[AndrewFischer]

Would anyone care to review my KGSS PCB layout? Circuit is Gilmore's except I've dropped in a MAT-02 at the input. One channel per board.

Mat02 datasheet (PDF)

I'm using ExpressPCB.

Schmatic

PCB Layout



I've been sitting on this design for nearly a year. I finally have the money to build it.

 

[meat01]

Your schematic link doesn't work. I think you have two http's in there.

 

[AndrewFischer]

Quote:

Originally Posted by meat01 Your schematic link doesn't work. I think you have two http's in there.

Ooops. Fixed it.

 

[teucer]

Don't forget the two caps in the third stage. They go between 2sc2705 base and 2sc3675 collector. Here's my schematic with the caps in place:
http://www.utdallas.edu/~grantr/file...%20channel.EMF

I would check with Gilmore (if you haven't already) to see if any other components need to change to use the MAT02.

In your pcb make sure you leave room for stand-up heatsinks on the third stage 2sc3675's. I would also avoid right angle traces. Don't forget to include mounting holes and wire holes for the various inputs.

I don't think too highly of expresspcb. Their software is very basic and they force you to use their pricy service. In the future you may want to try Eagle (unusual interface but widely used) or Proteus Lite (used by at least one successful amp builder). I use Protel DXP which has a free downloadable trial, but it stops working after 30 days. Most regard it as too complex for the occasional hobbyist.

For reference, here are the files for my kgss layout from a couple years ago:
http://www.utdallas.edu/~grantr/files/kgss/
and various pictures of the build:
http://www.utdallas.edu/~grantr/images/kgss/

 

[AndrewFischer]

Quote:

Originally Posted by teucer Don't forget the two caps in the third stage. They go between 2sc2705 base and 2sc3675 collector. Here's my schematic with the caps in place: http://www.utdallas.edu/~grantr/file...%20channel.EMF For reference, here are the files for my kgss layout from a couple years ago: http://www.utdallas.edu/~grantr/files/kgss/ and various pictures of the build: http://www.utdallas.edu/~grantr/images/kgss/

THANKS!!!