Computer Audio Asylum

Music servers and other computer based digital audio technologies.

Return to Computer Audio Asylum

Message Sort: Post Order or Asylum Reverse Threaded

Juli@ external PSU/batteries

84.58.45.168
Posted on March 28, 2009 at 08:44:10
sonics
Audiophile

Posts: 116
Joined: July 6, 2008



Hi,
i found a solution to go directly into the juliboard with 3,3 Volt, which is the only needed tension for the digital section.
On the opposite side from the outpust there is an voltage regulator U1 from 5 to 3.3 volt, who can be unsoldered and we are able to feed 3,3 Volt ( four 6 volt batteries parallel via a thel regulator to 3,3 volt)to the board as You can see on the photo.
Sounds phantastic and is a real big step.
More depht, information and dynamics without any increase of harshness.
Highly recommended.
bye
alfred


my current stuff;
CMP/Cplay, PC with separated PSU for P4, P24, HD and Fans (Batteries for P4)
Julia I2S to buffalo( batterie PSU) to Zapfilter and to Tripath 2021 (batterie PSU)

 

Hide full thread outline!
    ...
What kind of regulator?, posted on March 29, 2009 at 10:07:09
rickmcinnis@dogwoodfabrics.com
Audiophile

Posts: 3040
Location: Atlanta
Joined: December 15, 2003
 Alfred,

I am not sure what kind of regulator that would be.

Also, are you using lead acid 6 volts batteries? What rating?

Thanks,

Rick McInnis

 

RE: What kind of regulator?, posted on March 29, 2009 at 14:10:05
sonics
Audiophile

Posts: 116
Joined: July 6, 2008
 Hi Rick
i use 4 12Volt 7,2 A Panasonics which are downsized to 3,3 Volt by a regulator from a german provider
http://www.thel-audioworld.de/module/spr/SPR-2.htm
You can use 6 Volt batteries without any problem.
Sound is really phantastic, one of the biggest steps in PC-tweaking.
bye
alfred

 

RE: Juli@ external PSU/batteries, posted on March 30, 2009 at 09:20:55
promethk
Audiophile

Posts: 46
Joined: August 6, 2008
 Very nice findings!

I also tried various mods on the Juli@ and come to the conclusion that the PCI bus 5V from the motherboard is pretty contaminated. While the header-power mod can provide a few decibels noise reduction, it could not reach any "start-of-the-art" results.

It seems that you have also tried the Xonar card, so is the Juli@ with I2S much than the PCI-E Xonar STX ?

 

RE: Juli@ external PSU/batteries, posted on March 30, 2009 at 09:28:06
sonics
Audiophile

Posts: 116
Joined: July 6, 2008
 i tried the xonar with an external PS ( also batteries) and it was better than the untweaked Juli@ in the SPDIF-setion.
The next step was Juli@ in the I2S mode: much better than Xonar over Spdif.
Now the Juli@ >>I2S and batteriepowered plays in a comletely other league.

 

RE: Juli@ external PSU/batteries, posted on March 30, 2009 at 09:31:51
Kaedrin


 
Thank you for sharing this great finding!

Can you please post a pic of your Juli@ wired to an battery PSU? It will be much appreciated.

 

RE: Juli@ external PSU/batteries, posted on March 30, 2009 at 10:10:33
sonics
Audiophile

Posts: 116
Joined: July 6, 2008



Juliamod:

 

RE: Juli@ external PSU/batteries, posted on April 1, 2009 at 10:41:16
Kaedrin


 
Thank you for taking the time to give the detailed instructions, though I was more looking forward to a picture of the Juli@ and its PSU in your system.

 

RE: What kind of regulator?, posted on April 2, 2009 at 13:20:44
hanssatink
Audiophile

Posts: 79
Joined: September 13, 2008



I did it like this:

 

RE: Juli@ external PSU/batteries, posted on April 2, 2009 at 17:11:07
SashaV
Audiophile

Posts: 273
Joined: September 25, 2006
 Has anyone tried this with Lynx sound card?

 

RE: Juli@ external PSU/batteries, posted on April 3, 2009 at 11:16:33
sondale
Audiophile

Posts: 100
Location: Surrey
Joined: July 28, 2008
 Hi - this may be a dumb question but I was just wondering why 4 x 6volt batteries? Are they in series or parallel? I assumed parallel to give a more solid supply.

I have tried to read the page on the regulator you mentioned - unfortunately my German is about as good as my French (non-existant!!).

I get the gist of what they are saying - the diagrams do help a lot.

 

RE: Juli@ external PSU/batteries, posted on April 3, 2009 at 14:16:52
sonics
Audiophile

Posts: 116
Joined: July 6, 2008
 hi,
four batteries for the SQ!! .
One sealed acid batterie will sound clean but dull. If You take 3 or 4 prarallel ( i take 8 for my tripath Amp) you lower the inner resistance (like the effekt of low ESR caps) and it sounds better than any PS i know.Try it and you never go back to normal PS`s.
I work with batteries for 15 years and use them for amps DAC and PC and the inconvenience of charging is nothing against SQ.

