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Thanks for the feedback guys, seems there is some interest in the cooling mod to my PGR camera, so I've attached a couple of images.
The basic kit is: a 95 watt peltier, thermal grease, and a PC CPU cooler.
Also attached is a graph showing the effectiveness of the system, the cooler was switched off just before 18 minutes of runtime, the steep ramp up in operating temperature is obvious at that point.
I tried a few heat sink types, from old Pentium 4 cpu coolers to more elaborate types with copper heatpipes (pictured). Most work well.
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