LM3886 PSU , need

funky2x · 20th December 2008, 04:29 AM

Buliding LM3886 two channel
after seeing a lot of designs about PSU for LM3886 . am Stuck
any recommended one to bulid ?
1-Dual recetifier bridges and 2x10000uf .
2-Lm317 , Lm337 .
Any ?

ratza · 20th December 2008, 10:08 AM

Make the first one, unregulated. If you want to make upgrades and use a regulated PSU, you can do it afterwards. I tested mine with both my unregulated PSU and with the power supply from the image and I coudn't hear any sound difference.

AndrewT · 20th December 2008, 10:48 AM

Hi,
keep the first build very simple, but don't omit components without a good reason.

After you have the simple one working, then you can experiment with add ons and nice to haves.

Ted205 · 20th December 2008, 06:59 PM

i agree with what andrewT has said above. Getting a quiet amp, i.e no hum or buzz, is the first hurdle and then progress from there

funky2x · 21st December 2008, 03:30 AM

thank you
no schematic !!!!!!!!!!!!
any link to build a good PSU for .

udailey · 21st December 2008, 03:41 AM

LM338 regulated snubberized PSU for audio amplifiers

ratza · 21st December 2008, 06:44 AM

There's a sticky thread for PSU on this section, have looked over it?

Ted205 · 21st December 2008, 11:31 AM

i would stay away from linear regulators too but thats really up to you

funky2x · 21st December 2008, 11:56 AM

after testing with one travo center tap and one rectifier brdidge
the sound is better than using two rectifier bridgs ( somthing like snubber )
on the two rectifier bridges I used two travo .
still more willing to hear ideas and suggestions about PSU .
thanks for all and this Great Site

ratza · 21st December 2008, 01:31 PM

Mine is very simple. Two secondaries, two rectifiers and 3 x 4700uF per rail. 47nF parallel per each diode on the bridge and 100nF paralel with the bottles

20th December 2008, 04:29 AM	#1
funky2x diyAudio Member Join Date: Jan 2008	LM3886 PSU , need Buliding LM3886 two channel after seeing a lot of designs about PSU for LM3886 . am Stuck any recommended one to bulid ? 1-Dual recetifier bridges and 2x10000uf . 2-Lm317 , Lm337 . Any ?

20th December 2008, 10:08 AM	#2
ratza diyAudio Member Join Date: Dec 2007 Location: Sibiu, Romania	Make the first one, unregulated. If you want to make upgrades and use a regulated PSU, you can do it afterwards. I tested mine with both my unregulated PSU and with the power supply from the image and I coudn't hear any sound difference. __________________ Any solution is a compromise.

20th December 2008, 10:48 AM	#3
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, keep the first build very simple, but don't omit components without a good reason. After you have the simple one working, then you can experiment with add ons and nice to haves. __________________ regards Andrew T.

21st December 2008, 03:41 AM	#6
udailey Passive Aggressive diyAudio Member Join Date: Mar 2008	LM338 regulated snubberized PSU for audio amplifiers __________________ You can purchase LDRs anytime to build a standard LDR attenuator or to build my new LDR Attenuator "A Lighter Note". Email me. diyldr@gmail.com

21st December 2008, 06:44 AM	#7
ratza diyAudio Member Join Date: Dec 2007 Location: Sibiu, Romania	There's a sticky thread for PSU on this section, have looked over it? __________________ Any solution is a compromise.


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20th December 2008, 06:59 PM	#4
Ted205 diyAudio Member Join Date: Jun 2008	i agree with what andrewT has said above. Getting a quiet amp, i.e no hum or buzz, is the first hurdle and then progress from there

21st December 2008, 03:30 AM	#5
funky2x diyAudio Member Join Date: Jan 2008	thank you no schematic !!!!!!!!!!!! any link to build a good PSU for .

21st December 2008, 11:31 AM	#8
Ted205 diyAudio Member Join Date: Jun 2008	i would stay away from linear regulators too but thats really up to you

21st December 2008, 11:56 AM	#9
funky2x diyAudio Member Join Date: Jan 2008	after testing with one travo center tap and one rectifier brdidge the sound is better than using two rectifier bridgs ( somthing like snubber ) on the two rectifier bridges I used two travo . still more willing to hear ideas and suggestions about PSU . thanks for all and this Great Site

21st December 2008, 01:31 PM	#10
ratza diyAudio Member Join Date: Dec 2007 Location: Sibiu, Romania	Mine is very simple. Two secondaries, two rectifiers and 3 x 4700uF per rail. 47nF parallel per each diode on the bridge and 100nF paralel with the bottles __________________ Any solution is a compromise.

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