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drice1234
Joined: 07 Oct 2006
Posts: 1309
Location: Allen, Texas
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| Posted: Thu Oct 18, 2007 4:12 pm Post subject: Viewing tube wear |
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I have removed the lens from a Barco 1209 to view the tube wear. They look to be in great shape with no visible wear. I am curious if I am really seeing everything as I am viewing through the glycol in front of the tubes. Does this tend to hide the wear area? Is there a better method to view the tubes without tearing the pj apart?
Thanks
Dan
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Ile
Joined: 09 Mar 2006
Posts: 1491
Location: Jyväskylä, Finland
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| Posted: Thu Oct 18, 2007 6:24 pm Post subject: |
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Glycol hide very light wear, so tubes are about 9 if you can't see nothing.
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Spotmatic
Joined: 29 Jun 2006
Posts: 531
Location: Gelderland, Netherlands
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| Posted: Thu Oct 18, 2007 6:39 pm Post subject: |
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Who cares, Dan? After all, you SUCK! 
(BTW, if you decide to part out one of the VS-1281's, please let me know. A friend of mine has one in very good shape but it stopped working after he had a power outage).
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Ile
Joined: 09 Mar 2006
Posts: 1491
Location: Jyväskylä, Finland
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| Posted: Thu Oct 18, 2007 6:45 pm Post subject: |
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| Spotmatic wrote: | | A friend of mine has one in very good shape but it stopped working after he had a power outage). |
My friend had same problem once. Is there even standby led on?
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drice1234
Joined: 07 Oct 2006
Posts: 1309
Location: Allen, Texas
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| Posted: Thu Oct 18, 2007 7:10 pm Post subject: |
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There is a good chance that I will be parting out one of the 1271's. When I did my quick power up, one of the units only had the blue tube come on. I am going to be concentrating of getting the 1209 going as the Barco 808 has power issues and toasty tubes and the Ampro 4300 has toasty tubes as well. I can hopefully either barter or sell enough parts off of these units along with the Mitsubishis to get the 1209 going as it appears to have good tubes.
Thanks
Dan
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Thu Nov 08, 2007 1:04 am Post subject: |
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Wear on a blue tube that's not visible to the naked eye under normal lighting CAN be made very visible if you illuminate the CRT face with
a blacklight. Even a UV LED will suffice.
It doesn't work on red or green, though.
CJ
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Thu Nov 08, 2007 1:30 am Post subject: Re: Viewing tube wear |
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| drice1234 wrote: | I have removed the lens from a Barco 1209 to view the tube wear. They look to be in great shape with no visible wear. I am curious if I am really seeing everything as I am viewing through the glycol in front of the tubes. Does this tend to hide the wear area? Is there a better method to view the tubes without tearing the pj apart?
Thanks
Dan |
Hello
Fire it up pointed at a screen; white field with max height, max width settings. Staring at phosphor does not tell the condition; burn can be hard to detect unless running.
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Zebu Fellenz
Joined: 21 Dec 2006
Posts: 2567
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| Posted: Thu Nov 08, 2007 2:19 am Post subject: |
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| Quote: | Wear on a blue tube that's not visible to the naked eye under normal lighting CAN be made very visible if you illuminate the CRT face with
a blacklight. Even a UV LED will suffice.
It doesn't work on red or green, though. |
CJ,
Why does this only work on the blue tube, or are you saying that it only works on the blue tube if the projector is color filtered 
Thanks,
Erik
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