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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Sat Jun 22, 2013 2:45 am Post subject: Crt projector with 12 inch tubes!!! |
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Has anybody seen as beast like this in person
Curt? Anyone
http://www.barco.com/en/Products-Solutions/Powerful-12-CRT-projector-with-unsurpassed-brightness.aspx
I knew of projection tvs with tubes this size but a projector that would be a sight to behold 
I would bet a beast this size would be next to impossible to move   but the set probably could handle and resolve any resolution you can throw at it
Let me know if the link doesn't work
Edit I hit the 3 instead of the 2(doh)
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crt king of black
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sat Jun 22, 2013 3:52 am Post subject: |
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There is a few sets that have 12" tubes, i dont know how good the Panasonic is, but the 812 has been said to be less sharp than a top end 9", where as the Reality 912 is apparently an improvement over the 909. The 912 is 150 Kgs, and is essentially the same electrically as a Reality 909 but with 9" high resolution tubes.
Have a search around, the Panasonic was listed on here a couple years ago.
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Sat Jun 22, 2013 4:36 am Post subject: |
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| CasetheCorvetteman wrote: | There is a few sets that have 12" tubes, i dont know how good the Panasonic is, but the 812 has been said to be less sharp than a top end 9", where as the Reality 912 is apparently an improvement over the 909. The 912 is 150 Kgs, and is essentially the same electrically as a Reality 909 but with 9" high resolution tubes.
Have a search around, the Panasonic was listed on here a couple years ago. |
I have tried the search feature of the forum but I don't think it works(but will try it again)I would like to see pics of it since my online search(google) didn't bring up it in the results
I think the resion the Panasonic has the edge over the barco is because they made the set and the tubes(like nec and Sony)those Panasonic tubes have great sharpness(the samsung tv I have has the p16 tubes which are 7inch though the raster may be bigger then others not sure but when i pulled the old red tube the wear was close to the edge of the tube)
Here I thought my set was king of the heap(contrast ratio wise)having 9inch tubes(which I have figured out most of the features so far just need to set the date(which needs setting as it shows 00/random day/00))
I didn't know 12 inch projectors was made since curts rating chart only shows 9 inch tubes as being the largest size(I have seen the there was projection tvs with up to 13inch tubes not that I would want to lift or move such a beast)
Case I got your pm but haven't had the chance to read it fully(been busy)
Still on the fence on doing the soler setup for my work building considering the main breaker is 15 amp(1500 watts max) but I have to figure up my total watts useage to see if I need a bigger box or not(its a small box with a main the three breakers but my building is not huge but I want to make sure it can handle my ac and everything else)
But I am just preparing to wire it up for electricity now so I am seeing what my options are before I do(hence why I mentioned the battery bank before)
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crt king of black
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Phoenixed
Joined: 13 Oct 2011
Posts: 514
Location: The mitten
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| Posted: Sat Jun 22, 2013 5:28 am Post subject: |
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To aid in your search include terms like "AND" for instance.
Sony AND G90
I use them in place of a space. As confusing as that sounds.
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Planar PD-8150/Runco LS-5
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Sat Jun 22, 2013 5:31 am Post subject: |
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| Phoenixed wrote: | To aid in your search include terms like "AND" for instance.
Sony AND G90 |
Ok I will try that next time I do the search
I would like to see a screen shot of one these beast in action from a high quality camera
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crt king of black
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CasetheCorvetteman
Joined: 09 Nov 2008
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Location: Australia
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| Posted: Sat Jun 22, 2013 6:16 am Post subject: |
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The Panasonic did not have the edge over the 912, maybe the 812, but not the 912. The tubes used were all Panasonic.
P16s are 8" tubes, NEC and Sony used them in their later sets, as did Barco.
The 10PG is rated 17,000:1 CR in the specs on this site, where as the G90 is listed as 30,000:1 ( didnt look at the rest. )
Start a thread in off topic for the solar if you like, itll be easier for me to keep it all in separate threads!! 
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sat Jun 22, 2013 7:58 am Post subject: |
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Begs the question though, who set it up and how much could it be improved over the setup they all saw?
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CasetheCorvetteman
Joined: 09 Nov 2008
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Location: Australia
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| Posted: Sat Jun 22, 2013 8:13 am Post subject: |
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If those tubes went in with the same neck size as the P19s I wonder how much trouble it would be to get them into a G90? Obviously they wont fit, but that is not an issue.
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ElTopo
Joined: 07 Nov 2006
Posts: 1640
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| Posted: Sat Jun 22, 2013 9:14 am Post subject: |
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Same specs as the BR909.
I think sharpness with 12 inch tubes can only be achived beyond 1080p and good optics.
ElTopo
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barclay66
Joined: 27 Jun 2011
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Location: Germany
TV/Projector: Marquee 9500 Ultra
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ElTopo
Joined: 07 Nov 2006
Posts: 1640
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| Posted: Sat Jun 22, 2013 9:20 am Post subject: |
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The 12’’ CRT tubes offer a phosphor area nearly twice as large as the 9” tubes. As adjacent pixels have less overlapping,
performance, both in resolution and light output, ever achieved by CRT projectors.
