MH bulb with Enclosed Luminaires - What do you think?

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#82
Rolm said:

In any event, I've trashed my OHP at this point (I broke the thermal glass that is bonded to the fresnel), so I'm in the market for another OHP. I will try to buy one that uses an EHJ bulb. If, as I hope, that means that it comes with this apparatus, I will try to do the same mod you have done.
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rolm, i have an elmo HP-A305LV (low intensity version of the solar deluxe, has triplet optics) - 24v/250w EHJ assembly with separate reflector, lamp, and lens.


HTH
 
#85
NP.

Actually, I've been doing some research into which OHPs have this setup (I'm unsure if this is indeed what "triplet optics" mean). It appears that most that use EHJ, EVD, EYB, and FCS bulbs use the same basic layout, but some of them appear to be missing the condenser lens, which doesn't make sense to me.
The real problem with figuring out which OHPs are candidates for this is that you need to see a parts diagram to know if all the components are there.

I also need to do some more research as to what the least expensive approach to bulbs and ballasts. Optimally (for me) would be a 400w HQI or HMI that can use an M59 ballast (that I already have), but I'm not finding it.
 
#87
remp said:
Rolm

Far as I know triplet refers to how many lens are in the projection head assy. One , two or three.

Two and three are better than one....so they say

My 3m 1705 has a single projection lens and its spot on.
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the triplet head assembly is convenient - mine has a rotating lens that focuses, no need to move the entire assembly up and down on the arm.

rolm, check http://www.mbelectronics.com/3M/index.html some of these PDFs have diagrams of 3M OHP internals.
 
#88
Reflector & Light

This a post directed to Rajkumar from another thread "Not Enough Light". I am using an elliptical aluminum reflector from a high bay light like you would see in a Home Depot (a little big though). I have switched from the 400W Philips Metal Halide because they have a "dimple" in the top of the bulb which interfears with the light (this also might be because my condensor lens is not right on the F2). I am now using a 400W Sylvania Metal Halide with better results. If I have time today I am going to be confirming my F1 and F2 positions to be sure I am getting the maximum light potenial from this light.
 
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