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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Tue Sep 15, 2009 6:40 pm Post subject: Crystals in Marquee LC chamber |
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so I recently potted a LUG in MArquee housing with a brand new bellow. Had everything as clean as possible before hand, used new Techspray CRT coolant. Tube has been sitting in a machine for a couple of months. I fired it up and looked through the lenses to see "stuff" on the C-element. with lens off it looks like crystals, white and randonly scattered in little pockest with the largest one top.
Any idea's WTF this could be? 
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PaulB
Joined: 26 Oct 2007
Posts: 359
Location: Bonnie (but rainy) Scotland
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| Posted: Tue Sep 15, 2009 7:31 pm Post subject: |
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Not the usual aluminium reaction blobs from the filler holes but something different?
Any pictures?
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Paul
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Tue Sep 15, 2009 8:08 pm Post subject: |
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| PaulB wrote: | Not the usual aluminium reaction blobs from the filler holes but something different?
Any pictures? |
no, it's not blobs or cloudiness. theyre actually little crystals, look like snow flakes or fiberglass. I've never seen this before. the Obvious fix is to drain, clean, and re-fill but I would like ot know how & why so it doesn't happen again.
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Wed Sep 16, 2009 3:07 am Post subject: |
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| Nashou66 wrote: | Do the look like small salt granules? I have had those in the one chamber that had the anodizing wear off in a few spots. I bet its a reaction with the aluminum.
Athanasios |
yes they do but the anodize was fine in this one. I didn't see any bare spots and I didn't scratch or gouge the metal during the process. Any suggestions on a fix?
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Wed Sep 16, 2009 3:26 am Post subject: |
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Not sure what caused mine either then I assumed it was the aluminum. I wonder if any impurities were in the glycol we used? I think there is an additive we could add to the glycol for anti fungal growth, thats what i assume the crystal like deposits are, no? maybe we could boil the glycol to make sure its clean? I have no idea, clean up the chamber with distilled water or denatured alcohol next time, and make sure no dust at all gets in there.
Athanasios
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1031
Joined: 22 Mar 2006
Posts: 657
Location: Finland
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Wed Sep 16, 2009 9:13 pm Post subject: |
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| 1031 wrote: | Edit: pictures
Does this look similar? If it looks, its then bye bye to that C-element |
no I don't think so? I had a C-element that looked like it was starting t odo that but what I have now actually looks like particles on the surface. I will take the tube out tonight and shake it, if the stuff is loose and settles to the bottom then I will be fine with that. I'l ltry and take a pic.
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