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huggy
Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia
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| Posted: Sat May 14, 2016 12:13 am Post subject: The stack is back! (was) |
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Well after a few months of single projector viewing and 4 quads later, I received a quad a couple of days ago from a forum member, wacked it in and the the beasts have been running fine for a day now.
What was different? Well I think ( just speculating here ) that the quad I received came out of an 808 and until a couple of weeks ago was in a running set, my previous quads ( even nos ones) were sitting in storage for god knows how long.
So it seems that the theory of either baking them before use or receiving them from running machines may be the key.
Its funny how you get used to one pj, to me it was fine and was saying to myself " Why did I even bother with a stack?" Well that all changed when I finally had both running and HOLY COW! AZIZ LIGHT!!!!! No going back now , brightness and punch is ridiculously addictive 
Dave
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Proud owner of stacked 909's on a 12 ft wide 16:9 screen.
Last edited by huggy on Sun May 22, 2016 7:43 am; edited 1 time in total
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Zolzar
Joined: 26 Jun 2009
Posts: 252
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| Posted: Sat May 14, 2016 1:15 am Post subject: |
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Nice!
If I could just find another low hour PG10 and a bigger house I would give this a shot.
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Sat May 14, 2016 1:37 am Post subject: |
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You're making me wonder if I can do a side by side stack on a pair of LUG equipped Marquee Ultras.
Shooting on my 8 foot wide screen, that image should really have some pop to it.
My room size makes a vertical stack impossible. But side by side? Maybe!
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Sat May 14, 2016 1:41 am Post subject: |
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Guys
I have set up several side stacks, in my shop a few times and for a customer locally. Geometry and convergence are pushed to limits, H lin especially. And those were on ten foot screen widths, you might run out of range on anything smaller.
I will always recommend edge blending over stacking; shorter throw and less stress on the electronics, if the budget can handle the cost of a processor. The least expensive single box solution I am aware of is Analog's SmartEdge 100, at about $6600
Last edited by Tim in Phoenix on Sat May 14, 2016 1:47 am; edited 1 time in total
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huggy
Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia
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| Posted: Sat May 14, 2016 1:43 am Post subject: |
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Mine is sided by side and screen is 12 ft wide. At 8 foot width it would be plasma bright 
Dave
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Proud owner of stacked 909's on a 12 ft wide 16:9 screen.
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garyfritz
Joined: 08 Apr 2006
Posts: 12088
Location: Fort Collins, CO
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| Posted: Sat May 14, 2016 2:34 am Post subject: |
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| cmjohnson wrote: | | You're making me wonder if I can do a side by side stack on a pair of LUG equipped Marquee Ultras. |
But gee CJ, where would you find the tubes for it ??? 
| Quote: | | My room size makes a vertical stack impossible. But side by side? Maybe! |
I thought I remembered hearing that Marquees couldn't do vertical stacks? Supposedly the electronics couldn't hack it. But you would think a vertical stack would be a lot easier than a horizontal...
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Sat May 14, 2016 2:42 am Post subject: |
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| garyfritz wrote: |
I thought I remembered hearing that Marquees couldn't do vertical stacks? Supposedly the electronics couldn't hack it. But you would think a vertical stack would be a lot easier than a horizontal... |
I have not tried a V stack but there should be plenty of range, H key and V lin being the adjustments most needed.
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Sat May 14, 2016 2:42 am Post subject: |
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Where would I find the tubes for it? Right on my own stock shelves. If I choose not to sell or trade off any of my current inventory I can put a set of perfect LUGs in not less than seven projectors.
But I only have six Marquees in my possession right now. Two need 8500 to 9500 upgrade hardware ( that should be done in a matter of days ) and one needs a new wiring harness because some IDIOT (not me) cut off a G2 lead on the wiring harness.
So I can, at this moment, only generate four running 9500LCs. Such a pity. To be restricted to only being able to do, at most,
an 8K capable 2x2 stack. I feel so positively downtrodden and impoverished. 
Oh, some of the lenses may not be quite up to standard, too. Working on that!
Now, how to actually feed signals to a 2x2 stack? I suppose it may be possible using my server/workstation with a pair
of GTX 295 video cards in it. That should be sufficient. With the appropriate software, of course.
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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ElTopo
Joined: 07 Nov 2006
Posts: 1640
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| Posted: Sat May 14, 2016 6:02 am Post subject: |
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_________________
Barco Cine 9 the one and only
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ElTopo
Joined: 07 Nov 2006
Posts: 1640
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| Posted: Sat May 14, 2016 5:45 pm Post subject: |
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817p@120Hz  
96kHz which is no prob at all.
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Barco Cine 9 the one and only
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ElTopo
Joined: 07 Nov 2006
Posts: 1640
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| Posted: Mon May 16, 2016 3:16 pm Post subject: |
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What movie is that ?
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Barco Cine 9 the one and only
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Mon May 16, 2016 3:37 pm Post subject: |
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I'm trying to figure out the minimum projector commitment for a blended 4K display. Not that I really have room for it.
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Mon May 16, 2016 3:53 pm Post subject: |
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Guys
In my experience, stacking is rather more of an alignment nightmare, and with a Marquee some adjustments are slammed to the limit. Stacking also means you are using as little as 56% of the tube faces, so I cannot imagine that being brighter than edge blending with 85-90% phosphor usage.
It's a free country, set up your rig how you please.
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ElTopo
Joined: 07 Nov 2006
Posts: 1640
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| Posted: Mon May 16, 2016 4:03 pm Post subject: |
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For me it would be a blend.
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Mon May 16, 2016 4:26 pm Post subject: |
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| garyfritz wrote: |
I thought I remembered hearing that Marquees couldn't do vertical stacks? Supposedly the electronics couldn't hack it. But you would think a vertical stack would be a lot easier than a horizontal... |
Gary you have that switched, they were designed to be vertically stacked, it's the horizontal that really pushes them to death.
If you look at ACON menu's there's a "converge stack" option and it was most definitely intended as an over/under arrangement. Not a problem in auditoriums.
For us it sucks unless your basement has 10 foot ceilings and even then , uggghhhh. If you thought one was ugly, ......
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Mon May 16, 2016 4:29 pm Post subject: |
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even the Vidikron case doesn't help much here , just Fugly, but look at the geometry Very little "out of whack". You'll be using a little extra keystone and that's it.
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Mon May 16, 2016 4:32 pm Post subject: |
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BTW, for all those people who are afraid to sit under one CRT, tranquilizers handed out at the door 
Last edited by draganm on Tue May 17, 2016 3:59 pm; edited 1 time in total
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ElTopo
Joined: 07 Nov 2006
Posts: 1640
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| Posted: Mon May 16, 2016 4:34 pm Post subject: |
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@Tim: What rez/refresh rate would you put into one projector ?
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Mon May 16, 2016 5:31 pm Post subject: |
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| draganm wrote: | even the Vidikron case doesn't help much here , just Fugly, but look at the geometry Very little "out of whack". You'll be using a little extra keystone and that's it.
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Pretty serious setup, nonetheless. Two Chris Stephens modded 9500s, Halcro DM38 amps, JmLabs Grand Utopias...there's some money in that room!
I'd love to do a 2x2 tile blend at 4K but I'd have to rent a space to do it in.
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