 

RE: Juli@ external PSU/batteries, posted on April 3, 2009 at 15:11:14
sondale
Audiophile

Posts: 100
Location: Surrey
Joined: July 28, 2008
 Thanks sonics - I will certainly try this mod - in the UK the Panasonics seem to be difficult to get - looks like I will have to order from the States.

 

RE: Juli@ external PSU/batteries, posted on April 4, 2009 at 00:21:02
sonics
Audiophile

Posts: 116
Joined: July 6, 2008
 hi sondale ,
the problem of comparing batteries with PSUs is that most of the DYIs use one batterie and thats the end of the story.
The brand of the batteries is not as important as the number of the batteries. There is a difference in the inner resistance of certain batteries ( Low ESR Optoma or northstar long life expectance, but 200€ for one) but if you take four cheap ones you get 1/8 of inner resistance of one
You will hear the difference.The biggest effect is in combination with Class-D Amps.My new combo blows away my old 20.000€ tube amp.But also the buffalo, the Juli@ my zap-outputstage and the pc are on much higher level than with conventional PSUs.
If You decide to do it You take four 6 Volts parallel to a regulator ( thel or like hanssatink did it) and do the charging when you stop playing with a constant voltage source at 6,9 Volt , so there is no problem of overcharging and the charger can be connected all the time.Full charging is at 7,2 Volt.
bye
alfred

PS: i compared NiMH ,Lithium and normal alkalines and the paralleled sealed acid are the winner.

 

RE: Juli@ external PSU/batteries, posted on April 4, 2009 at 02:41:12
Ryelands
Audiophile

Posts: 1867
Location: Scotland
Joined: January 9, 2009
 alfred wrote:

but if you take four cheap ones you get 1/8 of inner resistance of one

Your argument is generally sound but the total internal resistance of four batteries in parallel is a quarter, not an eighth, of the IR of each.

1/R tot = 1/R1 + 1/R2 + 1/R3 + 1/R4 . . .

I know this is off-topic but my experience is that a Tripath-based amp sounds much poorer running at 12 volts than at 13.5 - which is why many owners use linear PSUs designed for CB radio. Comments?

Dave

 

RE: Juli@ external PSU/batteries, posted on April 4, 2009 at 07:33:54
hanssatink
Audiophile

Posts: 79
Joined: September 13, 2008
 "I know this is off-topic but my experience is that a Tripath-based amp sounds much poorer running at 12 volts than at 13.5 - which is why many owners use linear PSUs designed for CB radio. Comments?"

I disagree. Tried 12 volt batterie and full loaded same 13,6 batterie.
No hearable difference. Low voltage D-amps are current suppliers. The ESR must be as low as possible, so there is no voltage drop when charging the amp.

Have put 20 high grade capacitors (Panasonic FM's) 1000 uf parallel to the PS entrance of the t-amp chip.

 

RE: Juli@ external PSU/batteries, posted on April 4, 2009 at 12:43:03
sonics
Audiophile

Posts: 116
Joined: July 6, 2008
 offtopic but you are right, i use 8 batteries with my tripath 2021 and so it is 1/8.
The tripath 2021 with 12,64V is as good as with 13,8 because i use it with a 98 dBH loudspeaker , so it don't reach the limit of distorsion.

 

RE: Jui@ 3.3V reg. current draw, posted on April 22, 2009 at 22:43:45
Alain
Audiophile

Posts: 13
Location: Switzerland
Joined: September 22, 2002
 Hi,
Great thread.
I'm also very please with Sabbre DAC, but I want to try a Paul Hynes's 3.3V shunt reg. Does anyone has an idea or measured the current draw of the ESI Juli@'s digital section ?
All the best to everyone,
Alain

 

RE: Juli@ external PSU/batteries, posted on April 24, 2009 at 08:30:25
sonics
Audiophile

Posts: 116
Joined: July 6, 2008
 New approach:
Lithium ferrite polymer batteries deliver 3,3 Volt, so we can go directly to the Juli@ digital section without any regulator.
Didn't believe it before, but the regulator destroys the sound . Without much better SQ.

 

RE: Juli@ external PSU/batteries, posted on April 24, 2009 at 09:00:59
theob
Audiophile

Posts: 3180
Location: ann arbor michigan
Joined: November 4, 2000
 you piqued my interest. Say more about type of batteries, cost, how long do they last, do you use several in parallel?

 

RE: Juli@ external PSU/batteries, posted on April 24, 2009 at 09:12:15
sonics
Audiophile

Posts: 116
Joined: July 6, 2008
 i use 2 parallel ,but one works flawless for more than two days.
http://shop.lipopower.de/A123-Systems-M1-2300-mAh-1s1p-Einzelzelle-Loetfahne

 

RE: Juli@ external PSU/batteries, posted on April 24, 2009 at 13:34:02
theob
Audiophile

Posts: 3180
Location: ann arbor michigan
Joined: November 4, 2000
 one more thing are they rechargeable?

