AW: PSU design?

[Haible Juergen]

	>. I used large
	>	trace for ground, unreg and reg voltage. 

	Make sure that the currents that charge the capacitor
	don't cause voltage drops inside your regulation loop.
	That is, connect GND from transformer/rectifier to
	capacitor, and from *there* to your regulator GND
	connection, and then from *there* to the GND output.

	If your output GND connection is between cap and
	rectifier/transformer, you'll get bad hum in the output.
	One typical error is to make very broad GND connections
	and connect everything just anywhere. The currents must
	be *forced* into a certain path, or they will find the path with
	least resistance, not least ripple.

	Don't know if that's the reason of your problem, but
	it was an error that I've made myself.

	JH.