I got my new lamp. It is for commercial projection use. people use it to replace the

[elektron]

Hi folks
Finally read every post in this topic ...
But it paid off!

I am looking for several replacementlamps and the funny thing is that some of those which I need allready came above some pages back by other members. Sadly there were no closing answers on which lamp should be used.

Benq PB6100:
everywhere I look on the internet it sais that it's 200W UHP, but some say it's NSH?

Hitachi S830:
It's 150w and 60v, I don't know if it's ac or dc. The original lamp still works so I cant take it out to have a look.

Infocus lp735:
Also 150w, I hink it's ac but not sure (also working lamp, so I cant check yet)

Hitachi L850W:
Is 260w, dont know ac or dc but can check this tommorow.

Polaroid Polaview 201:
250w, think ac but I'm not sure (also cant check).

I'm a little confused with the voltage matter too. I thought lamps like hqi, uhp,... all worked on +- 90V. I have a 150w uhp lampmodule (hitachi 940) and at the bottom of the module is written: 150w / 100V.
Can anyone help me with this matter?
I'm also making a diy beamer and would like to order the 250w YWd AC, but I dont know if I can use this with an 250w HQI ballast?

[ywh]

Hi part2wanksta !
I can not see your pics.

Hi elektron!
if you have pics of your bulbs, that is easy to know ac or dc.

[elektron]

I'll try to take pictures of the lamp of the benq and hitachi 850 (these are the only lamps who are allready broke).

Could you maybe help me out with the whole voltage matter?
This is the case:

I'm making a diybeamer with a 15,4" widescreen tft. I was planning of using a big 400w HQI (diameter 6cm, arc = about 25mm). But now that I see this topic I think it's way better to use a lamp with a short arc.

Do you have a 400w bulb with a short arc that will work on a 400w electronic ballast?

Or do you think if I use a 250w bulb with a short arc it will give almost the same result as with the 400w hqi I was planing of using first? And would this 250w work on a normal 250w hqi ballast?

thx!

[elektron]

Pictures:

Benq (still in the reflector):


Broken lamp of the hitachi 850, from what I see I think it is DC. I see one longer, thicker electrode that has cracked and is loose in the bulb:

[ywh]

the whole voltage matter your said is operational voltage, there is othere matter, the start-up voltage.
so my bulb can not work on a 400w electronic ballast of HQI.
I have other type bulb, it can work on a 400w electromagnetic ballast of HQI, but not the 400w electronic ballast of HQI. look the pic.

the bulb still in the reflector is a DC super high-pressure mercury lamp
,it is NSH, but my 200w jyd work on ballast of NSH is not well. there are some risk.

Broken lamp is metal halide lamp, and you can test the operational voltage , DC or AC.
http://www.aboutprojectors.com/Hitac...projector.html
http://www.projectorcentral.com/Hitachi-CP-L850W.htm

And this is cheaper:http://cgi.ebay.com/HITACHI-DT00161-...QQcmdZViewItem

[elektron]

Do you have a 250w version of the lamp on your picture (this: http://www.diyaudio.com/forums/attac...amp=1168136494)?

And this lamp will work on a 250w hqi ballast? (normal one, not electronic)

[ywh]

250W

[part2wanksta]

hey ywh you forgot to ship the cement with this bulb here is the picture of what i got

[elektron]

Thx for the help. Is it possible to order the bulb only, without the ballast. I have a non-electronic 250w HQI ballast so that should work.

PS: What type of reflectors can you sell?

[ywh]

Hi ! part2wanksta

keep the original cement when you scrape it off, mix it with some water, you can used it again maybe

Hi ! elektron!

about the reflectors , I have paraboloid / ellipsoidal / spherical, the spherical is for DIY projector, paraboloid and ellipsoidal is for commercial projector

spherical