My first projector... inside a dukane 670

sbisdabomb · 6th February 2005, 09:32 AM

Alrighty, after months of reading I'm deciding to construct my first projector. After I get my panel working on top of the dukane 670 (with a 575w Metal halide bulb) I want to construct a box, get new fresnels, and most likely add a better reflector and a condenser lens.

I think I broke my panel which I got for free from my folks, who had a 15” Kogi (gVision) LCD with a burnt out backlight. I was messing around while extending the FFC cable while the power was on, and no more response from the LCD. I ordered another broken one off of eBay; hopefully I can get it working with the parts from that. If anyone has any suggestions on what I can do to fix it I’m all ears.

My main reason for the post was that my OHP seems very inefficient; I know my bulb is rated at 49,000 lumens and the projector is about 6,000 (it currently seems extremely bright). When I put it all into a box do you think I should use a spherical reflector (note the crappy half dollar sized reflector currently in there) as well as a condenser lens? What should I be looking for in a condenser lens? How much more light do you think I’d get to the panel? Thanks in advance

sbisdabomb · 11th February 2005, 12:01 AM

I've come to the conclusion that a spherical reflector would be the best in my set up. But the bulb already has a short lifespan at 1000 hours and I don't want to diminish that. I've looked all over and can't find a Spherical reflector with a dichroic coating on it. Does anyone have any sources, preferably in the U.S?

18wheeler · 11th February 2005, 01:14 AM

doesn't dukane 670 have a spherical reflector of its own?

sbisdabomb · 11th February 2005, 04:20 AM

Yes, it does, but the current reflector is fairly small. It looks to be the perfect size if I'm not using a condenser (if it were any larger the rays would miss the Fresnel) But I think I’m going to use a condenser when I put it in it’s box in attempts to get more light to the LCD.

Beall · 15th February 2005, 09:21 PM

I got a dukane 677 OHP in mind, just wondering how much it cost to replace a MH bulb? Cos i am not from the States makes it harder to get it here Down Under.

sbisdabomb · 16th February 2005, 03:01 PM

If it's the same 575w HMI bulb you can get the GE osram ones on ebay for about 80 dollars. However there was a group buy for some of them in china, I think they got the bulbs for less than $20 each after shipping. They don't last the full 1000 hours but you might want to try and contact 18Wheeler, I bought a couple off of him just a month ago, total came out to about 22 dollars a bulb including shipping. I'm sure shipping would be more to AU though.

Good luck

mdorani · 18th February 2005, 09:42 AM

i got a dukane 677 and i was also intrested in where to get cheap replacement bulbs

here r pictures of the inside

http://home.no/perrat/DSC00015.JPG
http://home.no/perrat/DSC00016.JPG
http://home.no/perrat/DSC00017.JPG
http://home.no/perrat/DSC00018.JPG

mdorani · 18th February 2005, 09:42 AM

also how do i contact "18Wheeler"

Beall · 18th February 2005, 12:17 PM

here is 18Wheeler's contact details.

http://www.diyaudio.com/forums/membe...fo&userid=5056

11th February 2005, 12:01 AM	#2
sbisdabomb diyAudio Member Join Date: Dec 2004 Location: fort collins, co	Sphearical Dichroic reflector I've come to the conclusion that a spherical reflector would be the best in my set up. But the bulb already has a short lifespan at 1000 hours and I don't want to diminish that. I've looked all over and can't find a Spherical reflector with a dichroic coating on it. Does anyone have any sources, preferably in the U.S?

16th February 2005, 03:01 PM	#6
sbisdabomb diyAudio Member Join Date: Dec 2004 Location: fort collins, co	purchasing 575w MH hmi If it's the same 575w HMI bulb you can get the GE osram ones on ebay for about 80 dollars. However there was a group buy for some of them in china, I think they got the bulbs for less than $20 each after shipping. They don't last the full 1000 hours but you might want to try and contact 18Wheeler, I bought a couple off of him just a month ago, total came out to about 22 dollars a bulb including shipping. I'm sure shipping would be more to AU though. Good luck

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11th February 2005, 01:14 AM	#3
18wheeler diyAudio Member Join Date: Jan 2003 Location: Northwest, US	doesn't dukane 670 have a spherical reflector of its own?

11th February 2005, 04:20 AM	#4
sbisdabomb diyAudio Member Join Date: Dec 2004 Location: fort collins, co	Yes, it does, but the current reflector is fairly small. It looks to be the perfect size if I'm not using a condenser (if it were any larger the rays would miss the Fresnel) But I think I’m going to use a condenser when I put it in it’s box in attempts to get more light to the LCD.

15th February 2005, 09:21 PM	#5
Beall diyAudio Member Join Date: Feb 2005 Location: Canberra	I got a dukane 677 OHP in mind, just wondering how much it cost to replace a MH bulb? Cos i am not from the States makes it harder to get it here Down Under.

18th February 2005, 09:42 AM	#7
mdorani diyAudio Member Join Date: Nov 2004 Location: underworld	i got a dukane 677 and i was also intrested in where to get cheap replacement bulbs here r pictures of the inside http://home.no/perrat/DSC00015.JPG http://home.no/perrat/DSC00016.JPG http://home.no/perrat/DSC00017.JPG http://home.no/perrat/DSC00018.JPG

18th February 2005, 12:17 PM	#9
Beall diyAudio Member Join Date: Feb 2005 Location: Canberra	here is 18Wheeler's contact details. http://www.diyaudio.com/forums/membe...fo&userid=5056

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