< or = $700 Linear Power Supply Comparisons

0 Members and 1 Guest are viewing this topic. Read 30306 times.

fado

  • Jr. Member
  • Posts: 277
Re: < or = $700 Linear Power Supply Comparisons
« Reply #20 on: 22 Feb 2018, 11:27 pm »
Mojo can modify a factory reconditioned Joule v5.0 dual voltage model to 15V for $600. The Joule has recently been replaced by the Illuminati.

Johnny2Bad

Re: < or = $700 Linear Power Supply Comparisons
« Reply #21 on: 23 Feb 2018, 04:47 am »
Ripple is always voltage,

iFi 9V with 1A only has 0.15uV (ripple). And is cheap.

The cheap SMPS from Asia are very noisy and add noise to mains. Its proliferation is one of the causes of the electrical network having so much noise at present.

Exactly. Thus I quoted his values and asked for clarification (I already knew they were incorrect). And that introduces the question as to whether any of the data in that chart is correct.

maty

Re: < or = $700 Linear Power Supply Comparisons
« Reply #22 on: 23 Feb 2018, 08:50 am »
People are very satisfied with the iFi iPower.

https://ifi-audio.com/portfolio-view/accessory-ipower/

Tech specs:

Quote
5V/2.5A; 9V/2.0A; 12V/1.8A; 15V/1.2A

Noise*:    1uV

* Average audio band noise floor


or beatiful Line Power like:

Zero-Zone super-psu 30va 5V, 9V, 12V ...

https://www.ebay.com/itm/ZEROZONE-SUPER-PSU-30VA-DC12V-1-3A-Linear-Power-supply-LPS-for-Audio-Sources-/321924706372?_ul=AR

[IMG] https://i.ebayimg.com/images/g/rboAAOSwT4lWTUOa/s-l1600.jpg

R-core transformer

MOSFET output

VISHAY BYV27 (2A) rectifier

Nichicon KG TYPE II file 3300U

Very good trimpots (blue)

case with thick walls.

...

tubesguy2

Re: < or = $700 Linear Power Supply Comparisons
« Reply #23 on: 24 Feb 2018, 03:28 pm »
Exactly. Thus I quoted his values and asked for clarification (I already knew they were incorrect). And that introduces the question as to whether any of the data in that chart is correct.

The chart has the appearance of reporting, for each of the power supplies, measured ripple (in volts) for one or two measured current draws (in amps). Not really that difficult to understand, and fairly standard methodology for testing power supplies. Which values do you know were incorrect? 


mattking52

  • Jr. Member
  • Posts: 11
Re: < or = $700 Linear Power Supply Comparisons
« Reply #25 on: 25 Feb 2018, 09:09 pm »
A boutique power supply will give you totally awesome bragging rights.
But if all you need is pure clean linear regulated power then pick up a used Acopian B15G200 on eBay for $55 - $65.
The A15MT300 will give you a little more headroom and has tighter specs for a little more. You can also order new for a lot less than $500.
Acopian power supplies are made for 24/7 industrial use and will outlast any electronics you plug them into. You will need to make your own connector and power cord but that is super easy.





Acopian has other models to choose from
https://www.acopian.com/power-supply-voltages/15-volt-power-supplies.htm?search=15

Man, I use Acopian power supplies a lot in my design prototyping efforts at work (can't use them in the final product, usually, as I design electronics for spaceflight applications)... but somehow never considered trying them out in my home audio setups!  Might have to give this a shot...  they are extremely reliable, well-built, and usually very low-noise.

maty

Re: < or = $700 Linear Power Supply Comparisons
« Reply #26 on: 25 Feb 2018, 09:16 pm »
Re: DAC that will kill $6000 commercial DAC's for under $500

http://www.audiocircle.com/index.php?topic=155886.msg1668768#msg1668768

https://www.google.com/search?q=digikey+ac+dc+15v+converter+ultra+low+noise+medical

Sanken HWB030D-15

https://www.digikey.com/product-detail/en/sanken/HWB030D-15/HWB030D-15-ND/4486054

https://www.allegromicro.com/~/media/Files/Sanken/HWB-Series/HWB030D-15-Test-Data.ashx?la=zh-CN&hash=4A0AEB4A837C01E997CCF24747077BEF4235AE18

