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.
They have three M3 threaded inserts each that is used to clamp the MOSFETs to the aluminum backplate:
Here's a closeup:
And here's the back-side of the alu-plate, all holes countersunk...
Then comes the big old heatsink. I've attached a piece of aluminum sheet-metal that serves as a mounting bracket:
And here's the finished 'package':
Hopefully this will help other HP-UHU builders out there, thanks for looking.
/Henrik.