Rectifier Diodes

richie00boy · 19th April 2004, 09:14 AM

I don't believe that the sound of different diodes used in rectifiers can be detected, but I do believe that there can be EMI benefits by selecting the correct rectifier diode.

Are Schottky diodes quieter/softer in terms of emissions than Ultrasoft? What exactly are HEXFREDs?

roddyama · 19th April 2004, 10:35 AM

There's a lot of links on this subject.

High Speed Diodes
Power Supply Freds, Hexfreds, Ultrasofts, Ultrafasts and Fast Recovery
Using discrete diodes instead of rectifying bridges.
Rectifiers for the GC

This is just the tip of the iceburg.

roibm · 19th April 2004, 11:18 AM

I think it is the time to implement two checkboxes for confirming that you've seached before being allowed to post

just a tip

richie00boy · 19th April 2004, 12:17 PM

Cheers guys.

Just like to point out that I did search. I get annoyed myself when I see people posting that is obvious stuff that could be easily searched for, so I triued hard not to fall victim to this. Unfortunately there's so much 'noise' to wade through I still didn't find definitive answers when I tried.

One of those links roddyama posted was good though and has helped a lot

MBR20200 looks like a good choice.

fcel · 19th April 2004, 12:38 PM

Regarding searching on this forum, very often I get frustrated too.

It's just like getting a loan from the bank. If you want to borrow some money, you have to prove to the bank that you don't need it.

If you want to search something, you have to have read it somewhere here previously. Otherwise you won't know where to start, especially if you are new here.

Anyway, just my thoughts and I have always wanted to mention it.

ClassD · 19th April 2004, 01:05 PM

Quote:

Originally posted by richie00boy
I don't believe that the sound of different diodes used in rectifiers can be detected, but I do believe that there can be EMI benefits by selecting the correct rectifier diode.

Are Schottky diodes quieter/softer in terms of emissions than Ultrasoft? What exactly are HEXFREDs?

Seriously I don't see what the diffrence would be at 50/60Hz.

grataku · 19th April 2004, 01:41 PM

Quote:

Originally posted by ClassD

Seriously I don't see what the diffrence would be at 50/60Hz.

That's not the way life works, young man.

You got a lot of reading to do.

19th April 2004, 09:14 AM	#1
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Rectifier Diodes I don't believe that the sound of different diodes used in rectifiers can be detected, but I do believe that there can be EMI benefits by selecting the correct rectifier diode. Are Schottky diodes quieter/softer in terms of emissions than Ultrasoft? What exactly are HEXFREDs?

19th April 2004, 10:35 AM	#2
roddyama diyAudio Moderator Emeritus Join Date: Jan 2002 Location: Michigan	There's a lot of links on this subject. High Speed Diodes Power Supply Freds, Hexfreds, Ultrasofts, Ultrafasts and Fast Recovery Using discrete diodes instead of rectifying bridges. Rectifiers for the GC This is just the tip of the iceburg. __________________ Rodd Yamashita

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19th April 2004, 11:18 AM	#3
roibm Banned Join Date: Dec 2003 Location: Transylvania	I think it is the time to implement two checkboxes for confirming that you've seached before being allowed to post just a tip

19th April 2004, 12:17 PM	#4
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Cheers guys. Just like to point out that I did search. I get annoyed myself when I see people posting that is obvious stuff that could be easily searched for, so I triued hard not to fall victim to this. Unfortunately there's so much 'noise' to wade through I still didn't find definitive answers when I tried. One of those links roddyama posted was good though and has helped a lot MBR20200 looks like a good choice.

19th April 2004, 12:38 PM	#5
fcel diyAudio Member Join Date: Sep 2001 Location: LA County	Regarding searching on this forum, very often I get frustrated too. It's just like getting a loan from the bank. If you want to borrow some money, you have to prove to the bank that you don't need it. If you want to search something, you have to have read it somewhere here previously. Otherwise you won't know where to start, especially if you are new here. Anyway, just my thoughts and I have always wanted to mention it.

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