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Old 27th June 2002, 05:29 PM   #1
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Default Rectifier caps?

What is the best capacitor to put on rectifier bridge to supress RF signals? Should I use 100n ceramic or MKP?

Supernet
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Old 27th June 2002, 05:48 PM   #2
tiroth is offline tiroth  United States
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I couldn't find the post, but there was some discussion recently and a link to a whitepaper that had some theory behind this.

http://131.109.59.51/images/pdf/Calc...m_Snubbers.pdf

Probably more important than dielectric.
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Old 27th June 2002, 05:48 PM   #3
tvi is offline tvi  Australia
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One of the first mods I did in my system some many years ago was to change the typical Japanese Mylar caps that Onkyo used across the diodes in the bridge rectifier.

I changed them to Wima MKC10s Polycarbonates (from memory) as I had them, they fitted the PCB space and were the right Voltage. It made a very noticalble improvement in the high end and I think the image was improved.

I think the original Mylars (sometimes called Green caps, in Australia at least) were of a fairly inductive type as compared to the stacked foil Wimas so that may have been a factor?

Eventually I improved that Amplifier to death

I'd try the Cetramics as long as they are good multilayer types.


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James
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