Tweakers' Asylum

RE: replacing 1N4003 with better diode at power amp stage...advices pls

70.162.3.189

In Reply to: RE: replacing 1N4003 with better diode at power amp stage...advices pls posted by kalido on February 25, 2009 at 17:23:22

The best diodes you can use as rectifiers for your PS are the Cree Schottky diodes available from Parts Connection in several flavors : 2, 4, 6 & 10 Amp. Then install snubbers on the output of all your PS bridges with a 0.01 uF stacked film cap in series with a 4/8 ohm CC R across the output of the bridges with the cap on the + output for a + supply & the R connected to Gd. & visa-versa for a - output supply.

Happy Listening !

Follow Ups:

RE: replacing 1N4003 with better diode at power amp stage...advices pls - Hap 08:48:40 03/07/09 (0)
Have any of you tried using the Fairchild Semi "Stealth" diodes in this application.
Sounds like the combo of fast switching with soft recovery of these stealths would be of benefit vs. the Schottkys.
What do you guys think.
Cheers
RE: replacing 1N4003 with better diode at power amp stage...advices pls - zanash 08:14:02 03/01/09 (0)
you only need snubbers on switching diodes ...schottky's s a mass migration principle and therefore no reverse switching ie a snubber on the schottky's may inhibit their very good performance ....

having swapped more 1nxxxx diodes for schottky's than I'd like to admit to... its clear to me that the gear sounds better if you remove the snubbers often prviously fitted to tame the 1nxxxx diodes clicking .. this of course is only my opinion but I do thinkit sounds better
Why put snubbers on a Schottky rectifier? (nt) - wheezer 23:31:01 02/28/09 (3)
- RE: Why put snubbers on a Schottky rectifier? (nt) - Rob F 15:22:55 03/02/09 (2)
  Why use snubbers with schottky's? Well they don't produce a voltage spike when shutting off but the capacitance of the diode and the inductance of the transformer secondary form a tank circuit which is excited when the diode switches off...
  - Nonsense (nt) - wheezer 15:31:21 03/02/09 (1)
    - RE: Nonsense (nt) - Rob F 23:37:04 03/02/09 (0)
      Oh very mature...and incorrect as it happens. Perhaps if you researched the matter you would learn something.
Read the OP. These are not rectifiers but protection diodes. nt - clifff 14:42:30 02/27/09 (0)

Post a Followup:

FAQ

Post a Message!

Forgot Password?

Moniker (Username):
Password (Optional):
	Remember my Moniker & Password (What's this?) Eat Me
E-Mail (Optional):
Subject:

Message:	(Posts are subject to Content Rules)

Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:	Automagically notify you when someone responds.

To view your new posting or follow-up, click on the RELOAD or REFRESH button on your browser.

This post is made possible by the generous support of people like you and our sponsors:

Parts Connexion