Hello, I have run my projector now in like 2months, and I dont think it's bright at all.

Here is my setup: http://www.lumenlab.com/forums/index.php?s...11536&st=20

I run 100" screen with a white sheet from mom =).


The picture looks good because i can not handle my bad camera, but look only the line in the middle should be black, not the others.
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If you look at this picture you se how much yellow (black) (maby not exaclty so much yellow but all most!) it is in my picture, this is a real problem for me, can i fix it with some mdfboard with the right color or is something wrong with my hardware? Or should i switch down to 80" ?
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first thing is we need more info, what are the distances between the lamp and rear fresnel, fresnel and LCD, etc....the projection looks slightly ummm pincushioned too(well, not sure if you call it pincushioning , but the sides look like they are bulging out slightly)...you're original pics look pretty good(in the link) have you changed anything around?

are your fresnels still straight? make sure they haven't bowed from the heat...

It's build after the standard messure's here on the forums The Lumenlab PRO DIY Projector Guide V.2.
It's the same strengths of the ligth all over the projectionimage.

The only thning I have changed is that I have a white sheet instead of a blue. Maby to much light is passing trought the white sheet?

One other problem I have is that the lamp is pulseing out brightness, u can se the light is shaking it is not stable. This problem I mailed to LL but he said to wait for a while and it will disappear, but I have waited 2mounth and it's still there!

Check your wiring - especially to and from the eBallast - it may be getting interrupted power if the wiring is faulty?

The wiring is correct. I have solder the cables from the eballast (that was on it) with the cabels that comes out from the Mogul Base. So wiring is ok.

What should I do? Get a new lamp or eballast?

My opinion is:

1) Bed Sheet makes a poor screen... unless you've done something to the back of the sheet, too much light is lost penetrating the screen. (can you confirm/deny this, please ? ... it would look like a reverse direct view screen when the sheet is viewed from behind)

2) I would certainly try a new lamp first. What lamp are you using now ? What reflector ?

cheers,
gs

I will test to do a homemade screen of mdf and paint.

The lamp is a t15 pulse strike lamp with the eballast and Pro Reflector. Maby the reflector has wrong angle? or something.

My lamp was unstable from the start, i burned it in for like 2-3hours in 3 times, is that bad? First time the lamp started directly, after the first inburn it tooked like 10-15min for it to start. The lamp does waves with the lamp, it is not stable. Maby if I get a new lamp? But it was wrong from the start, and I said that to admin, do I have any warranty? Or is it the eballast fault that the lamp is not stable?

One thing more, I have the projector roofmounted now, maby the gravity keystone dont work correct and takes away some light?
Sorry for my bad english

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This pic shows a fare amount of light passing through your screen and lighting the wall behind.

Mikyd: It’s called barrelling distortion.

What do you meen? How can you see that? If you meen the white things on the sheet? It's blank paper, just wanted to see the different when the light not could pass trought anything, but I dont thinkt it's any good picture on the blank paper neither.

This looks to me like light on the back wall. Or am I misinterpreting it?

DJ

And if these are the pieces of paper, they seem to be a little brighter compared to the cloth screen.

DJ

When I looked a closer look on the sheet, the light stayed on the sheet. So there is not light from the wall.

Hmm maby a new lamp would help?

I think that is the projection. The bright screen in front is an LCD or CRT.

Yes a crt, I just wanted you to se the differents with the light.

Oh.
Still the paper does look to be slightly better.

DJ

take the shots without crt,,, you are killing the pic,,,

the brightness of crt is overiding the projection.. and yes you need BOC block out cloth,,, commonly used and curtain backing for good screen projection..

It does sound a bit like a bad lamp, as long as you've let it burn for 1+ hours at a time, it should have enought time to reach a stable temperature. What orientation is your lamp ? I know a PS lamp I got from LL burned very well in the horizontal position, but not very well in the vertical position ("wandering arc") ... I think others had a similar problem with burning vertically. If you're using an eballast you can get a simple MH lamp from HD and see how that works... you won't be able to use the pro reflector, but you can see if your eballast is working properly... you will likely have to change the position of your lamp too.

