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Old 1st August 2008, 12:38 AM   #1
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Default 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!!
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Old 1st August 2008, 06:22 AM   #2
Nuuk is offline Nuuk  United Kingdom
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In my opinion yes, dual mono is always an improvement. Of course how much of an improvement depends on the rest of your system!
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Old 2nd August 2008, 03:16 PM   #3
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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,
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Old 2nd August 2008, 03:48 PM   #4
AndrewT is offline AndrewT  Scotland
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did Carlos specify the 338?
using a 317 will not be as per Carlos!
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Old 2nd August 2008, 04:01 PM   #5
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Oops...
My apologies..
I shouldn't ask...
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Old 2nd August 2008, 05:17 PM   #6
Nuuk is offline Nuuk  United Kingdom
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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.
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Old 6th August 2008, 01:36 PM   #7
Inch-o is offline Inch-o  Slovenia
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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....
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Old 6th August 2008, 02:00 PM   #8
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Hi Nuuk.. Hi Inch-O..

Many thanks for the clarification and advise.
Will switch to LM338 accordingly then... )

Kind regards,
Dino Ary
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Old 6th August 2008, 03:00 PM   #9
Nuuk is offline Nuuk  United Kingdom
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Actually, if you want to use LM317, it is not out of the question. Have a look here .
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Old 6th August 2008, 03:59 PM   #10
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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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