Hi ! i have this british amp with output devices mounted of the metal case that works as heathsink ... very british way
in a word it looks quite messy
In a car audio amp i have seen this much more elegant solution with a thermal conductive sheet and a bar to keep the devices attached on the surface
This solution among other things will allow for a easier removal of the entire board
I have spotted some bad solderings but i would like to work out of the case
Any suggestion ? Thanks a lot
gino
in a word it looks quite messy
In a car audio amp i have seen this much more elegant solution with a thermal conductive sheet and a bar to keep the devices attached on the surface
This solution among other things will allow for a easier removal of the entire board
I have spotted some bad solderings but i would like to work out of the case
Any suggestion ? Thanks a lot
gino
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I'm not sure the clamping bar is a "better" solution, just faster/easier (and therefore cheaper) for the manufacturer to assemble.
If the individual holes are already made in the case I would just remove the board and then clean the case and reassemble with new thermal paste when you are done working on it.
If the individual holes are already made in the case I would just remove the board and then clean the case and reassemble with new thermal paste when you are done working on it.
Hi thanks for the very helpful advice A clamping bar could have just one screw ... it looks dirty
Do the electrical insulation sheets work well ? i also dont like the metallic screw
I have seen nylon ones but i am afraid they will crack with time
Moreover these mosfets are also mounted not aligned Unbelievable A good DIYer would do a so much better job that is unbelievable
I do not want to sound too critical but the design phase is a very important one The choice of layout ... thermal dissipation ... etc.
Do the electrical insulation sheets work well ? i also dont like the metallic screw
I have seen nylon ones but i am afraid they will crack with time
Moreover these mosfets are also mounted not aligned Unbelievable A good DIYer would do a so much better job that is unbelievable
I do not want to sound too critical but the design phase is a very important one The choice of layout ... thermal dissipation ... etc.
Agree, but don't think that neatness = best solution in all cases:
- The unaligned FETs look messy but it has no impact on sound or thermal performance.
- The metallic screws are perfectly safe if used correctly and nylon/POM screws can be damaged if tightend too much during mounting which leads to worse performance. The only exception for me would be HV applications, but this isn't one.
- The mica + grease mounting is pretty much the best you can get (if done right) from a thermal POV, but because it takes much longer to do than thermal pads it was deemed to inefficient for mass production.