I'm doing a folded design, and I've run into a question that needs to be answered before I move on.

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http://www.lumenlab.com/forums/index.php?showtopic=24410

The problem here is that the light being used is the light coming out of the bottom of the bulb, so gravity will have the salts sitting on the bottom of the inner part, potentially in the light path and/or screwing up the colors. Anybody have an idea of what effect this might have on the image? Has anyone used a setup with the light path headed straight down out the the bulb, and can tell me if it had ill effects?

I remember someone a long time ago was grappling with the same question. I don't remember the result, but some creative searching might let you find that thread.

I would speculate that the salts will be vaporized so up, down, whatever probably doesn't matter much inside the arc chamber. Maybe when the bulb it first turned on it might be apparent though. --- I'm glad I said this was "speculation" it looks like it's wrong.

A lil info... http://www.lumenlab.com/forums/index.php?showtopic=13839

A random post I found on the topic... (click the quote link, maybe there's more info there...)

Elken2004 and I beleive Coldsteel found the salts settled under the arc causing discoloration and brightness loss when building vertical facing down. But search either member's topics to be sure from memory.

Perhaps you can try this:



Your fans will still go on the top of the projector.

It's a good idea, but the point of this design is mostly to save space front to back so it can be hung on a wall. The way your design is, I'd have to turn the lcd so the long side is the contributing factor in the depth of the box. Old design: 6" inner depth, new design: 9.7" inner depth. I'm not saying it's out of the question-- this is probably where I'll end up-- but it does reduce the cool factor slightly.

Any more suggestions? I don't want to add another mirror or any lexan heat shielding, because 3 mirrors already reduces the brightness enough.

Doh!

And I thought it was so simple - sheesh!

One other consideration is that you can have more "depth" if you make a square cut in the sheet rock, and slide the pj into the slot. It might give you the same look you are going for with a little more wiggle room in your design.

I don't think the company that owns my apartment would appreciate that.

Anyone else wanna weigh in?

Hehe ... not like they aren't going to charge you anyway, it'll just be for "imaginary" damage instead.

my roommate's cat has torn a 1 sq ft hole in the carpet under one of the doors, what's another 3 sq ft hole in the sheet rock gonna matter?

Just cover the hole up with pancake mix and tooth paste, your landloards will never know the difference!

Use a sheetrock saw and save the cutout. Then you can put it back, slather on the toothpaste in the groove. Been there done that.