On Sun, 20 Nov 2005 01:08:01 -0800, you wrote:

>These would be the so called 'snubbing' capacitors, I think. They are
>supposed to reduce ringing of the LC circuit when the diode switches.
>(L = transformer winding, C = filter capacitor). I've seen lots of
>folks arguing about whether they make any difference. I have never
>found any difference, so I don't use them. Some folks say that an RC
>network, or just a resistor, works better than a capacitor.

I was recently talking to a guy a an EMC test house. He says that caps across a bridge make a big
difference to conducted emissions, and it's the first thing they try when they have a product fail,
and it frequently is the only thing they need to do to make it pass.
 

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