P3D Re: PHOTO-3D digest 3023

[Ronald Beck <ronald-beck@xxxxxx>]

> RE: George has almost said it..the principle reason for the fan 
> cooling is for the lamphouse and bulb, which will soften and bulge if 
> the cooling air though the lamphouse is lost or insufficient. The air is 
> also diverted to other parts but lamp house is paramount.  BobH
> For anyone looking for the heat "filter" it is often segmented, 
> greenish glass and sometimes is molded as a condenser. 
> BOB HOWARD (bobh@xxxxxxxxxxxxx)

One other note regarding these bulbs, make sure there are no
fingerprints on the bulb when you put it in place.  Any oils from
fingerprints tend to assist in heating the bulb to the point where it
will bulge out.  We had a lot of bulbs in our high school theater lights
do this until I learned this little "trick".

HTH,
Ron


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