You most likely wont be able to load the power supply into thinking it has the lamp attatched.....actually that would be a very very bad idea....a motor wouldnt work since a MH requires a high voltage to start it and then drops down.....it would most likely fry a motor if you found one.....and it would be noisy, you cant put a huge resistor in there....it would be wasted heat.....If you are reall, really comfortable....i mean do it at your own risk, you can see where onboard there is a relay that powers the lcd panel on. Once the ballast is underload (bulb) it most likely (if you say it has no photcells, etc) sends out a small voltage to a relay that powers up the lcd. good luck and be careful
Just read a few pages back that you were attempting HQI installation in these projectors.
Don't know if its been mentioned, but HQI (depending on manufacturer) can introduce a few UV problems. They have also been known to produce UV-C, which as you may know is not only unnatural (it is blocked by the o-zone) but it is also highly dangerous to humans in even small doses.
Just thought i'd mention it.
Im personally going to go with a 250watt double ended metal halide setup from www.lampman.co.uk
just about the right size 🙂
cya.
Don't know if its been mentioned, but HQI (depending on manufacturer) can introduce a few UV problems. They have also been known to produce UV-C, which as you may know is not only unnatural (it is blocked by the o-zone) but it is also highly dangerous to humans in even small doses.
Just thought i'd mention it.
Im personally going to go with a 250watt double ended metal halide setup from www.lampman.co.uk
just about the right size 🙂
cya.
I've temporatily given up on the MH installation while i enjoy my halogen install.......i'm looking at going into something MH soon as i get my SVGA projector a lens.....hopefully the motorized lens i bought on ebay can be adapted to fit
eebasist,
Are you trying to fit a bulb into your retail projector? If so, I might have a suggestion that just might work. I've been thinking of doing it myself but im not sure if the bulb would work this way.
It involves those big 250 - 450W MH bulbs the people are using as a light source on their home made projector. Would it be possible to (very carefully) pop the outside glass leaving just the actual bulb itself?
Would these lamps work without the outside glass? (i dont know) But if it were possible you would have a much smaller "light bulb" that you can fit in the projector without having to make a special box/reflector for it. You might even be able to use the stock reflector that your projector uses.
This might work, it might not. But if it does the replacements would be really cheap.
You might be able to remove the MH from that screw base and weld it to the frame.
Like i said, i've been thinking of doing it, i just dont know if the bulb would work if you were to remove it from the glass outside.
Just a thought
ap0the0sis
😀
Are you trying to fit a bulb into your retail projector? If so, I might have a suggestion that just might work. I've been thinking of doing it myself but im not sure if the bulb would work this way.
It involves those big 250 - 450W MH bulbs the people are using as a light source on their home made projector. Would it be possible to (very carefully) pop the outside glass leaving just the actual bulb itself?
Would these lamps work without the outside glass? (i dont know) But if it were possible you would have a much smaller "light bulb" that you can fit in the projector without having to make a special box/reflector for it. You might even be able to use the stock reflector that your projector uses.
This might work, it might not. But if it does the replacements would be really cheap.
You might be able to remove the MH from that screw base and weld it to the frame.
Like i said, i've been thinking of doing it, i just dont know if the bulb would work if you were to remove it from the glass outside.
Just a thought
ap0the0sis
😀
Attachments
Well the outer bulb jacket is what keeps the UV out. I like the idea....in fact i might try it.....but the UV is what scares me......anyone know where to get a glass UV filter?
maybe email the companys that sell these bulbs. Im sure someone must know where it can be found. I tired searching on google but came up with a bunch of camera filters. Your looking for a UV Filter plate.
ap0the0sis
ap0the0sis
check out this link:
http://www.knightoptical.co.uk/index.html
Wide range of usage
Low cost UV & IR absorbing filters
Repeatability
Available in four standard sizes (50x50/ 25x25/ 50dia/ 25dia)
They also custom make pieces to your needs...
ap0the0sis
http://www.knightoptical.co.uk/index.html
Wide range of usage
Low cost UV & IR absorbing filters
Repeatability
Available in four standard sizes (50x50/ 25x25/ 50dia/ 25dia)
They also custom make pieces to your needs...
ap0the0sis
Attachments
eebasist,
its 3:41 am my time and im half asleep but i just thought of something. You might not need a piece of UV filter glass. your projector should already have a piece of UV filter between the bulb and the LCD. When you buy or replace the lamp you dont have to buy a piece of UV filter glass to go with it, right?
