| Author |
Message |
rivenga
Joined: 13 Jul 2011
Posts: 6
|
| Posted: Fri Jul 22, 2011 8:34 am Post subject: Regeneration tubes ? |
|
|
Hello again
In my country, I found the companies offering the regeneration of the CRT picture tubes (TV), and the lamps of LCD and DLP projectors.
Maybe someone knows if there is a possibility restoration of lamps CRT projectors?
_________________
DLP projector : Optoma HD200x (1080p) + Optoma panoview 92" = yeahh
CRT projector : wanted!
|
|
| Back to top |
|
 |
Tom.W
Joined: 09 Mar 2006
Posts: 6635
|
| Posted: Fri Jul 22, 2011 9:15 am Post subject: |
|
|
|
That's kind of a maybe. The Sencore CR7000 can sometimes clear a fault but if the tubes have low emissions it may or may not work...
|
|
| Back to top |
|
|
CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
|
| Posted: Fri Jul 22, 2011 9:19 am Post subject: |
|
|
|
How will it repair the phosphor coating? You need to open up the tube for that.
|
|
| Back to top |
|
|
Tom.W
Joined: 09 Mar 2006
Posts: 6635
|
| Posted: Fri Jul 22, 2011 9:24 am Post subject: |
|
|
|
It doesn't.
|
|
| Back to top |
|
|
CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
|
| Posted: Fri Jul 22, 2011 10:19 am Post subject: |
|
|
I know that, its obvious 
|
|
| Back to top |
|
|
TheVerge
Joined: 19 Jul 2009
Posts: 928
|
| Posted: Fri Jul 22, 2011 2:01 pm Post subject: |
|
|
You guys sure he doesn't mean rebuild like vdc?
I'm assuming english isn't his first language.
|
|
| Back to top |
|
|
barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
|
| Posted: Fri Jul 22, 2011 3:56 pm Post subject: |
|
|
Hi,
I think that his "error" comes from ignoring that a tube has two parts which contribute to the production of an image. First there is the tube's system which will emit the electron beam and second there is the phosphor coating at the inside of the faceplate which, as being hit by the electron beam, will emit light.
On regular CRT TV sets aging mostly occurs at the system as the heated cathode will emit less electrons over time or where cathode to grid shorts may produce. This type of aging can partially be cured by controlled arcing between the system's cathode and grids. The spark will burn away some of the cathode's surface and thereby uncover fresh parts which may emit more electrons. Everyone can imagine that this method has its risks. Same applies to curing shorts.
All of these system related procedures are commonly named "Tube Regeneration".
Interestingly on CRT TVs the degradation of the tube's phosphor is quite a rare phenomenon (except phosphor burn like on arcade monitors) because beam intensity is quite low.
Well, projection tubes most commonly age the other way round. The tube's phosphor will mostly show signs of wear long before the system's emission gets intolerably low. Reuse of such tubes is only possible if the phosphor coating gets replaced. This delicate procedure (needs the tube to be opened and sealed again) is mainly referred as to "Rebuilding or Recoating Tubes".
Regenerating a projection tube will therefore make little sense.
And no, I'm not a native English speaking person either...
Regards,
barclay66
|
|
| Back to top |
|
|
PetGeek
Guest
|
| Posted: Fri Jul 22, 2011 5:45 pm Post subject: |
|
|
|
That's way too much to do...
|
|
| Back to top |
|
|
|
|