Quote
Features and Benefits

• Ripple noise: less than 5 mV P-P
• Conduction noise: lower than Class-B of CISPR by 20 DdB
• Radiation noise: Complies with Class-B of CISPR
Leakage current: 50 μA or less for medical use
• Safety mark for medical use: EN60601-1 3rd edition
• Safety standards: UL1950, CSA950, EN60950, and CE marking
• World-wide input range
• Parallel operation

oem-wheels

  • Jr. Member
  • Posts: 88
Re: < or = $700 Linear Power Supply Comparisons
« Reply #27 on: 25 Feb 2018, 10:10 pm »
What luck... this thread popped up at the same time I was looking for a power supply for my modem/router.. After reading this thread, one mentioned ZeroZone on eBay.. I need a 12 volt 3 amp unit.. I found ZeroZone and he didn't have one listed for my specs.. I contacted him and asked if he had one for me and he pointed out a 15 volt 3.5 amp unit.. I know the amp rating is ok but is the 15 volt, which is 3 volt more than I need, going to be ok ? Another post said to be cautious for voltage matching.. Or was that just for tubes ?

srb

Re: < or = $700 Linear Power Supply Comparisons
« Reply #28 on: 25 Feb 2018, 10:56 pm »
I know the amp rating is ok but is the 15 volt, which is 3 volt more than I need, going to be ok ?
No, 25% over-voltage is asking for trouble.  There are plenty of 12VDC / 3A - 5A linear power supplies available on eBay.

https://www.ebay.com/itm/ZEROZONE-100VA-12V-Ultra-Low-Noise-LPS-HI-END-Linear-Power-Supply-for-Audio/122554983852?hash=item1c88d8a5ac:g:98IAAOSwzvlW96K~

Here's a dual supply that can power two devices
https://www.ebay.com/itm/50VA-50VA-HIFI-Linear-power-supply-2-Way-LPS-DC-5V-9V-12V-15V-18V-19V-24V/122581492167?hash=item1c8a6d21c7:g:m-gAAOSw3YJZWfqN

oem-wheels

  • Jr. Member
  • Posts: 88
Re: < or = $700 Linear Power Supply Comparisons
« Reply #29 on: 25 Feb 2018, 11:50 pm »
Thanks srb... Funny though, why would ZeroZone point me in the wrong direction ? Maybe he's just a retailer and don't actually make them.. I guess I'll buy one from him anyway..

oem-wheels

  • Jr. Member
  • Posts: 88
Re: < or = $700 Linear Power Supply Comparisons
« Reply #30 on: 25 Feb 2018, 11:53 pm »
my bad... retailer.. buying same unit from different seller

maty

Re: < or = $700 Linear Power Supply Comparisons
« Reply #31 on: 3 Mar 2018, 10:04 am »
More about iFi iPower  :nono:

Measurements of Sonore microRendu Streamer

https://audiosciencereview.com/forum/index.php?threads/measurements-of-sonore-microrendu-streamer.577/

[IMG] https://audiosciencereview.com/forum/index.php?attachments/usb-versus-microrendu-with-ifi-power-supply-png.2153/

[IMG] https://audiosciencereview.com/forum/index.php?attachments/microrendu-with-lab-supply-png.2154/

Quote
Summary

The combination of Sonore microRendu and ifi iPower is not good news. Performance is significantly degraded by injection of AC mains input of 60 Hz and its harmonics.

If you are going to use microRendu, then you should opt for a power supply like the SBOOSTER that has measured system performance that demonstrates its performance in this system. Once there, this device is useful from functionality point of view in allowing the DAC to sit remotely on a network. From audio performance point of view, the measurements do not show any improvements.
« Last Edit: 5 Mar 2018, 10:01 am by maty »

maty

Re: < or = $700 Linear Power Supply Comparisons
« Reply #32 on: 3 Mar 2018, 03:52 pm »
Audio Ramblings - The Auralic Aries and SBooster Linear Power Supply

https://positive-feedback.com/audio-discourse/audio-ramblings-the-auralic-aries-and-sbooster-linear-power-supply/




https://www.sbooster.com/botw-pp-eco-15v-16v/?page=all

https://markgrant.co.uk/power-supplies/297-sbooster-15-16-volt-linear-power-supply.html

Quote
Product highlights:

    Power saving design.
    2 characteristics in 1 product.
    Power for high current demanding equipment.
    Precision for noise sensitive equipment.
    Two switch selectable output voltages; 15 volt and 16 volt.
    Accessory setting which provides extra voltage for the optional Sbooster Ultra.
    IEC 14 power inlet connector for high-end mains cables.
    High performance dual stage mains filter.
    Earth line choke.
    Over voltage protection. <- black varistor
    Custom made high efficient audio grade transformer.
    High quality polypropylene film capacitors.
    Improved low noise SBooster split current system.

