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Better psu than sigma 11?

post #1 of 26
12/10/10 at 12:56pm
Thread Starter 

I borrowed the sigma 11 for some days, and hooked to modedd emu 04040 usb.

 

The sigma 11 made big upgrade to sound from lm7805 psu.

 

Is there a better psu than the great sigma 11?

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post #2 of 26
12/10/10 at 1:02pm

If you find one let me know :P

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post #3 of 26
12/10/10 at 1:39pm

Salas LV shunt regulator (see diyaudio).

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post #4 of 26
12/10/10 at 1:50pm

Only possibly better if you need < 200ma no?  Then again that might be plenty for an emu 0404usb, but not for my purposes :(

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post #5 of 26
12/10/10 at 3:02pm

The now discontinued Tangent YJPS  measures better for noise and has a 4 wire remote feedback option that allows for better precision.

The YJPS is a high drop out design and it takes some compromises to configure the output less than about 7 volts.

It doesn't have nearly the current capacity of the s11. There was no dual rail tracking version of the YJPS as there is with the s11 / s22.

 

"Better" depends on application. It is a loss that the YJPS was discontinued, it was a neat piece of kit.

I have one configured as a  5.1v psu for a y2, probably very similar to your 0404 application.

It is a very worthwhile upgrade to a tread style psu I was using.


Edited by bada bing - 12/10/10 at 3:10pm
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post #6 of 26
12/10/10 at 3:58pm

I did my own testing between a sigma and placid bipolar shunt, using different switching loads and various amps, both using the same input voltages & transformers, and loads, etc. Admittedly one is designed to deliver amps and the other milliamps.  The shunt can not hold a light for the Sigma to see by. Check me, but I think the Sigma has an unloaded noise of ~12uA.

 

In all my tinkering, I've yet to see anything as rock solid as the Sigma. Every aspect works. Voltage that doesn't drift with line fluctuations(provided you spec your transformer properly). Rails that track, which works better than anything else(again, in my limited tinkering) for offset drift. No current limiting. Unless you have a power supply that is built and tuned for a very narrow and specific application, I don't see how you could go wrong with a Sigma.

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post #7 of 26
12/11/10 at 1:41am

Quote:

Originally Posted by BebopMcJiggy View Post

Only possibly better if you need < 200ma no?  

 


Not really. Depends on part choices and heatsinks.

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post #8 of 26
12/11/10 at 4:52am

borbely all fet super shunt, salas shunt V1.2R

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post #9 of 26
12/12/10 at 3:31am

NGRa.jpg

 

The most popular one in Taiwan, UCC's "Golden Referencce".

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post #10 of 26
12/12/10 at 6:53am

Here is a li nk to the UCC Golden Reference.

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post #11 of 26
12/12/10 at 7:15am

Or the English site:

 

http://circulator.bravehost.com/Gminireg.htm

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post #12 of 26
12/12/10 at 7:31am

Looks like a nice, small PSU. Any link to order it?

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post #13 of 26
12/12/10 at 7:38am

There is a link to contact "coffin" at the bottom of this page:

 

http://circulator.bravehost.com/index.html

 

Quick response when I dealt with him.

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post #14 of 26
12/12/10 at 8:15am

any comparison so far?

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post #15 of 26
12/12/10 at 8:20am

I'm using the coffin minigold to power my D1, its quite nice, most jung type super reguators dont handle higher voltage or current, but this one is a bit different due to using power transistors as the pass devices and allowing the use of higher voltage opamps. it doesnt have any sense/kelvin connections, but works quite well. not much room on the PCB for parts choice changes, but i;ve had good results so far using it for +/-45vout at 1.2A

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