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Cracked Glass

 
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Willie



Joined: 13 May 2006
Posts: 169
Location: Green Bay

Posted: Sat May 27, 2006 10:04 pm    Post subject: Cracked Glass

For those of you who don't get to other forum much I thought I'd post this Embarassed

http://www.sweetwilliampress.com/tubeface.jpg

Have a great weekend!

Willie
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Z-Photo



Joined: 07 Mar 2006
Posts: 2749
Location: Huntsville - Alabama

Posted: Sat May 27, 2006 11:09 pm    Post subject:

That is not a good sign....
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Engineer by Day
Photographer by Night
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The Only GOOD AMPRO - is a Dead AMPRO.
wait - are they not all DEAD already?
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jask



Joined: 17 Mar 2006
Posts: 10187
Location: kamloops BC

Posted: Sun May 28, 2006 1:35 am    Post subject:

Dammit thats an NEC!!! must go bleed my tubes.......
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Jim Shonk



Joined: 18 Mar 2006
Posts: 149
Location: Zanesville Ohio

Posted: Sun May 28, 2006 2:19 am    Post subject:

Just curious, what’s shrinking or expanding over time to increase the pressure? I know the glycol will expand with heat, but you would think if that’s all it is, this problem would occur shortly out of the box wouldn’t it?
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I like to focus Nakid
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Soapsuds



Joined: 01 May 2006
Posts: 42
Location: Canada, Mississauga

Posted: Sun May 28, 2006 4:58 am    Post subject:

Jim, Glycol is hydroscopic, (I think that's what it's called), and it absorbs moisture over time thus increasing the volume.
As long is there is any bubble visible, you are not at the breaking point Shocked

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Soapie
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wireburn



Joined: 02 May 2006
Posts: 76


Posted: Sun May 28, 2006 1:02 pm    Post subject:

Actually, it's hydrophilic or hygroscopic.

Yes, bleed those tubes, especially the P16's!!

-Mike
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kschmit2



Joined: 09 Mar 2006
Posts: 1141
Location: Heidelberg, Germany

Posted: Mon May 29, 2006 8:30 am    Post subject:

My AVS post re bleeding tubes:

Here are some quicktime files that show the bleeding process on an AC tube.

You will need Quicktime 7 or a current version of VLC to play them (h.264). They have no audio.

How to bleed a CRT tube (videos)

The file is hosted on Rapidshare. See instructions for downloading here:

A quick and painless step by step that explains how Rapidshare works and how to quickly download files from Rapidshare links.

Begin by simply clicking the link or by copying the link into your web browser.
Scroll down to the bottom of the page.
Press the FREE button to start the download.
Upon click the FREE button, a second, similar page will load.
Scroll down to the bottom of the second page.

Find the download counter; you must wait until the counter finishes before the download will begin.

After waiting for the counter to finish or by using the trick, a third page will appear.

Scroll down to the bottom of the third page.
The file name will appear with a code to begin the download. Enter the code exactly the way it is provided and click the link to begin the download. This will prompt you to save the file.

Kai
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fcoutinho



Joined: 19 Oct 2008
Posts: 5
Location: Brasil

Posted: Wed Nov 12, 2008 3:52 am    Post subject:

What if the glass chamber of the glycol is a normal glass that can be bought in any store? (My broken when doing the cleaning of fungi)
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Filipe Coutinho
from Brasil
BarcoVision 708
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perisoft



Joined: 29 Aug 2007
Posts: 2920
Location: Ithaca, NY

Posted: Wed Nov 12, 2008 4:58 am    Post subject:

Fix it with an Avisynth inverse map. Wink
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AnalogRocks
Forum Moderator


Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada

TV/Projector: Sony 1252Q, AMPRO 4000G

Posted: Wed Nov 12, 2008 5:31 am    Post subject:

LOL you nut!
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kschmit2



Joined: 09 Mar 2006
Posts: 1141
Location: Heidelberg, Germany

Posted: Wed Nov 12, 2008 10:08 am    Post subject:

I also have a tube with broken glass on my bench atm Smile

I really should have known better, since the tube bleeding tutorial is my own work, haha.

The tube was sitting on a shelf, and not installed in a PJ, so it's not really a big deal.
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