Well we got our heat sink back from the machine shop. It had a wicked warp in the middle and was more than likely the cause of three controller failures. I found the issue when I removed the last controller. With a 1/8 inch difference between sides. With that kind of gap its no wonder they failed. Even with built in cutbacks the owner would expect that to not be an issue. It is after all mounted to a hefty heat sink. Well it is not so easy is it. I will stand behind Kelly and the controllers and will put the blame with the company that supplied the kit for the person who purchased it. No wonder some of those Kelly Controllers died. I have always said to have a good sink that fits properly and with a fan to draw the heat away. You can have a look at the photos and see what the bottom of the Kelly looked like when I found it too was not flat but not by much. I cleaned it up and it is now mounted and ready to go.
I have notified Kelly that the bottom of the controller should be checked for flatness and not to paint them.
Be sure the surfaces are flat and unpainted and a good thin layer of thermal compound between. It is a must. With out fail. I must still mount a fan but for now and a bit of initial testing I can leave it off. It is now time to connect up the other components and then test again.
http://greenev.zapto.org/63ev/63_EV/Kelly_Control_Sink.html
I have notified Kelly that the bottom of the controller should be checked for flatness and not to paint them.
Be sure the surfaces are flat and unpainted and a good thin layer of thermal compound between. It is a must. With out fail. I must still mount a fan but for now and a bit of initial testing I can leave it off. It is now time to connect up the other components and then test again.
http://greenev.zapto.org/63ev/63_EV/Kelly_Control_Sink.html