I got my new lamp. It is for commercial projection use. people use it to replace the - Page 13 - diyAudio
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Old 10th July 2005, 03:41 AM   #121
ywh is offline ywh
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Hi minoten
yes, they have single and double ended versions of the 250w and 400w, they had sent the confirmed information for me yesterday, it is a word file, but i can not open it, why?
i don know.i asked once more.wait, pleace.
the bulb will run off an electronic ballast of 400w HMI,like my projector:
Click the image to open in full size.
Click the image to open in full size.

the bulb can run off most electronic ballast
i don't know the features of the included e-ballast now,
you need the glue that bond the lamp and the reflector.
Sorry I can not get a 400W electronic ballast.

Hi Me2!wait, pleace

Hi agent.i will try to do it

Hi prime the model is "PMA161X USHIO INC"."MADE IN JAPAN"
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Old 10th July 2005, 04:52 AM   #122
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Default Re: Catalogue

Quote:
Originally posted by Me2!
YWH,

It sounds like you have access to many items I would be interested in.

If the quality is good, I'd refer friends to your catalogue too. Can you provide a list?
Here you are:

18wheeler's DIY Parts Store :-)

As you will find, many important informations are not included. That means either we (ywh and I) don't know or we couldn't confirm those information.

Items with price tags and 'add to cart' button are ready to be ordered. All the price include the shipping cost and the necessary paypal fee. Ballasts are ready for non-US (non 110V) order. Once I receive my ballast and test it work in 110V, I will make it available for ordering.
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Old 10th July 2005, 07:14 AM   #123
sabrex is offline sabrex  United States
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Hello 18wheeler,

Any idea on when the 400w bulb would be available for purchase to the US? Also I would just like to buy the 400w bulb and holders without a ballast, would this be possible?

Lastly, I would like to thank both you and ywh for spending your own time and effort in making these great and obscure parts available for the rest of us. If they are as good as they seem to be, it'll be a boon to the diy community.
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Old 10th July 2005, 07:47 AM   #124
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http://www.lamptech.co.uk/Spec%20She...%20UHP120.htm:

INteresting Side note read this page............. Notice the Following
"By operating the arc at high pressure, typically in excess of 200 atmospheres"


then I mosey on over to
http://www.tvtechnology.com/features...07.07.04.shtml

And see
"Fluorescent lamps typically operate at rather low pressures of a few atmospheres; UHP lamps operate at pressures above 200 atmospheres. The scuba divers reading this know well that an atmosphere, corresponding to standard atmospheric pressure at sea level, is about 14.7 pounds per square inch. 200 atmospheres is then about 3,000 pounds per square inch."

Dare I ask what happens if we happen to drop one of these suckers
??????
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Old 10th July 2005, 08:44 AM   #125
sabrex is offline sabrex  United States
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I believe they mean 200 atms when it's hot an in operation. If its not then, pressure would just increasure further during operation and be significantly higher than 200 atms.
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Old 10th July 2005, 08:50 AM   #126
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VF the first one is a Mercury a closer example would be
http://www.lamptech.co.uk/Spec%20She...C%20MEI575.htm
which is a 575 Watt metal halide in the slim tube with center bulge double ended.
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Old 10th July 2005, 02:18 PM   #127
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It is GE's HMI 575W lamp. It is mostly used in stage lights, but a few overhead projectors also use it. Such as Elmo SolarDelux, Dukane 670, 680, 3M 9800, etc.

If you have one of those OHPs, you can use it without modification. the price for a single bulb is normaly above $100. But recently I have seen a eBay store selling them for ~$80.

YWH had supplied this bulb(400hr life version ) to our community. Two group buys were set up by him an myself. I am considering stock this bulb in my little "parts store", since quite a few people asked me for this lamp after ending of the group buy. However, the price of the bulb has been increased to $36 a piece, which make it less attractive.
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Old 10th July 2005, 02:23 PM   #128
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I think ywh has said the 400W lamp is available, but not its matched ballasts. but I will confirm it with him. If so, I will make it available. I will also add holders.

It is not the first time ywh made a boon in our DIY community. Don't forget he was the first person introduced using LCD monitor as video source to us. That was the first ture high quality big picture in our forum.



Quote:
Originally posted by sabrex
Hello 18wheeler,

Any idea on when the 400w bulb would be available for purchase to the US? Also I would just like to buy the 400w bulb and holders without a ballast, would this be possible?

Lastly, I would like to thank both you and ywh for spending your own time and effort in making these great and obscure parts available for the rest of us. If they are as good as they seem to be, it'll be a boon to the diy community.
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Old 10th July 2005, 09:53 PM   #129
rth is offline rth  United States
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Wow, this is interesting stuff!

Based on that chart posted above, it is clear that for bulb life and lumen output we really want to power these bulbs with DC rather than AC. I can build DC power supplies or any kind of power electronics so I'm wondering what these ballasts really do. Does anybody know or has anybody tested the output of a ballast to see if they have a constant output voltage or if there's an initial voltage peak or a repeating waveform of some sort? I don't know much about these bulbs (or even the metal halide bulb I use in my pj) so I have no idea what kind of voltage they require to strike and maintain an arc.... any help would be great because I'd love to build my own ballast
__________________
construction is done!
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Old 10th July 2005, 10:24 PM   #130
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According to Ushio's website the PMA161 is for 155-160 Watt bulbs and the ballast for the 250W is the PMA251. I thought the example photos are for the 250W are they really for the 150W???
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