Hi,
As those of you who have assembled and disassembled the HP-UHU a few times probably know, it can be a bit tricky to do since there aren't any access-holes in the board to reach the screws for the MOSFETs.
At first I thought it wasn't that bad but after taking it apart a few times during the initial debugging I got tired of it a decided a better way was needed. So I came up with the following:
Here's two "clamps" that fit across the MOSFET's on the bottom side of the HP-UHU board.
http://i158.photobucket.com/albums/t...SFETClamps.jpg
http://i158.photobucket.com/albums/t...-PCBBottom.jpg
They have three M3 threaded inserts each that is used to clamp the MOSFETs to the aluminum backplate:
http://i158.photobucket.com/albums/t...ntingplate.jpg
Here's a closeup:
http://i158.photobucket.com/albums/t.../4-Closeup.jpg
And here's the back-side of the alu-plate, all holes countersunk...
http://i158.photobucket.com/albums/t...5-Backside.jpg
Then comes the big old heatsink. I've attached a piece of aluminum sheet-metal that serves as a mounting bracket:
http://i158.photobucket.com/albums/t...6-Heatsink.jpg
And here's the finished 'package':
http://i158.photobucket.com/albums/t...isheddrive.jpg
Hopefully this will help other HP-UHU builders out there, thanks for looking.
/Henrik.