Best Power Supply for Pass Labs Aleph (X)Ono - diyAudio
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Old 24th March 2010, 04:09 AM   #1
dtm1962 is offline dtm1962  Canada
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Default Best Power Supply for Pass Labs Aleph (X)Ono

I have noticed three types of power supplies for this fine series of phono preamps:
1) Mosfet Output/Lower PS Cap. (8000uF) & as standard for the Aleph Ono
2) LM317/337 Regulator based with higher PS Cap. (>40000uF) for the (X)ONO Clone
3) Possiblly dual 7815 & 7915 configured to create +/-30V Reg ($ >120000uF) for XONO

In your opinion (ignoring the benefits of a dedicated power supply for ech channel as used in the XONO & (X)ONO clone) which configuration is considered the superior regulated power supply?

What the benefits and disadvantages of each configuration in regards to sound quality benefits?

Any input/experience would be appreciated.

Thanks in advance....
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Old 24th March 2010, 03:51 PM   #2
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I'd like to hear what people think on this subject as well. To add another to the mix, what about a Salas shunt reg?

Fran
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Old 24th March 2010, 03:59 PM   #3
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Default Supply

I used this schematic :-)
Super High precision shunt regulator.

Thanks
Anadigit
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File Type: jpg shunt1.jpg (70.7 KB, 765 views)
File Type: jpg shunt2.jpg (50.2 KB, 724 views)
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Old 24th March 2010, 06:42 PM   #4
h_a is offline h_a  Europe
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The Ono is not particularly sensitive to the power supply as the MC head amp already has a capacitance multiplier. If you really want to improve things, replace the cap multiplier with maybe one of these opamp shunt regs. But then you would need to do your own pcb-artwork...

Have fun, Hannes

PS: remember to place the regulators always close to the load - a regulated psu in an external enclosure is only a sign that no regulated PSU is needed
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Old 24th March 2010, 07:33 PM   #5
Zen Mod is offline Zen Mod  Serbia
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few German fellows use this :
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File Type: gif The-Shunty-for-OnO.gif (49.9 KB, 691 views)
File Type: jpg OnO-for-Shunty.jpg (191.3 KB, 690 views)
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Old 24th March 2010, 10:00 PM   #6
dtm1962 is offline dtm1962  Canada
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Where do you buy this Shunty Regulator board/ stuffed or without components?
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Old 2nd April 2010, 11:54 PM   #7
dtm1962 is offline dtm1962  Canada
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Quote:
Originally Posted by Zen Mod View Post
few German fellows use this :
Is there a commercially available Shunty Regulator PCB board available for the ONO?
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Old 15th April 2013, 09:33 AM   #8
McLanz is offline McLanz  Germany
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Default PSU XOno - what expirience ?

[QUOTE=dtm1962;2129468]1) Mosfet Output/Lower PS Cap. (8000uF) & as standard for the Aleph Ono
2) LM317/337 Regulator based with higher PS Cap. (>40000uF) for the (X)ONO Clone
3) Possiblly dual 7815 & 7915 configured to create +/-30V Reg ($ >120000uF) for XONO
QUOTE]

Hi Dan,

some time passed but I've got the same question

I build one XOno already for a friend which really could walk a consequent way in terms of parts, PSU etc...

I discussed the PSU section of XOno with Paul Hynes and I bought 4 regulators
PRDC types with regulation of voltage and current. It was quiete costy but the result as always with Pauls regs was stunning and doesn't bear ones questions in mind (can I improve the PSU -.. maybe the regs...)

***

OK but now my question to you Dan or to anyone else of course:

I'd like to build a Xono for my self too, but just a bit effordable in the first step.
- Did you find out Nelson's new 7815 schematics? (guess the small details maybe interesting here...)
- Did you try out some other regulators
?

Maybe you can share you're expieriences.


BTW for the German Shunty : I believe they had organised a small group buy, a few years before but just in Germany (Forum AAA).


Regards Jochen
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Old 15th April 2013, 11:04 AM   #9
Zen Mod is offline Zen Mod  Serbia
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not that I'm aware of , except in case that they made their own pcbs

sch is in public domain , anyway
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