Yes, if you can paint a section of MDF with Ultra Pure White - Flat, this will be much better than the bedsheet or a sheet of paper. Black out cloth is also a popular option for making a screen.

cheers,
gs

I remember that i burned in my lamp in vertical position, but the lamp was not stable then, it was pulsing out light the inburn was 2hours. It was the same result in horizontal position that I have it now.


http://www.homedepot.com I can't find any there. And we don't have HD in Sweden
Maby I will buy the new lamp from LL does it fit with my black eballast? If it's the eballast I have a lamp over just in case the other crash.

I think the brightness was better for like 2mounths back in time, but then it was a blue sheet and the projector wasn't roof mounted. Maby some thing is wrong with the keystoning? I will look over my projector tomorrow for some tweaking.


EDIT:

I found a lamp here in Sweden. Will this fit in my mongul base?
http://www.ljusbutiken.nu/detaljer.asp?butik=90MT400-D

( I translated it)
Metalhalid pipe HLI-T 400W daylight E40
Artnr: 90MT400-D
259,00:- = 30$

Effect: 400W
Color: Clear/daylight
colortemp: 5900 K
Socket: E40
Ra Index: 90
Lightflow: 33000 Lm
Messure: 47x286



Or is this better:
http://www.ljusbutiken.nu/detaljer.asp?butik=8348330

Metalhalid pipe HPI-T 400W cold white E40
Artnr: 8348330
407,00:- = 36$
Horizontal brunposition +/- 20°

Effect: 400W
Color: Clear/cold white
Colortemp: 4300 K
Socket: E40
Ra Index: 65
Lightflow: 35000 Lm
Messure 47x286
Life length: 20.000 hours.

Wich one should I order to test with?

Either one will work, you can decide based on what color you're looking for. The 5900 will be closer to the lamp LL is currently selling (6500K), while the 4300 will be closer to the lamp you have now (T15 PS, 4000K). Both E39 and E40 should fit a mogul base. You're projection looked pretty good when you first got it going, but I see you always had the lamp problem... Although you never said what happened after you originally turned the lamp from horizontal to vertical ??

Certainly your setup could have something to do with it, take some pictures of your setup and we'll take a look.

cheers,
gs

I think I will ask the seller what differents the bulbs have and if I can burn lamp nr 1 in horizontal position.
But what is the differents on HPI-T and HLI-T bulbs? Because HPI-T cost twice so much,is't that it has a longer life ? Something more maby?

What sort of part of the projector would you want some pictures on?

EDIT

I tooked down the projector and tested it, and the image was more brighter and so on, and I changed the reflector little to. And for the start the bulb had a stable light, but after I moved the box it went unstable, to light is "pulsing" hmm I dont know why. But I hate it, hope it wont start again when I start it next time

And much light is stuck before the triplet, look at the picture.

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What should I do to fix this, I played with my bulb and moving it forwars and backwards but it didnt help.


roofmounted again.
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Here is the lamp in action.
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Here is from the wall.
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I would blame the ballast if it is an e-ballast. The old ones had a high failure rate.

Some of the pro refletors had the coating go bad too.

I would find a M59 coil ballast or a M135 ballast. ( I just happen th have a M135 ps for sale in the trading post)

You might want to read the thread on the HQI lamp thread in extream mods.
That lamp is not that much different than your T15. You should get a condenser lens too. The 6x9 on the condenser lent thread would be perfect.

Blame the eballast for what? It's working good but the lamp is unstable if you move the box. Why condenser lens?

The problem you are experiencing with the black lines blending together is called "black crush"....no doubt about it. You are one of the few people on the forums to take notice of it. To learn more see my thread HERE.