Has anyone tried using a single 1794 with it's balanced outputs connected to a Pass I/V stage?
-David
-David
Has anyone made any progress on designing a balanced output DAC?
Just curious where the project stands.
-David
Just curious where the project stands.
-David
Might take a look at:
http://www.diyaudio.com/forums/show...8700#post868700
Russ and Twisted Pear have already done some great designs and this is looking good.
http://www.diyaudio.com/forums/show...8700#post868700
Russ and Twisted Pear have already done some great designs and this is looking good.
http://www.diyaudio.com/forums/showthread.php?postid=868700#post868700
Cut and paste never seems to work right.
Cut and paste never seems to work right.
Instead of waiting for someone else to design a differential 1704 DAC for you, why don’t you do it yourself? Isn’t that what diyAudio is all about?
Here is a layout idea for four 1704 DACs arranged as differential pairs using through-hole components. It is compact and symmetrical. I did it in about an hour using the free software from ExpressPCB. Four boards with silkscreen and solder mask would cost $179. Three boards without the frills would be $51. Because ExpressPCB doesn’t do bottom side silkscreen, the component outlines are all on the top surface and overlap each other. It’s a bit of a puzzle to figure out which parts go on the top, which go on the bottom, and in what assembly order to make everything go together.
Here is a layout idea for four 1704 DACs arranged as differential pairs using through-hole components. It is compact and symmetrical. I did it in about an hour using the free software from ExpressPCB. Four boards with silkscreen and solder mask would cost $179. Three boards without the frills would be $51. Because ExpressPCB doesn’t do bottom side silkscreen, the component outlines are all on the top surface and overlap each other. It’s a bit of a puzzle to figure out which parts go on the top, which go on the bottom, and in what assembly order to make everything go together.
Attachments
So one answer to this old, but certainly very interesting thread would be the HB-DAC1704 from Borbely Audio?
in which direction did all those design ideas go?
Any update?
Greetz Ava
in which direction did all those design ideas go?
Any update?
Greetz Ava
I don't get it. What's the benefit of two PCM1704 per channel? Why not just take one output and convert to balanced? I would think this is better that two converters that are not matched.
You don't get any more bits of resolution. Maybe 3dB of SNR. What am I missing?
jh
I am looking for a DAC like this - go to www.hagtech.com/pdf/hagdac.pdf
but additional with a NOS operation mode - go to www.pavouk.org/hw/modulardac/en_pcm1704.html
so as a second solution for I/U converting as to find by Nelson Pass' "D1" DAC.
Who know such a kit?
Which switching solution is the best for selecting between the various modes?
Thank you for your informations.
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A8
I bought a Denon dvd-5000 that didn't read DVD/CDs but will act as a dac. Cost, $35 or about 120kr. Layout is ok and 4 PCM1704 (mid quality) chips, single ended. Cost/performance hard to beat. These units had poor reliability in the transport. Just a thought.
I bought a Denon dvd-5000 that didn't read DVD/CDs but will act as a dac. Cost, $35 or about 120kr. Layout is ok and 4 PCM1704 (mid quality) chips, single ended. Cost/performance hard to beat. These units had poor reliability in the transport. Just a thought.
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