bobopich

Hi Alex, Yes it is my mistake i should have written accuracy 0.0001V not % , i.e. 0.1mV but it is still within extremely good specs. I can request for a block diagram of the PSU if you're interested but i cannot take the schematics due to the reason i explained above.

The PSU has direct voltage tracking of the rails which controlls the linear stabilizers themself. No digital or any other kind of "noise" could affect the clear voltage of the PSU.

I partly agree with you but what about a well-designed linear regulated PSU will a well-designed SMPS still be that good. The PSU in my PC has stable voltages that has 0.0001% shift no matter of the load up to the allowed current cut off.

I've put the fan just in case. These were older pictures without the FAN control i have designed. This is the new picture of the PC with the fan control : http://bobopich.snimka.bg/radio-amateur/htpc.671317.27072879.big The temperature of the CPU is around 45C when in idle or listening to music and the fan is not working at that point. It switches on only when the temp gets to 60C at 5V with it's own regulators and at 70C at 12V and goes down with hysteresis . I can even adjust the exact temperatures with the trimmer. So basically i have two speeds for the fan and when listening to music it is not working at all. Sometimes it switches on when watching a movie or doing some intensive CPU job. I am also thinking of supplying the USB/SPDIF converter with separate 5V from the linear rail to check if there will be any audiable difference but accoring to my measurments the MB is supplyiing the same 5V to the USB port that comes from the linear PSU so they are basicly clean. But i will make the test anyway.

Actually it is just a custom box it was not designed especially for PC and i wanted to put all toghether in order to save space. As the PSU generates a lot of heat it is not a bad idea to be put in separate box.

Sorry, I didn't mean to make advertise if my post is really considered like one. The PSU will most probably be sold only in Bulgaria and it is not actually developed by me but by a friend of mine. I was the lucky guy to have the test board. Unfortunatelly this is why i don't have the schematics. In general the PSU has two rails 12V and 5+3V powered by torodial transformer 230V/ 11 + 19V AC, two rectifiers and filter caps. It can supply up to 5-6A per rail but mine is with a cut off protection at 3A as the PC consumes very low power. The measurements of the rail consuptions are : Voltage Music (A) Movie(A) Max (A) Stand by (A) +12VDC 0,460 1,150 1,420 +5VDC 1,050 1,580 2,120 +3.3VDC 0,450 0,440 0,420 +5VDC SB 0,450 0,380 0,500 0,175 -12V - not used The motherboard is ASUS E45M1-I Delux with 2x2GB Kingston DDR3 and a HDD. I am using a USB DAC for the audio and also connected a receiver with HDMI for the video. The aim of my post was to exchange experience with someone that is also runing a linear powered PC. Why do you think the PSU should be four way ? I think it has enough power for a mini ITX based PC.

Hi, I want to introduce to you my project of audiophile PC powered by true linear psu. The PSU is the most important part of the project and was designed and build in Bulgaria it is the prototype on test board implemented into my PC but it will soon be offered as a product for sale. The result is astonishing and the sound and picture quality is by far superior compared to the same PC powered by switching mode PSU, take a look at the pics and later i will post more details and info. http://bobopich.snimka.bg/radio-amateur/htpc.671317.26962420.big