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BrianG · 05.23.2007, 08:23 PM

AAngel: Um, I'm not Serum. ;)

Cajun: Like AAngel said, you could use regular thermal compound, but you'd have to make sure it doesn't move around at all. Even though it may seem solid if you try to move it with your fingers, keep in mind the shocks your truck suffers from jump landings, crashes, etc. Any movement makes that stuff not work right after a while. Plus, any dirt will stick to any stuff that squishes out and makes a mess. Thermal epoxy is your best bet to keep the heatsink attached.

If you decide to go with a bigger heatsink, let me offer you some points to ponder: 1) make sure you can still access the screws to remove the circuit from the case. If the heatsink covers these, maybe drilling a hole where the screws go will work. 2) Attaching a larger heatsink increases the risk of something hitting it since some of it may be hanging over the case, which might rip those FETs right off the board. 3) Attaching a larger sink also increase the weight that the FETs have to support, which could cause the situation in point #2.

	(#7)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	05.23.2007, 08:23 PM AAngel: Um, I'm not Serum. ;) Cajun: Like AAngel said, you could use regular thermal compound, but you'd have to make sure it doesn't move around at all. Even though it may seem solid if you try to move it with your fingers, keep in mind the shocks your truck suffers from jump landings, crashes, etc. Any movement makes that stuff not work right after a while. Plus, any dirt will stick to any stuff that squishes out and makes a mess. Thermal epoxy is your best bet to keep the heatsink attached. If you decide to go with a bigger heatsink, let me offer you some points to ponder: 1) make sure you can still access the screws to remove the circuit from the case. If the heatsink covers these, maybe drilling a hole where the screws go will work. 2) Attaching a larger heatsink increases the risk of something hitting it since some of it may be hanging over the case, which might rip those FETs right off the board. 3) Attaching a larger sink also increase the weight that the FETs have to support, which could cause the situation in point #2.