PS for microphone preamp

kubeek · 23rd April 2008, 09:38 AM

I want to build a +-15V, 300mA power supply.
I think I will use a CLC filter after the bridge to get rid of line garbage, and some voltage reguator.
What values for the CLC do you recommend?

Is there anything better than 78xx reugators, in terms of produced noise and reguation?

kubeek · 24th April 2008, 07:46 PM

Anyone?

spzzzzkt · 24th April 2008, 09:31 PM

Have a peek around at the Prodigy-Pro forums.

The Power Supplies meta-list is probably a good starting point:
http://www.prodigy-pro.com/forum/viewtopic.php?t=2665

gain · 28th April 2008, 05:55 AM

you could use a filter calculator, such as this one

http://www.pronine.ca/butlf1.htm

to find the values for L and C. If you own or can borrow a copy of, "The Art of Electronics" there are tables and equations in the back of that book that can be used to design LC filters.

23rd April 2008, 09:38 AM	#1
kubeek diyAudio Member Join Date: Dec 2005 Location: Prague, Czech Rep	PS for microphone preamp I want to build a +-15V, 300mA power supply. I think I will use a CLC filter after the bridge to get rid of line garbage, and some voltage reguator. What values for the CLC do you recommend? Is there anything better than 78xx reugators, in terms of produced noise and reguation?

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24th April 2008, 07:46 PM	#2
kubeek diyAudio Member Join Date: Dec 2005 Location: Prague, Czech Rep	Anyone?

24th April 2008, 09:31 PM	#3
spzzzzkt diyAudio Member Join Date: May 2005 Location: Melbourne	Have a peek around at the Prodigy-Pro forums. The Power Supplies meta-list is probably a good starting point: http://www.prodigy-pro.com/forum/viewtopic.php?t=2665

28th April 2008, 05:55 AM	#4
gain diyAudio Member Join Date: Apr 2008	you could use a filter calculator, such as this one http://www.pronine.ca/butlf1.htm to find the values for L and C. If you own or can borrow a copy of, "The Art of Electronics" there are tables and equations in the back of that book that can be used to design LC filters.

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