My projector has it right after the first fresnel.. before the LCD. Its a glass with a dark tint on it.
so all you might have to do is work out how to mount the lamp and not worry about the UV. or just hand out UV glasses to everyone that is going to watch a movie at your house.... ha!
theres a bulb on ebay for my projector, it was at $32.00 till some @#$% placed a bid. now its at $76.00 🙁
ap0the0sis "yawn"
its 3:41 am my time and im half asleep but i just thought of something. You might not need a piece of UV filter glass. your projector should already have a piece of UV filter between the bulb and the LCD. When you buy or replace the lamp you dont have to buy a piece of UV filter glass to go with it, right?
My projector has it right after the first fresnel.. before the LCD. Its a glass with a dark tint on it.
so all you might have to do is work out how to mount the lamp and not worry about the UV. or just hand out UV glasses to everyone that is going to watch a movie at your house.... ha!
theres a bulb on ebay for my projector, it was at $32.00 till some @#$% placed a bid. now its at $76.00 🙁
ap0the0sis "yawn"
Hi Guys,
Be VERY careful about playing with these things like that.
The outer glass IS a UV filter - as is virtually ALL glass (even cheap sunglasses block UV). However, these bulbs use the glass for another reason - to reduce the effect of the inner bulb exploding.
The inner bulb operates at VERY high pressure and temperature.
They can and DO explode. MH light fittings for stage and photographic use often come unshielded, but require fittings that are safe against explosion AND fragments of red hot flying quartz silica glass that will spontaneously ignite most things they touch.
If you look at most OEM MH projector bulbs, they dispence with the outer bubble, but fully encase the inner bulb in a glass reflector with a glass front that can withstand an explosion...
Even when cold, they can explode - wear protective clothing if you DO play...
Bill.
Be VERY careful about playing with these things like that.
The outer glass IS a UV filter - as is virtually ALL glass (even cheap sunglasses block UV). However, these bulbs use the glass for another reason - to reduce the effect of the inner bulb exploding.
The inner bulb operates at VERY high pressure and temperature.
They can and DO explode. MH light fittings for stage and photographic use often come unshielded, but require fittings that are safe against explosion AND fragments of red hot flying quartz silica glass that will spontaneously ignite most things they touch.
If you look at most OEM MH projector bulbs, they dispence with the outer bubble, but fully encase the inner bulb in a glass reflector with a glass front that can withstand an explosion...
Even when cold, they can explode - wear protective clothing if you DO play...
Bill.
Bill,
Thats a very good point. care must be taken when trying thigs like this. However, i dont think he'l have a problem with the bulb expolding and hot glass flying all over the place because all retail projectors have a metal box that the lamp slides into. This is to prevent such explosions from spreading all over the place. If it were to expolde all he would have to do is clean the mess inside that metal box.
eebasist:
googles are a must... maybe even a nice thick piece of plexi-glass between you and the bulb and some heavy rubber gloves.
good luck and let me know if it works out. i'll be the next one to do it!
Try going to one of those glass houses and see if they have any UV glass, if you need it
ap0the0sis 😀
Thats a very good point. care must be taken when trying thigs like this. However, i dont think he'l have a problem with the bulb expolding and hot glass flying all over the place because all retail projectors have a metal box that the lamp slides into. This is to prevent such explosions from spreading all over the place. If it were to expolde all he would have to do is clean the mess inside that metal box.
eebasist:
googles are a must... maybe even a nice thick piece of plexi-glass between you and the bulb and some heavy rubber gloves.
good luck and let me know if it works out. i'll be the next one to do it!
Try going to one of those glass houses and see if they have any UV glass, if you need it
ap0the0sis 😀
Yeah, i know that i'll have to take great care in this.....but whats the worst that can happen i destroy a projector? Hell at this point it wont really matter much....time to get a piece of UV glass and something to protect the optics from explosion......i have to figure out something to mount the bare leads to now
Try some ceramic. I know there is a material sold at home depot called paris plaster. I'm just not sure if it would work. you might have a heat/fire issue with it. get some and apply heat to it, see if it burns or not.
Maybe use a piece of glass. i know there are drill bits that (with care) you can drill through glass (i've done it with regualr bits and holding the glass under water , takes forever tho).
epoxy?
cement?
metal frame with rubber inserts?
take some pics of your progress so that we know what not to do 😀
ap0the0sis
Maybe use a piece of glass. i know there are drill bits that (with care) you can drill through glass (i've done it with regualr bits and holding the glass under water , takes forever tho).
epoxy?
cement?
metal frame with rubber inserts?
take some pics of your progress so that we know what not to do 😀
ap0the0sis
ebay
dunno where else to get cheap ballast.
Would you still need a ballast even tho you were to match the new bulb to your lcd projector lamp. meaning, if your projector uses a 250W replacement lamp just use a 250W MH bulb. Or you think that would fry your power supply?
ap0the0sis 😀
dunno where else to get cheap ballast.
