Snubberized Regulated Supply

Dino-Indo · 1st August 2008, 12:38 AM

All,

I'm planning to build a snubberised regulated PS as per Carlos FM design for my next LM3876 project.

Using the Carlos FM PS circuit, would it be beneficial for the sound quality if I instal 2 (two) 3Amp EI transformers instead of one trafo only?

Many many thanks in advance!!

Nuuk · 1st August 2008, 06:22 AM

In my opinion yes, dual mono is always an improvement. Of course how much of an improvement depends on the rest of your system!

Dino-Indo · 2nd August 2008, 03:16 PM

Hi Nuuk...

Thanks for your advise

... in deed the overall system does count.. plus the listening environment too

Couple of questions:
1) Instead of LM338.. can I use LM317? Honestly, this type is what I got for the time being...

2) I try to follow the component layout of regulated PS from your website

... but a bit confused.. So, the negative rail will use adjustment leg of the regulator, right(not the output leg)?

Look forward to have your further advise,

Kind regards,

AndrewT · 2nd August 2008, 03:48 PM

did Carlos specify the 338?
using a 317 will not be as per Carlos!

Dino-Indo · 2nd August 2008, 04:01 PM

Oops...

My apologies..

I shouldn't ask...

Nuuk · 2nd August 2008, 05:17 PM

LM317 won't handle the current. Stick to the exact circuit or you could land up in trouble!

BTW, I personally prefer the Pedja Rogic regulated GC.

Inch-o · 6th August 2008, 01:36 PM

The LM338, is a 10Amp max, 7Amp continuous positive adjustable voltage regulator.
It is the simplest way to implement a high current power supply. If you want to use the 317, the circuit will be much more complicated due to the need of adding an external power transistor....

Dino-Indo · 6th August 2008, 02:00 PM

Hi Nuuk.. Hi Inch-O..

Many thanks for the clarification and advise.

Will switch to LM338 accordingly then... )

Kind regards,
Dino Ary

Nuuk · 6th August 2008, 03:00 PM

Actually, if you want to use LM317, it is not out of the question. Have a look here .

Dino-Indo · 6th August 2008, 03:59 PM

Hi Nuuk..

Again.. many thanks for your help..
Very interesting and tempting to try..

Kind regards,
Dino Ary

PS: Another challenge though... hehehe... quite difficult (and might be expensive) to get tantalum caps as well as some of the transistors in Jakarta...

1st August 2008, 12:38 AM	#1
Dino-Indo diyAudio Member Join Date: Jan 2007	Snubberized Regulated Supply All, I'm planning to build a snubberised regulated PS as per Carlos FM design for my next LM3876 project. Using the Carlos FM PS circuit, would it be beneficial for the sound quality if I instal 2 (two) 3Amp EI transformers instead of one trafo only? Many many thanks in advance!!

1st August 2008, 06:22 AM	#2
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	In my opinion yes, dual mono is always an improvement. Of course how much of an improvement depends on the rest of your system! __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

2nd August 2008, 03:48 PM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	did Carlos specify the 338? using a 317 will not be as per Carlos! __________________ regards Andrew T.

2nd August 2008, 05:17 PM	#6
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	LM317 won't handle the current. Stick to the exact circuit or you could land up in trouble! BTW, I personally prefer the Pedja Rogic regulated GC. __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

6th August 2008, 03:00 PM	#9
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	Actually, if you want to use LM317, it is not out of the question. Have a look here . __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.


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2nd August 2008, 03:16 PM	#3
Dino-Indo diyAudio Member Join Date: Jan 2007	Hi Nuuk... Thanks for your advise ... in deed the overall system does count.. plus the listening environment too Couple of questions: 1) Instead of LM338.. can I use LM317? Honestly, this type is what I got for the time being... 2) I try to follow the component layout of regulated PS from your website ... but a bit confused.. So, the negative rail will use adjustment leg of the regulator, right(not the output leg)? Look forward to have your further advise, Kind regards,

2nd August 2008, 04:01 PM	#5
Dino-Indo diyAudio Member Join Date: Jan 2007	Oops... My apologies.. I shouldn't ask...

6th August 2008, 01:36 PM	#7
Inch-o diyAudio Member Join Date: Aug 2008	The LM338, is a 10Amp max, 7Amp continuous positive adjustable voltage regulator. It is the simplest way to implement a high current power supply. If you want to use the 317, the circuit will be much more complicated due to the need of adding an external power transistor....

6th August 2008, 02:00 PM	#8
Dino-Indo diyAudio Member Join Date: Jan 2007	Hi Nuuk.. Hi Inch-O.. Many thanks for the clarification and advise. Will switch to LM338 accordingly then... ) Kind regards, Dino Ary

6th August 2008, 03:59 PM	#10
Dino-Indo diyAudio Member Join Date: Jan 2007	Hi Nuuk.. Again.. many thanks for your help.. Very interesting and tempting to try.. Kind regards, Dino Ary PS: Another challenge though... hehehe... quite difficult (and might be expensive) to get tantalum caps as well as some of the transistors in Jakarta...

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