LimeSDR Heatsink model

This is a model to be used for finding final dimensions for a heatsink to be used with the LimeSDR in an Aluminum case available on Ebay.

The heatsink design is done with freecad, and exported as the model for printing. It is undersized in the vertical dimension.

Print the model, then use your board, spacers, and case to determine with a feeler gauge how much larger the actual heatsink should be. There should be enough of a gap left to install silicone transfer pads on top of the three large ICs. I used 2mm thick pads. I also put small pads between the voltage regulators on the bottom of the board, and the bottom of the case.

I used m3 nuts under the board as spacers, and tapped three holes on the heatsink to fasten it to the case with three m3 flathead screws. I also used flathead screws in countersunk holes for the board.

The heatsink is machined out of a solid block of aluminum, and transfers heat to the case.

[Here are the end panels I used](http://www.ebay.com/itm/1