Would you still need a ballast even tho you were to match the new bulb to your lcd projector lamp. meaning, if your projector uses a 250W replacement lamp just use a 250W MH bulb. Or you think that would fry your power supply?
ap0the0sis 😀
I'm thinking that is a guaranteed way to fry the power supply......reason being that all MH bulbs don't run on a specific voltage, some at 55V, others 90, others higher still....odds of me picking the right one are next to none, and i dont want to take the chance of frying the power supply that powers the lcd.
I agree there is no point in frying a power supply. Although it would be cool there are several problems voltage as eebasist pointed out. Also if it ignites differently from a standard bulb cycling etc you could have problems. Play it safe and buy a seperate ballast.
yeah, i too agree... just throwing things up in the air.
However your going to have to fool your projector into thinking it has a bulb installed. It might be easy, like mine.... it uses a blue push pin to close the lamp circuit. If yours works this way then you shouldn't have any problems. If it doesn't then you'll have to somehow bridge the powersupply or find some way of controlling that high power start-up.
ap0the0sis
However your going to have to fool your projector into thinking it has a bulb installed. It might be easy, like mine.... it uses a blue push pin to close the lamp circuit. If yours works this way then you shouldn't have any problems. If it doesn't then you'll have to somehow bridge the powersupply or find some way of controlling that high power start-up.
ap0the0sis
I know i dont have any problem fooling it.....i shine a light in there and i see the lcd displaying the stuff, so at least thats not a big worry for me yet.......I have this somewhat on the backburner, I have to order a GY5.3 base for my other projector so i have at least one up and running, then i can concentrate on the others.
Something very strange indeed!
Alright I know i dont have a proper light source yet but was trying to figure out distance of fresnel and objective lens etc. So I started with a 125watt halogen flood light that puts out 2000 lumens. Little dim but then it is a flood light. So I went to Wall-Mart in search of the bulb everyone is talking about (65watt Fleux lights of america) but didnt find one. So I got a bulb for my shop light I needed. Well then it hit me-its a spot light bulb and halogen BUT its only 90watts🙁 and 1100 lumens! Its a GE Halogen Plus with a 10o beam...Said what the heck see what I get. Hooked it all up and its like 4x brighter than the twice as pwerfull light I had before. Which proves we are waisting alot of light. This spot light projects almost the exact size of my projected image, its like a perfect match! Looking at it and my regular tv (not projector)_ running its about half as bright as tv with lights on! Not great but Dang good for a 1000lumen bulb! I would be happy with that brightness there! By the way I'm only projeting a 4' image not 8-12' like you guys are. Anyhow, both are halogen- but the spot lights beam is too hot even a 90watt one at my lcd panel in norm. config. so I had to lengthen the distance to panel untill I got about 45C. I would like to keep it closer. Now the heat is due to the more condensed light as the bulb has a built in refelector to make it a spot light. I'm trying to use several panels of glass with a 40cfm pc fan blowing on them to cool off. Not as efficient as I would like though. Got any ideas? I was thinking a cold mirror or a UV filter, though I was told that enuff glass activly cooled would be the same thing as a UV filter. What do you guys think I should do? Go Fleux? Or go to lowes and get a 150 or 250watt halo spot light with a cold mirror or whatnot. Advice, comments- welcomed!🙂
Alright I know i dont have a proper light source yet but was trying to figure out distance of fresnel and objective lens etc. So I started with a 125watt halogen flood light that puts out 2000 lumens. Little dim but then it is a flood light. So I went to Wall-Mart in search of the bulb everyone is talking about (65watt Fleux lights of america) but didnt find one. So I got a bulb for my shop light I needed. Well then it hit me-its a spot light bulb and halogen BUT its only 90watts🙁 and 1100 lumens! Its a GE Halogen Plus with a 10o beam...Said what the heck see what I get. Hooked it all up and its like 4x brighter than the twice as pwerfull light I had before. Which proves we are waisting alot of light. This spot light projects almost the exact size of my projected image, its like a perfect match! Looking at it and my regular tv (not projector)_ running its about half as bright as tv with lights on! Not great but Dang good for a 1000lumen bulb! I would be happy with that brightness there! By the way I'm only projeting a 4' image not 8-12' like you guys are. Anyhow, both are halogen- but the spot lights beam is too hot even a 90watt one at my lcd panel in norm. config. so I had to lengthen the distance to panel untill I got about 45C. I would like to keep it closer. Now the heat is due to the more condensed light as the bulb has a built in refelector to make it a spot light. I'm trying to use several panels of glass with a 40cfm pc fan blowing on them to cool off. Not as efficient as I would like though. Got any ideas? I was thinking a cold mirror or a UV filter, though I was told that enuff glass activly cooled would be the same thing as a UV filter. What do you guys think I should do? Go Fleux? Or go to lowes and get a 150 or 250watt halo spot light with a cold mirror or whatnot. Advice, comments- welcomed!🙂
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