750w lamps in TDC 116

[Derek Gee <73157.2172@xxxxxxxxxxxxxx>]

Brad writes:
>When projecting I noticed that when the white side was placed toward the
>light the image was reversed, so I made the foolish mistake of reversing the
>slide. This means that the black side of the mount was now toward the
>lamps...and the heat. Each slide up for 10 seconds or less, but that was too
>long. I was also focused rather close, and consequently the opening between
>the carrier and the lamp housing was quite small. When I examined the slides
>later I found that some of the mounts had melted enough to be slightly
>distorted. Fortunately no images were damaged, but I did learn a lesson or
>two.
>1. Do_not_place the black side of RBT mounts toward the light/heat source.
>2. Do_not_focus too close or you might prevent proper circulation (and
>cooling) around the slides.
 
This has me curious.  I mounted my RBT's the same way and projected them in
a TDC 716 with 750w bulbs and noted no such damage.  Therefore, the problem
must lie with the cooling system of the TDC 116.  My TDC 116 is an early
model and carries an explict warning in the manual not to use 750w bulbs.
According to a photo-3d poster, later models apparently give you a choice.
When I installed halogen bulbs in mine, the heat cracked the ceramic 
adapters.  Does the wiring and/or cooling fan need to be modified to handle
that much heat?  Would modifications be needed for 500w halogens in the
TDC 116?  Any guesses out there???
 
                                      Derek Gee


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