PSU Caps

Discussion in 'DIY Discussion' started by leo, Sep 16, 2006.

  1. leo

    leo

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    Have any of you guys used the BHC/DNM T-network caps? http://www.dnm.co.uk/capbhc.html
    Was wondering if any good used in amps psu's

    Also any sugestions on decent rectifier diodes for amps? I currently use the MBR20200/MBR10100 and was wondering if theres anything else as good or better than these:)
     
    leo, Sep 16, 2006
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  2. leo

    zanash

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    11DQ10...30DQ10 etc ....are my prefered schottky's

    but its a suck it and see.
     
    zanash, Sep 16, 2006
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  3. leo

    leo

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    Cheers Pete,

    They would be fine for cdp's or dacs but their current is too low for an amps psu, the MBR's are 10 and 20A's schottkies but was wondering what else is a good high current diode

    Because I have quite a few different amp modules I wanted to make a nice separate powersupply rather than having to buy transformers etc for each amp, just trying to find the decent parts like diodes and caps to use:)
     
    leo, Sep 16, 2006
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  4. leo

    zanash

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    yes sorry half asleep !

    The Avondale web page has some interesting rectifier diodes
     
    zanash, Sep 16, 2006
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  5. leo

    leo

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    No probs, I'm half asleep most of the time anyway:D

    The ones on the Avondale site are MBR20200's, I use these in my NCC200.

    Also thinking about using snubbers on the secondarys of the transformers in the separate psu.
     
    leo, Sep 16, 2006
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  6. leo

    wadia-miester Mighty Rearranger

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    Leo,

    They are diodes which negate the use of snubbers and have no zero forward and reverse recovery. switching time of 25n/s and current upto 30 amps and 1200v.
    so they are fat better ones out there sir.
     
    wadia-miester, Sep 16, 2006
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  7. leo

    zanash

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    I agree snubber are not the way forward .....as WM says there are bigger and better out there. Though I've not used any as I've tended to concentrate on small current devices like cdp and dacs.
     
    zanash, Sep 17, 2006
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  8. leo

    leo

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    I don't mean snubbers across the diodes to help with switching spikes etc but a resistor/cap across the transformers secondary, its just to help leakage inductance in the transformers and the stray capacitance in the secondary.
    Some also use a 5w 0.1R resistors to feed the rectifiers

    Come on guys its not that often I ask for advice:) if theres better diodes for amplifiers at least give us a clue whats better than the MBR20200's:D I've tried a few others like MSR860,MSR1560 and a few other Hexfreds.
    I don't need huge current just things that are suitable for classD/T and average powered A/B amps
     
    Last edited by a moderator: Sep 17, 2006
    leo, Sep 17, 2006
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  9. leo

    zanash

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    As I say I tend to use smaller value ones ........

    Infineon Technologies these people have some new ones out ...may be these will be what your looking for ?
     
    zanash, Sep 17, 2006
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  10. leo

    leo

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    Thanks I'll check them out:) I just want to make the separate PSU the best I can so was wanting to hear of any experience with different components people have tried

    So anybody have experience with the T-network caps? they are fairly expensive but are they worth the price
     
    leo, Sep 17, 2006
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