 

RE: Juli@ external PSU/batteries, posted on April 24, 2009 at 16:10:46
sonics
Audiophile

Posts: 116
Joined: July 6, 2008
 Yes, 3,65 Volt < 5 A

 

RE: Jui@ 3.3V reg. current draw: 122 mA, posted on April 27, 2009 at 03:34:23
Alain
Audiophile

Posts: 13
Location: Switzerland
Joined: September 22, 2002
 I measured it: 122mA idle and working.
Alain

 

RE: Juli@ external PSU/batteries, posted on May 1, 2009 at 10:29:10
sondale
Audiophile

Posts: 100
Location: Surrey
Joined: July 28, 2008
 sonics - having got all the 6v batteries and preparing to modify the Julia - too late I read your email.

So where do you get these lithium polymer batteries - all I have found are 3.7v - are these acceptable? A manufacturers code would help.

Alan

 

RE: Juli@ external PSU/batteries, posted on May 1, 2009 at 13:52:22
sonics
Audiophile

Posts: 116
Joined: July 6, 2008
 Sorry,
but trying and ( error) is going on. the difference in SQ is worth the lipofer upgrade.
http://shop.lipopower.de/A123-Systems-M1-2300-mAh-1s1p-Einzelzelle-Loetfahne

 

RE: Juli@ external PSU/batteries, posted on May 1, 2009 at 15:10:36
sondale
Audiophile

Posts: 100
Location: Surrey
Joined: July 28, 2008
 and I am grateful for your experimenting! Couple of these batteries ordered.

Alan

 

RE: Juli@ external PSU/batteries, posted on May 2, 2009 at 00:04:55
sonics
Audiophile

Posts: 116
Joined: July 6, 2008
 Hi Alan
some additional informations.
Lipofer can be charged with 3,65 Volt typical for full loading, but also up to 4,1 ( shorter life) . I tried feeding Julia with fresh charged batteries ( 3.6) and she didn't suffer, but i am far away to recommend it.
So what to do?
Charge it with 3,65 limited with 1 Ampere , so you are far away from overcharging, or take a special lipofer charger (~130€). Before connecting´to Julia discharge for a short time with a 3-5 Ohm Resistor to lower Voltage.

Probably the easiest way ( my way now): give it a intermittend charge with 3,4 Volt and so there is no danger for the Julia.

 

RE: Juli@ external PSU/batteries, posted on May 3, 2009 at 04:06:24
hanssatink
Audiophile

Posts: 79
Joined: September 13, 2008
 I wonder what causes the positive effect with use of the A123 battery directly feeding the juli@?

I have 2 times 1000uf pana FM paralleled at the output of the 3v3 regulator on the juli@ card.
The regulator input is feeded with 6 volt battery.

If low esr is what matters it should be equal or maybe better with paralleled low esr HQ elco's.

If there is a difference in sound like Sonics hear, wich i sure believe, how would that technical be explained??

Anyone?

 

RE: Juli@ external PSU/batteries, posted on May 3, 2009 at 04:37:43
sonics
Audiophile

Posts: 116
Joined: July 6, 2008
 hi folks,
i don't really know!!!
but perhaps the following:

1. lipofers very low ESR ( 1 batterie 10mOhm ,4 batteries parallel 2,5mOhm)
and if i remember the best sealed acids are about 30 to 40mOhms.

2. Avoiding the voltage regulator.
Interesting Question : What's about the ESR BEHIND a regulator.


My batteries for my Amp are Panasonics LC-P127R2P
Internal resistance Fully charged battery
(25°C) Approx. 40mΩ ( i use 8 so i get 5mOhm)

These new types from Panasonic offer much lower ESR.
EC-FV1238:
Internal resistance At full charge About4.5mΩ
what is comparable with LIPOFERs but at 200 to 300€ instead of ~30€.

 

RE: Juli@ external PSU/batteries, posted on October 1, 2009 at 16:45:15
ForgotPassword
Audiophile

Posts: 87
Joined: September 21, 2009
 Is cutting the PCI 5v supply mandatory for this mod? Thank you in advance!
"We should no more let numbers define audio quality than we would let chemical analysis be the arbiter of fine wines." N.P.

 

RE: Juli@ external PSU/batteries, posted on October 3, 2009 at 18:34:18
jkeny
Manufacturer

Posts: 502
Joined: May 4, 2001
 Hi Sonics,
I have the exact same batteries for powering my DACs - bought them for powering a Sabre DAC that I'm building. Are you powering your Buffalo with these also? Is there a noticeable difference between 1 & 2 paralleled?

S. Schmidlin, from Audio Consulting, is using these batteries for powering all his audio equipment, amplifiers, preamps, turntable, etc.

 

Page processed in 0.032 seconds.

[ Top Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2024, Audio Asylum, all rights reserved ]
[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]