Quark 125B / Sky Technologies

[BrianG]

I always recommend Arctic Silver epoxy. They have two types; Arctic Silver Thermal Epoxy and Arctic Alumina.

The thermal epoxy has silver particles in it. While not truly electrically conductive, it can exhibit capacitance. So, you don't want to get this stuff on any electronics, like the legs of the FETs. It works fine for the main case though. I say all this, but I did use this on my FETs - you just have to be VERY careful that you use a very thin layer just enough to adhere but not squish out and get on anything else.

The Arctic Alumina is totally non conductive/capacitive. So, this is the stuff to use on the FETs if you decide to go that route.

BTW: The freezer trick works on the first one, but I'm not sure about the Alumina stuff.

I do know that thermal epoxy does not transfer heat quite as well as a good thermal goop, but if the surfaces using the goop are allowed to move around, this would make the goop worse than the epoxy.