Hello,
I was just searching around a bit trying to find opinions on whether the more expensive heat sink compound is really any better than the cheap stuff. In a tiny store like Radio Shack they have three different types to choose from, so that must say something, but what?
However...I can't help asking myself why in the world they design this stuff so you can bolt up the heat sink in a nice solid metal to metal fashion. If the name of the game is heat removal, then nothing beats a metal to metal junction. And it seems furthermore that the compound you're supposed to do use also has heat insulating properties as well as electrical. I thought the grease was supposed to a way of 'countering' the fact that there wasn't a good a decent connection between the transistor and the heat sink in the first place. If the plate on my four TDA7294 transistors are all at the same potential, can I just mount the heat sink directly and insure that the heat sink itself doesn't touch any other part of the enclosure? I think heat transfer would go up by nearly 80% this way!!
Thank you for your opinions,
Rick
I was just searching around a bit trying to find opinions on whether the more expensive heat sink compound is really any better than the cheap stuff. In a tiny store like Radio Shack they have three different types to choose from, so that must say something, but what?
However...I can't help asking myself why in the world they design this stuff so you can bolt up the heat sink in a nice solid metal to metal fashion. If the name of the game is heat removal, then nothing beats a metal to metal junction. And it seems furthermore that the compound you're supposed to do use also has heat insulating properties as well as electrical. I thought the grease was supposed to a way of 'countering' the fact that there wasn't a good a decent connection between the transistor and the heat sink in the first place. If the plate on my four TDA7294 transistors are all at the same potential, can I just mount the heat sink directly and insure that the heat sink itself doesn't touch any other part of the enclosure? I think heat transfer would go up by nearly 80% this way!!
Thank you for your opinions,
Rick