|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
79.8.30.141
In Reply to: RE: Linear PSU again: help needed posted by cics on December 12, 2010 at 00:09:52
IMHO, a cleaner solution for any ATX case would be:
- an external box with the 3 PSUs
- 3 ext. cables
- a metal plate with connectors, for PC back in place of ATX PS
- 3 internal cables for P24, P4 and Peripherals.
This is how I am building it!
Follow Ups:
Good Bibo!
"3 internal cables for P24, P4 and Peripherals." - I would make so: first cable (6 wires) for P24 (+3.3, +5, +12, 5VSB, ground - separate low-power psu for 5VSB and pwr_ok, delay board for pwr_ok is in the PC case, for example near the P24 socket), second cable (same, 6 wires) for P4 (+12, ground) and Peripherals (+3.3, +12, ground) and third cable for Juli/Lynx AES16/lynx Two (22) w/o analog (+5, ground).
Connectors are Neutrik.
http://cmp2-mihaylov.narod.ru/
Edits: 12/12/10 12/12/10
Mihaylov,
I am not sure I can agree with your suggestion.
I do not have a Juli@ and my Lynx card would require triple voltage (+5V, +12V, -12V), so I am not going to power for it separetly but through the board.
My idea was to have:
Cable no.3 - (+5V, +12V, ground) for HD, USB, int. LCD + extra device
Cable no.2 - (+12V, ground) for CPU/P4
Cable no.1 - (+3.3V, +5V, +12V, -12V, 5VSB, ground) for mainboard/P24
You suggest to have "separate low-power psu for 5VSB and pwr_ok, delay board for pwr_ok is in the PC case, for example near the P24 socket", any particular reason?
I was thinking to keep everything together, inside the power box.
You also suggest Neutrik connectors. I think I am going to use different power connectors with screw rings which are often used for double frame high-end audio geare.
All transformers are custom made.
OK. But I think it would be acceptable to unite cables no.3 and no.2.
Delay circuit for pwr_ok works from system board's PS_ON input signal and so it's useful to place it near P24 socket.
http://cmp2-mihaylov.narod.ru/
Mihaylov,
You suggested "separate low-power psu for 5VSB and pwr_ok".
Do you mean, "separate from your main +5V linear supply?
Did you mention this in your PDF design plan?
Could you please tell why and what kind of low-power psu?
I would need your info to implement it.
Thanks
-Do you mean, "separate from your main +5V linear supply?- Yes.
-Did you mention this in your PDF design plan?- No. It's a new option offered Greg and improving a sound.
I use such linear psu for 5VSB and pwr_ok in my alternative cMP2's linear PSU (see Photos from my site).
http://cmp2-mihaylov.narod.ru/
Using your delay circuit does Pin 16 PS_ON (Green) get connected on P24?
Thanks
Yes, certainly. Pin 1 DD1 is connected to pin 16 socket P24 of the system board. The system board is started by pressing the button on Zalman's front panel.
http://cmp2-mihaylov.narod.ru/
Thanks.
I wanted to be sure becaus in your PDF design plan, on the last page, Pin 16 is set to No Connection.
"...in your PDF design plan, on the last page, Pin 16 is set to No Connection." - It's correct because delay circuit isn't use in initial variant of linear PSU for GA-G31M-ES2L system board.
http://cmp2-mihaylov.narod.ru/
Thanks a lot.
I will upgrade "my" plan :)
When you say ""separate low-power psu for 5VSB and pwr_ok", was this in your PDF design plan?
What kind of low-power psu?
Thanks
Hi BiBo01,
I’m considering such solution too.
If you have finished them, could you please post some pics here on the forum or on Picasa for some inspiration too others who also consider a separate enclosure for there PSU’s?
Mark
fully AOB optimized cMP2 PC -> ESI Juli@ -> Van den Hul Optocoupler MkII-> Lavry Black DA10 -> XLR Mogami Gold -> Klein & Hummel O300
Of course I will as soon as it is finished.
No need to ask :)
This is a community, isn't it?!
Your suggested design is what I had in mind. Its also very important to have 2 AC inlets (one for P24 and the other for P4 & peripherals).
How do we get this manufactured?
cics,
I was actually planning to have three power cords, but to make a simpler design I am going to have only two.
dear forum,
getting a linear power supply into manufacture is not the problem...
there are numerous specialist companies here in germany doing all sorts of customized PSUs.
-even in small numbers.
the big question is how many confirmed orders we can get together.
I would be happy to forward a request on a one-box solution, but we seriously need to fix a specific design on such a project.
if the experts can formulate and write the "receipt", and we can do an estimate on the numbers, I shall be very happy to request a price from different manufacturers.
kind regards
cMP2 Computer (XP minlogon) Intel E7400 cPlay039>Allocator>Lynx Two B. /192kHz throughout. 2x AcousticReality Ref. 202 & 2x AcousticReality Ref. 601´s ICEpower. Magnepan MG3.3R beechwood frames & custom stands. Miller chokes on Ribbons.
Hi Playmate,
That would be great idea.
But do we know what too order? What is needed? I think it is a pitfall when telling a PSU manufacturer how too put together a PSU in terms of: how to build it and what too put in.
May be is it better too only identify what parameters accurately describe the quality of the power that is needed for an cMP setup.
I came too this approach after reading this article from mr Rob Reeder (senior converter applications engineer at Analog Devices). He argues: “ Engineers commonly feel that a switching power supply can degrade the performance of an A/D converter, leading them to choose a low dropout (LDO) linear regulator over a switcher, but this percep¬tion isn’t entirely true.”
See: http://www.analog.com/static/imported-files/rarely_asked_questions/RAQ_tamingADC.pdf
So, do we absolutely need an all linear PSU? May be a mixed-mode PSU with Linear Final Regulation is also sufficient for a cMP setup. Who knows?
What specs should a PSU for a cMP setup have?
fully AOB optimized cMP2 PC -> ESI Juli@ -> Van den Hul Optocoupler MkII-> Lavry Black DA10 -> XLR Mogami Gold -> Klein & Hummel O300
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: