Invisus ultra super regulator - Page 7

peranders · 5th September 2007, 02:41 PM

Can you elaborate your theories in practical terms? Have you actually designed a PS with 40 MHz bandwidth or more?

What do you mean "fast response time"? ns?

I have never seen a 100 MHz PS from China or anywhere, have you?

jimh0612 · 29th September 2007, 08:47 PM

Hi guys

Have been modding a Marantz CD63KI for some time but get totally confused by all the conflicting advice on regulators.

I have installed 4 simple LM317 based 5v regs using small tants for decoupling on small individual boards directly next to load around the DAC/Decoder section, which is after the caps etc on the PCB.

I have seen banks of these regs built on a board at the edge of the CDP and fed by twisted wires to the load.

I want to use better regs but my budget and skills are limited, so I think I need to build LM317/337 based regs with gyrators and use better decoupling/smoothing caps.

Is it better to have the reg as close to the load as possible?
Should I connect the reg through, say Blackgates to the load, and if so should the cap be nearest the reg or the load?

Hope you can sort me out because I keep coming back to this and asking on other threads but no one seems to want to answer.

Thanks in anticipation.

Jim

stef1777 · 30th September 2007, 10:30 AM

Quote:

Originally posted by jimh0612
Is it better to have the reg as close to the load as possible?
Should I connect the reg through, say Blackgates to the load, and if so should the cap be nearest the reg or the load?

Yes, better to have the regulator close to the load.

Caps: depends of the regulator. Look at the regulator datasheet for the type of caps to use. If you plan to reg digital, you can find many regulators better than the old LM317 (lower noise, faster transient).

Good luke.

jimh0612 · 1st October 2007, 08:58 AM

Thanks for that stef.

Any suggestions for replacements for the LM 317 for a 5v digital rail in a CD player?

Regards

Jim

stef1777 · 1st October 2007, 09:24 AM

Quote:

Originally posted by jimh0612
Thanks for that stef.

Any suggestions for replacements for the LM 317 for a 5v digital rail in a CD player?

Regards

Jim

LT1086 (or LM1086) will be a good upgrade. Others exist but pinout will not be the same.

I'm not sure that you will listen a difference specially on the 5v digital rail.

.

jimh0612 · 1st October 2007, 06:36 PM

OK thanks for the advice.

Jim

jackinnj · 20th January 2011, 02:04 PM

I ran the test again -- previously I had used 6V Alkalines -- this time a pair of motorcycle batteries:

jackinnj · 12th February 2011, 03:22 AM

Quote:

Originally Posted by jacco vermeulen

A Sulzer is a ship diesel engine, i guess this thing does not regulate diesel engines.

Just re-reading this ancient thread -- actually a purring diesel engine ain't bad !

alayn91 · 22nd February 2011, 10:31 AM

Hello,

For those who are interested, the complete collection of "L'audiophile" is here:
- index

But, only in french.

Regards.
Alain.

peranders · 22nd February 2011, 11:40 AM

Looks good but what is 0 dB? is it 1 V, 0.775 V or...?

5th September 2007, 02:41 PM	#61
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Can you elaborate your theories in practical terms? Have you actually designed a PS with 40 MHz bandwidth or more? What do you mean "fast response time"? ns? I have never seen a 100 MHz PS from China or anywhere, have you? __________________ /Per-Anders (my first name) or P-A as my friends call me

29th September 2007, 08:47 PM	#62
jimh0612 diyAudio Member Join Date: Oct 2006	newbie (ish) question Hi guys Have been modding a Marantz CD63KI for some time but get totally confused by all the conflicting advice on regulators. I have installed 4 simple LM317 based 5v regs using small tants for decoupling on small individual boards directly next to load around the DAC/Decoder section, which is after the caps etc on the PCB. I have seen banks of these regs built on a board at the edge of the CDP and fed by twisted wires to the load. I want to use better regs but my budget and skills are limited, so I think I need to build LM317/337 based regs with gyrators and use better decoupling/smoothing caps. Is it better to have the reg as close to the load as possible? Should I connect the reg through, say Blackgates to the load, and if so should the cap be nearest the reg or the load? Hope you can sort me out because I keep coming back to this and asking on other threads but no one seems to want to answer. Thanks in anticipation. Jim

22nd February 2011, 11:40 AM	#70
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Looks good but what is 0 dB? is it 1 V, 0.775 V or...? __________________ /Per-Anders (my first name) or P-A as my friends call me

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1st October 2007, 08:58 AM	#64
jimh0612 diyAudio Member Join Date: Oct 2006	Thanks for that stef. Any suggestions for replacements for the LM 317 for a 5v digital rail in a CD player? Regards Jim

1st October 2007, 06:36 PM	#66
jimh0612 diyAudio Member Join Date: Oct 2006	OK thanks for the advice. Jim

20th January 2011, 02:04 PM	#67
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	I ran the test again -- previously I had used 6V Alkalines -- this time a pair of motorcycle batteries:

22nd February 2011, 10:31 AM	#69
alayn91 diyAudio Member Join Date: Sep 2009	Hello, For those who are interested, the complete collection of "L'audiophile" is here: - index But, only in french. Regards. Alain.

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