tube or the tube itself.
You can make ordinary chemicalware glass glow red/orange with an alcohol
flame and a blowpipe. I used to make all my own lab ware.
Joe
At 03:46 PM 1/29/04 -0800, you wrote:
Hi
Ordinary glass glows a little redish yellow in a dark room,
when melted. Quartz glass if definitely white hot, when
melted. I don't think they are using quartz glass for neon
signs, though.
Dwight
From: "Teo Zenios"
<teoz(a)neo.rr.com>
----- Original Message -----
From: "Joe R." <rigdonj(a)cfl.rr.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk(a)classiccmp.org>
Sent: Thursday, January 29, 2004 4:18 PM
Subject: RE: Voltage & Current..
Funny, All the glass/quarts tubes I have seen don't glow any color even when
melting.
At 12:02 PM 1/29/04 -0800, you wrote:
>> > I think perhaps it's best for Lyos to maintain his present beliefs
about
> >
voltage and current. Over time I'm sure he'll collect more empirical
> > data to either confirm or deny his hypothesis (though quite likely at
> > some cost if he's as stubborn in his beliefs as I suspect the case to
> > be).
On Thu, 29 Jan 2004, Gordon JC Pearce wrote:
> In other words, blows himself up with a 3kV-to-240v electricity pole
> transformer?
Would that damage the transformer? (how many amps are those?)
I believe that they're AT LEAST 1 Amp ON THE 3kV SIDE! The neon sign
manufacturer's use them to step the 240 back up to 2 or 3 kV at 1 Amp to
burn the gasses out of the glass walls of tubes that they use to make neon
signs with. They run them at ~1 Amp for 24 hours and the tubes are almost
white hot.
Joe
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