Janey,
I am thinking that there maybe a problem with grounds especially the -out basically being part of the capacitor ground. You may want to try to create a different starpoint on the pcb.
Or, if you feel lucky, you may just want to split the connection to -out and put in pads for a couple of big size links to use for experimenting with grounds.
Oh yeah, one more thing. Are you sure that you have a heatsink big enough for all the output mosfets? they look awfully close.
I am thinking that there maybe a problem with grounds especially the -out basically being part of the capacitor ground. You may want to try to create a different starpoint on the pcb.
Or, if you feel lucky, you may just want to split the connection to -out and put in pads for a couple of big size links to use for experimenting with grounds.
Oh yeah, one more thing. Are you sure that you have a heatsink big enough for all the output mosfets? they look awfully close.
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