Check this out:
http://www.curtpalme.com/docs/BarcoReality912_Brochure.pdf
Page 2 shows the raster size. 1080p on this projector is like watching VHS quality.
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CasetheCorvetteman
Joined: 09 Nov 2008
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Location: Australia
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| Posted: Sat Jun 22, 2013 9:36 am Post subject: |
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http://www.avsforum.com/t/1158791/does-anybody-know-this-monster-ikegami-tpp-1600
And read here from an 812 owner.
http://www.avsforum.com/t/206521/ultimate-crt-projector-812-912-barco-12-crts
| ElTopo wrote: | The 12’’ CRT tubes offer a phosphor area nearly twice as large as the 9” tubes. As adjacent pixels have less overlapping,
performance, both in resolution and light output, ever achieved by CRT projectors.
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Yes, and ive just done a ton of reading around the internet about the 912, and there were a small few that confirmed it was indeed razor sharp and extremely bright, they also stated that the 912 does not suffer the same lack of sharpness the 812 does.
Last edited by CasetheCorvetteman on Sat Jun 22, 2013 9:40 am; edited 1 time in total
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Sat Jun 22, 2013 9:36 am Post subject: |
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It is harder to maintain tight focus on a large tube as the electron beam has to travel much more, and then the astigmatism has more important role because the difference between the center and corners are becoming more apparent, so overall it is much harder. I think this is why the small P16 tubes are so sharp (that NEC used), maybe sharper than anything else out there, but the small phosphor size limiting it's performance...
On the other hand maybe the tube was designed intentionally to be not sharp, if the brightness was the main goal they only could achieve that with hitting the phosphor with a high energy AND large size electron beam, when these tubes were designed the 9" tubes already did the resolution what was more than enough for almost everything, so pursuing even better resolution wasn't a sensible idea.
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projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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CasetheCorvetteman
Joined: 09 Nov 2008
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Location: Australia
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| Posted: Sat Jun 22, 2013 9:46 am Post subject: |
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Gabor, that is not to say it cant be done. The circuitry in the Barco Reality projectors is pretty damn sophisticated.
Another thing to note on those tubes is the bell angle, it looks to be if anything a bit less than a standard 8' or 9' tube, meaning deflection angle wouldn't be much ( if any ) greater, and the beam should not hit the face at any more of an angle than on the smaller tubes.
Yes, the man is somewhat of a technical genius it seems.
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CasetheCorvetteman
Joined: 09 Nov 2008
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| Posted: Sat Jun 22, 2013 9:57 am Post subject: |
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And youll know if you've ever done the astig magnets on a PG plain where there is no dynamic adjustments, getting the corners even close to perfect on those tubes is like trying to sh** through a donut at 20 feet....
The 912 has some pretty serious digital astig control, quite possibly the best ever.
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gjaky
Joined: 05 Jun 2010
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| Posted: Sat Jun 22, 2013 10:04 am Post subject: |
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| CasetheCorvetteman wrote: | Gabor, that is not to say it cant be done. The circuitry in the Barco Reality projectors is pretty damn sophisticated.
Another thing to note on those tubes is the bell angle, it looks to be if anything a bit less than a standard 8' or 9' tube, meaning deflection angle wouldn't be much ( if any ) greater, and the beam should not hit the face at any more of an angle than on the smaller tubes. |
But still the electron beam has lot more to travel affter the focusing coils, it's pretty much like with every focusing technique: the longer way has the ray travvel the harder to keep its tight focus.
If you compare the different kinds of pjs, you'll see that sets with the same tubes performing pretty much the same (regarding focus), it is usually not the electronics that are limiting the focus, more likely the the tubes themselfs.
But this is only my opinion.
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projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sat Jun 22, 2013 10:11 am Post subject: |
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The XG focus is superior to the PG XTRA though, and the tubes are longer. The focus and astig are both better, yet the tubes are very near the same, apart from the length. The bell on a P16 is quite a short one compared to some of the 8' Sony tubes, yet their focus was not as good. The sharper the angle of the bell, the more of an angle the beam will hit the phosphor in the corners, requiring substantially better electronic correction to get the beam spot round in the corners.
That is my take on it all, the factors are somewhat complex, but looking at what is presented before us, those 12 " tubes don't look to be much longer than a P19.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sat Jun 22, 2013 10:19 am Post subject: |
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With the 12" tube face being said by the brochure to be almost twice the surface area, the spot size could still be almost twice as large and resolving capacity should still be the same. I wouldn't think it would be impossible, I can display extremely clear 1920x1440 on my 17" ES focusing monitor.
If I could pick up an 812 ( if I was that strong  ) it would make a PERFECT gaming projector for large screen gun games with that extreme brightness!!
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Sat Jun 22, 2013 10:55 am Post subject: |
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As with most things there is usually some trade off.
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