Quote:
Originally posted by mhelin
Evil,
Add small caps 22-100nF across the odd numbered diodes (D1,3,5,7) in PSU. Also cut the groud line either to the PSU or to the power amp if it isn't cut already, there may be ground loop (same thing as different ground levels). Use bigger heatsinks. Outside of case, on the back panel.
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Caps across the diodes are to reduce noise? Since I used Shottky diodes, the noise should be low already I think. Certainly I couldn't see anything other than normal ripple with my 'scope.
I've had my fair share of ground loops before, so I laready cut that 
As for heatsinks: I would have used external heatsinks, but I didn't want to put them on the sides, for aesthetic reasons (it's bad enough having the connectors sticking out!), and can't put them on the back because I then wouldn't be able to remove the back without having to disconnect wires. Also it would force me to electrically insulate the chips, which would negate part of the advantage. I suppose what I could do is mount a large heatsink on the back to cool the air inside, leaving the current heatsinks alone.
Anyway, I have already performed temperature measurements on them, and they remain within sensible limits.
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15th October 2004, 07:04 PM
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