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Custom Bridge Rectifier on a preamp power supply

I need an advise from any memebers with experiences in custom bridge rectifier. I am thinking about building my own bridge rectifier. Can i mix two different diode ( 1 pair of Fred and 1 pair of Schottky)?? From my expereinces A Fred diode gives me more of a relax sounding( laid back, imaging are much laid back) and a Schottky diode ( dynamic, was more of in your face sounding) too much of forward sounding. To compomise, is it possible mixing two pair of diode together? Any advise are much appreciated!
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Showing 3 responses by atmasphere

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atmasphere
12,099 posts
 
The big issue is that rectifiers make noise due to a phenomena called 'swept resonance'. This is caused by how the rectifiers turn off in conjunction with the power transformer inductance.

To prevent this problem the rectifier has to be neutralized. There are several techniques. However once done properly the rectifier will no longer have a 'sound'.
atmasphere's avatar
atmasphere
12,099 posts
 
^^ I was trying to keep my response simple!

I saw a really simple solution that involved the use of a tube rectifier, which due to its linearity does not induce swept inductance issues. It was bypassed with a set of ordinary diodes. So when the diodes cut off, the tube rectifier took up the very brief load, preventing the resonance from getting started... only works if you have the winding for the filament though... and the room :)
atmasphere's avatar
atmasphere
12,099 posts
 
Actually I mentioned why that is in my first post on this thread.
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