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Dino-Indo 1st August 2008 01:38 AM

Snubberized Regulated Supply

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 07:22 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 04:16 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... :confused:

2) I try to follow the component layout of regulated PS from your website :D ... but a bit confused.. So, the negative rail will use adjustment leg of the regulator, right(not the output leg)? :confused:

Look forward to have your further advise,

Kind regards,

AndrewT 2nd August 2008 04:48 PM

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

Dino-Indo 2nd August 2008 05:01 PM

Oops... :clown:
My apologies.. :clown:
I shouldn't ask... :clown:

Nuuk 2nd August 2008 06:17 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 02:36 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 03:00 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 04:00 PM

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

Dino-Indo 6th August 2008 04:59 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...

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