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#1 |
diyAudio Member
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Hi All and happy new year!!!
I want a make a 300b power amp, with hybrid rectification, tube/diode, but on hand only have HER508 diodes, they can work?? The tube rectifier is a 5Z3. Diode Datasheet Example of rectification.. ![]() Thanks for help.. Alberto.
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#2 |
diyAudio Member
Join Date: Dec 2012
Location: Flanders
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You didn't indicate the sec.voltage of the transformer ??
The max reverse voltage of the diodes hase to exeed (largely) the Vp of the transfo. Ater the rec.tube the capacitor is limited to 32µF not 100 ! Mona |
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#3 |
diyAudio Member
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Hi, thank you for reply.
Is a choke load PSU, transformer secundary 510V. Trafo-hybrid rectification-10H choque-45uf film-5H-45uf film, one 5H per channel. Regards. Alberto.
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#4 |
diyAudio Member
Join Date: Sep 2009
Location: Catalonia - Europe
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It seems HER508 diodes are OK.
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#5 | |
diyAudio Member
Join Date: Sep 2009
Location: Milano
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Quote:
i am curious to understand if these diodes could work fine in a power supply for a dac. Do you have any advice or direct experience ? have you used them in your project ? what the outcome ? I have decided to use them instead of more high-end options ... maybe wrongly. I am worried about their possible switching noise mainly. I have bought 100 on ebay.com to try them out. Thanks a lot. Kind regards, gino
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Thank you very much indeed Kind regards, gino ![]() |
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#6 |
diyAudio Member
Join Date: Apr 2008
Location: Carlisle, England
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I have used same series of diodes in a couple of valve amps and there is no switching noise.
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#7 | |
diyAudio Member
Join Date: Sep 2009
Location: Milano
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Quote:
I am playing with some low voltage regulator kits built around the lt1083cp. being cheap some parts quality is suspicious ![]() So I am replacing mostly caps and diodes. For caps I use mainly Nichicon and Panasonic. For diodes I need some axial ones. (for now I am going to leave any other thing unchanged). Then I found this thread and I am happy to have got an important confirmation. I read al lot about diodes switching noise. From what I understand it results in spikes at high Hz, a kind of noise very difficult to suppress with normal regulators (they have very bad PSRR at Hz > 10kHz usually = ineffective). I still wonder if it would be better a slow switching type ? But I have bought some of these and I will try them out soon. Thanks a lot again. Gino
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Thank you very much indeed Kind regards, gino ![]() Last edited by ginetto61; 18th July 2016 at 06:34 AM. |
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