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My Linear PSU
My Linear PSU
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Old 24th March 2012, 08:25 PM   #1
ppastudio is offline ppastudio  Taiwan
diyAudio Member
Join Date: Aug 2008
Location: Kaohsiung
Default My Linear PSU

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Today's PC base source become more and more extensive range of applications
In order to allow the PC base compared to analog equipment with the same musical
A well-designed linear power has become the indispensable PC base's hardware equipment

This linear power supply chassis outer dimensions (including panels, floor mats, non-switch)
310mm deep x120mm wide x130mm high, net weight near 8 kg

The machine use 8mm-10mm aluminum alloy to achieve good electromagnetic shielding and shock control
No cooling fan and no shake to the chassis

At the same time a very solid chassis structure let the linear power of the number of units
Could be stacked on top of each other use
And will not detract from the performance of the sound

This linear power use 150VA (150W) of power transformer
Maximum available DC output of 120W or 10A
Such as the +12 V/10A, +19 V/6A, +5 V/10A single DC power supply output
Or +12 V/5A plus the +5 V/5A total 10A Dual DC power supply output

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A well-regulated power supply must be in large, small current output keep stable
To make the power supply in the high-current output is still able to work in very stable conditions
We need large output capacitor and the decoupling capacitors
Large-capacity capacitor could extend the life of the capacitor
That is, let the linear power under a long period of use
Will not let the sound quality deterioration
Basically large-capacity capacitor will not slow down the speed of sound
Incorrect circuit design is the main cause to slowdowns
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Old 25th March 2012, 04:02 AM   #2
wwenze is offline wwenze  Singapore
diyAudio Member
Join Date: Mar 2008
Nice, what do you use for regulation, or is it a trade secret?
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Old 25th March 2012, 05:00 AM   #3
ppastudio is offline ppastudio  Taiwan
diyAudio Member
Join Date: Aug 2008
Location: Kaohsiung
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Wrong transmission circuit and power supply circuit
Will be slow down the speed of sound in the case of large-capacity capacitor,
This is why I used scaffolding
Self-scaffolding can set the best state of the circuit
Will able to maintain the feedback network stay in low phase shift
Even large current thus the load end
This will let PSU keep very low distortion

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This PSU used XLR for DC output
So change different DC connectors
This PSU will fit all devices

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Have a good power supply circuit then you need good cord to maxium performance
Good wire will lower electronic interference and diffraction phenomena
So as to have good sound quality
This PSU used my self-developed Teflon silver plated wire for top sound quility
Meanwhile, in order to ensure that the output performance of the linear power
Power transformers are no longer buy from the market
Instead of using my self-winding transformer to control quility

Click the image to open in full size.

It has been confirmed through the measured
Mechanical vibration will gain electronic components's electrical harmonic shock
Thus resulting in the deterioration of the sound
Good power also need a solid chassis

One great PSU is actually a series of good details of the deal
With a good platform will reduce parts and circuit effect to the sound
The HighEnd audio depends on the know how in optimize to hardware & software
Not rely on parts or circuit
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