Heat in the TDC116

[P3D Jamie Drouin <jdrouin@xxxxxxxxxxxxx>]

        I was either the first or second person to consult with George on
the heat build-up in a newly aquired TDC116.  I found out rather quickly
that after 30 seconds of exposure, my RBT mounts were being melted.  There
was extreme distortion of the window and the pebbled surface had turned
gloss.

        I have no comparison to check if the fan is running at its intended
speed, but there is a fair current and I would think this is enough to
keep the heat down.  The bulbs are the proper 500W, and I have also
attempted to check the heat absorbing glass, but am not sure what exactly
I'm looking for.  Besides six condenser lenses (three on each side), there
are two pieces of flat glass.  Assuming these are the heat absorbers, they
are positioned after two condensers from the bulbs, not immediately after
the bulbs as had been described by someone earlier.  The polarizers are
immediately behind the slide carrier, which is, I believe, where they're
supposed to be.

        I have just run a quick test, turning on the projector for 30
seconds.  First, with an RBT mount with white towards the light, and after
the said time the white was very warm.  Second, with an RBT mount with
black towards the light, and it became very hot and had began to melt, with
the window distorting and the surface turning gloss.

        Although there is an obvious difference between the temperature
created by the two sides, the white side was still alot warmer than I had
expected, and I believe this is not safe for the emulsion when I actually
put a slide in.

        Any help is GREATLY appreciated.


                                                           :-)jamie.

Jamie Drouin (jdrouin@xxxxxxxxxxxxx)
______________..___________________
    Photographer & collector of
     Stereophotographic items
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 http://www.islandnet.com/~jdrouin



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