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Do I need a UV shield for these kinds of bulbs?

V

Victor Roberts

Jan 1, 1970
0
On Thu, 15 Mar 2007 23:59:03 +0200, "Ioannis"

[snip]
One additional critical factor would also be the UV transmission ability of
fused silica. Here's Clive's ozonizer, so the fact that it works, means that
the 184.9nm line is passing through the quartz tube:

http://www.emanator.demon.co.uk/bigclive/ozone.htm

Indeed, if you connect the burner in series with a 10-15 kOhm resistance so
that it operates in glow mode, ozone gets generated, so again, the quartz tube
is essentially transparent to the 184.9nm.

I am not sure how much of the lower radiation (< 184.9nm) will make it through
the quartz tube. It conceivably may, but then it will be absorbed by air, as
mentioned above.

Vic had given some links about the UV transmission curves for the quartz used
in discharge tubes long time ago, but I can't find them. I believe radiation
below 184.9nm will likely be close to the boundary of fused silica's ability
to pass UV through.

The web site that had this data seems to be gone, so I
posted a copy of the graph on my web site. See:

http://www.robertsresearchinc.com/misc/Quartz_Transmission.gif

--
Vic Roberts
http://www.RobertsResearchInc.com
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V

Victor Roberts

Jan 1, 1970
0
Hans - lurker, but with a beard

Send picture .....

--
Vic Roberts
http://www.RobertsResearchInc.com
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V

Victor Roberts

Jan 1, 1970
0
Oh Shit!
<photo now sent>

JB

And posted.

--
Vic Roberts
http://www.RobertsResearchInc.com
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V

Victor Roberts

Jan 1, 1970
0

Thanks --- But here seems to be a problem with the ftp
function for the web site and I have not been able to upload
your picture - or any other file for that matter. Hopefully
this will be fixed soon.

--
Vic Roberts
http://www.RobertsResearchInc.com
To reply via e-mail:
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This information is provided for educational purposes only.
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V

Victor Roberts

Jan 1, 1970
0
Thanks --- But here seems to be a problem with the ftp
function for the web site and I have not been able to upload
your picture - or any other file for that matter. Hopefully
this will be fixed soon.

The problem with my hosting company has been solved and your
photo is now posted. We now have 10!

--
Vic Roberts
http://www.RobertsResearchInc.com
To reply via e-mail:
replace xxx with vdr in the Reply to: address
or use e-mail address listed at the Web site.

This information is provided for educational purposes only.
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J

Jeff Waymouth

Jan 1, 1970
0
OK, OK, may your monitors "chip and shatter" (with apologies to Frank
Herbert)

Photo sent to Vic this evening

Jeff Waymouth
 
V

Victor Roberts

Jan 1, 1970
0
OK, OK, may your monitors "chip and shatter" (with apologies to Frank
Herbert)

Photo sent to Vic this evening

Jeff Waymouth

I got Jeff's photo, modified the main page, and uploaded it.
But when I went to upload Jeff's photo, the ftp function on
the site died again, as it did over the weekend. So, now I
have the new web page but no jpg of Jeff, so there is only
an empty frame where his photo should be :-(

The cflfacts.com is hosted by a new company I was testing.
Not the same one I use for my main site and they have failed
their first test!

To make matters worse, I'll be away from Wednesday noon
through Friday afternoon and will not have Internet access
during this time. So, if the ftp problem is not fixed by
tomorrow noon, I may not be able to upload Jeff's photo
until Friday.

--
Vic Roberts
http://www.RobertsResearchInc.com
To reply via e-mail:
replace xxx with vdr in the Reply to: address
or use e-mail address listed at the Web site.

This information is provided for educational purposes only.
It may not be used in any publication or posted on any Web
site without written permission.
 
V

Victor Roberts

Jan 1, 1970
0
I got Jeff's photo, modified the main page, and uploaded it.
But when I went to upload Jeff's photo, the ftp function on
the site died again, as it did over the weekend. So, now I
have the new web page but no jpg of Jeff, so there is only
an empty frame where his photo should be :-(

The cflfacts.com is hosted by a new company I was testing.
Not the same one I use for my main site and they have failed
their first test!

To make matters worse, I'll be away from Wednesday noon
through Friday afternoon and will not have Internet access
during this time. So, if the ftp problem is not fixed by
tomorrow noon, I may not be able to upload Jeff's photo
until Friday.

cflfacts.com still will not accept an ftp transfer. I've
therefore set up a clone of the gallery off my main web site
so all you folks can see Jeff. The new URL (until
cflfacts.com is fixed or moved) is
http://www.robertsresearchinc.com/gallery/

--
Vic Roberts
http://www.RobertsResearchInc.com
To reply via e-mail:
replace xxx with vdr in the Reply to: address
or use e-mail address listed at the Web site.

This information is provided for educational purposes only.
It may not be used in any publication or posted on any Web
site without written permission.
 
V

Victor Roberts

Jan 1, 1970
0
[snip]
cflfacts.com still will not accept an ftp transfer. I've
therefore set up a clone of the gallery off my main web site
so all you folks can see Jeff. The new URL (until
cflfacts.com is fixed or moved) is
http://www.robertsresearchinc.com/gallery/

Excellent! Thanks Vic. And nice to see Jeff, too!

But if cflfacts.com is so buggy, why don't you leave the gallery @
robertsresearchinc.com anyway?

I guess you already know this, so if you provide no direct link to the above
directory, nobody (except us here) would know about this directory, anyway.

Just an idea.

I might do that. But I still need to find a reliable host
for cflfacts.com.

--
Vic Roberts
http://www.RobertsResearchInc.com
To reply via e-mail:
replace xxx with vdr in the Reply to: address
or use e-mail address listed at the Web site.

This information is provided for educational purposes only.
It may not be used in any publication or posted on any Web
site without written permission.
 
V

Victor Roberts

Jan 1, 1970
0
[snip]
cflfacts.com still will not accept an ftp transfer. I've
therefore set up a clone of the gallery off my main web site
so all you folks can see Jeff. The new URL (until
cflfacts.com is fixed or moved) is
http://www.robertsresearchinc.com/gallery/

Excellent! Thanks Vic. And nice to see Jeff, too!

But if cflfacts.com is so buggy, why don't you leave the gallery @
robertsresearchinc.com anyway?

I guess you already know this, so if you provide no direct link to the above
directory, nobody (except us here) would know about this directory, anyway.

Just an idea.

I might do that. But I still need to find a reliable host
for cflfacts.com.

Both sites are working now.

I'll leave both up at least until I return on Friday.

--
Vic Roberts
http://www.RobertsResearchInc.com
To reply via e-mail:
replace xxx with vdr in the Reply to: address
or use e-mail address listed at the Web site.

This information is provided for educational purposes only.
It may not be used in any publication or posted on any Web
site without written permission.
 
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