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Picked up a foot of 2" x .250" copper from Online metals. Picked up, because even across town shipping would have been greater than the price of the metal!
So there is the heat spreader.
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hummm.
A possibly futile effort to partially circumvent the three laws of thermogawdamics.
Do the name "Jean Charles Athanase Peltier strike a familiar note"?
I don't think this will be much of an advantage but the "trick factor" is there.
The internal screw bosses are 3.67mm the Peltier are 3.87mm thick.
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Look, I know I promised no more crap pics but I'm out of AA's for the moment.
Just take my word for it that the spacing on the the back of the HR-2510 is 25 x 25mm.
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back to work ...