"Pete KE9OA" wrote in message
...
[..]
For about 2 dollars worth of components, any power
supply can be made to be quiet. Connect .01uF caps across each of the
rectifier diodes, and bypass each leg of the power transformer's secondary
to ground with 1uF non-polarized caps to ground, and you are all set.
[..]

I may well have this completely wrong, but wouldn't the 1uF caps from the
secondaries to ground introduce (common-mode) ripple on the positive and
negative outputs ?

Barry