I took a 60x60mm finned heatsink and drilled holes in it to allow M3 bolts to pass through it, with a low-profile fin heatsink on the back and the SDR as the meat in the sandwich in between. The heatsink is now barely warm to the touch. Downside is it's several times the original size and weight, but since I'm running it off a USB hub it's not noticeable.


Well, at least it has a look that says it means business...