ES9023 DAC PCB

[Ryssen]

At the second filtercap,is that at the ouput of the PSU?There it is 4.97v
Actually I just choose the first transformer I came across in the Elfa catalog..
And I had to slightly bend the pins of the transformer to make it fit on the pcb.

And the extra fuse holder...I forgott there was a fuse on the pcb but had drilled the hole on the back..so I thoght I just as well use it..

What happends if you twist the Spdif cable?

[syklab]

I had to use this transformer and it actually fit nicely. It had to ship from US to HK but orignated from China.

FS16-150 - TRIAD MAGNETICS - BOBBINS TRANSFORMER | e絡盟 Hong Kong

[jean-paul]

Hi Åke, I mean at the second 1000 uF cap.

[pchw]

Originally Posted by jean-paul

Hi Fred, can you explain why you use 2 fuses in series ?

Double safety , no, just laziness

Nice build, how does the power supply perform ?

The PS performs very well, I had my second Dac board built last weekend.
I am able to compare various PS that I have built for this Dac side by side.
To my ear and my gears, this PS is better than all the souped up 7805/LM317 types of PS and is a touch below the Salas BiB 1.1. But considering the simplicity of packaging the PS and the Dac in one small chassis with such quality, it will be difficult to beat.

[jean-paul]

Thanks for the comment. I am glad you like it. LM723 is a good chip, better than most LDO regs. I knew some would laugh at it but quality was the parameter we choose it for. It seems we did the right thing

[Ryssen]

Originally Posted by jean-paul

Hi Åke, I mean at the second 1000 uF cap.

It is 15v
Q1 gets "fingertip hot"

[jean-paul]

So you could have used a 2 x 7.5 V transformer. As long as the LM723 gets 9.5 V minimum it wil be OK. Mount a small heatsink or a piece of L shaped aluminium on Q1 just in case.

[jgwtriode]

Is it still possible to get the board and instruction to build this dac?

Thanks

jgwtriode

[enjoybiking]

Originally Posted by jgwtriode

Is it still possible to get the board and instruction to build this dac?

Thanks

jgwtriode

Or will you post the Eagle CAD project files? THAT would be slick!! Then we could MOD it a bit... "it IS DIY"