The BOTW P&P ECO is available in 11 different output voltages.

http://hifipig.com/sbooster-best-of-two-worlds-power-precision-eco-botw-power-supplies/

http://www.standardcandle.org/2017/04/03/sbooster-botw-pp-eco-review/

fado

  • Jr. Member
  • Posts: 277
Re: < or = $700 Linear Power Supply Comparisons
« Reply #33 on: 4 Mar 2018, 06:20 am »
Maty, thank you for all the input.  The SBooster was well regarded by a member on a recent Audiogon forum.

maty

Re: < or = $700 Linear Power Supply Comparisons
« Reply #34 on: 4 Mar 2018, 08:20 am »
The problem, I think, is the high price in USA.

By the way, xrk971, some hours ago in Aksa Lender P-mos Hybrid Aleph (ALPHA) Amplifier thread:

http://www.diyaudio.com/forums/solid-state/318102-aksa-lender-mos-hybrid-aleph-alpha-amplifier-post5360011.html

Quote
Hi Hugh,

Yes, the Alpha 20 is now my main amp. 20 Watts would have been seen as wanting for more on some amps, but for some reason, it seems to be perfectly good here. Well I will have to do a revaluation once I get the 52w Big Boy going, big for now, I am able to put the other amps on the shelf and leave this one as primary. I think the combination of superior spatial imaging, clarity, resolution, and bass authority makes this amp a keeper. Seems to work quite well with conventional 400VA 18v toroidal trafo and CRC 33mF 0.235R 33mF shared with two channels then another 0.235R 33mF RC for each channel independently (F6 stereo PSU).

My SMPS seems to not be able to keep up without being stressed at the currents we are talking about here. I was running the DC step up at 29v to make 24v after the cap Mx and so that was 29/24x1.3ampsx2/0.9=3.4amps. Seems within 5amp rating but the smps supply seems to have more noise when pushed this hard. I might try again later with a good common mode choke filter. For now, just use the trafo and linear supply.

maty

Re: < or = $700 Linear Power Supply Comparisons
« Reply #35 on: 4 Mar 2018, 10:41 am »
I think is better idea to build/comission a PSU with very good regulation + common choke + Schaffner RF/EMI FN9244B 1A filter inlet + varistor + fuses + 1mm steel box.

With Sulzer regulator from ATL Hi-Fi

https://www.atlhifi.com/shop/bare-pcb/pcb-for-modified-sulzer-regulator-v-2/


Modified Sulzer Regulator – assembled and tested

https://www.atlhifi.com/shop/populated-pcb/modified-sulzer-regulator-assembled-and-tested/




or with the new and very good LT3402... from 5V or more.
http://www.linear.com/product/LT3042



Like this module:

0.8uV Ultralow noise DAC power supply regulator +-9/12/15V 1.5A*x2

http://www.diyinhk.com/shop/audio-kits/88-08uv-ultralow-noise-dac-power-supply-regulator-91215v-15ax2.html


Quote
Feature:

1) Linear Technology 0.8uV ultralow noise LT3042 regulator

2) +-9V/12V/15V 1.5A* output switchable with a jumper easily. Please notes 1.5A is the burst value, please read the bottom notes for output usage larger than 0.5A continuously.

3) Panasonic EEUFC low ESR 5600uF capacitor and the red WIMA film capacitor are sourced from authorized distributor Arrow Electronics directly (guarantee no fake product from China)

4) The PCB follows the official demo circuit for ultimate performance.

5) Compact size 60mm x 90mm


maty

Re: < or = $700 Linear Power Supply Comparisons
« Reply #37 on: 5 Mar 2018, 09:59 am »
Build a Linear Power Supply for the Mytek Brooklyn DAC.

https://www.computeraudiophile.com/forums/topic/28056-linear-power-supply-for-brooklyn-which-one-youve-ever-tried/?do=findComment&comment=712185


Quote
Overall measurements:

0-100kHz ripple: ~ 5µV rms
0-100kHz noise: -106dBV
0-20kHz ripple: 2,2µV
0-20kHz noise: -112dBV
50Hz ripple not measurable!

maty

Re: < or = $700 Linear Power Supply Comparisons
« Reply #38 on: 5 Mar 2018, 10:04 am »
P-8 Linear Power Supply

http://keces-audio-usa.com/products/P-8


$599.95, without measures or graphs.

maty

Re: < or = $700 Linear Power Supply Comparisons
« Reply #39 on: 5 Mar 2018, 10:10 am »
JS-2 Linear Power Supply

[Big IMG] https://cdn.shopify.com/s/files/1/0660/6121/products/JS-2_interior_master.JPG

Only $ 925.00, without measures or graphs.

The chinese Zerozone super-psu + mods/adds or a DIY with Sulzer or LT3402 are better choices to me.