A NOS 192/24 DAC with the PCM1794 (and WaveIO USB input) - Page 14 - diyAudio
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Old 13th January 2013, 02:12 PM   #131
clivem is offline clivem  United Kingdom
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I have attached my power supply schematic, which might make more sense of the picture of a pile of parts and wires. (Apologies for the hand-drawn low quality).

The "black-box" regs used for the 12V and 5V digital sections are these pre-built VERY LOW NOISE <40μV Adjustable Voltage Regulator Board, out 2.5 - 19.5VDC / 3A boards purchased from eBay, based on LT1764. PDF schematic: A-270.

The HT regulator for tube B+ is the Tom Christiansen 21st Century Maida Regulator. (R3=36R. R9=100K. All other components are as per his schematic.)

The reg for the 6C45 tube heater supplies is a Tent Labs Tube Heater Supply, biased up to ~50V from the B+.
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Old 18th January 2013, 02:11 PM   #132
clivem is offline clivem  United Kingdom
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Quote:
Originally Posted by dddac View Post
For the 384kHz, the PCM1794 most likely will be able to do this, but I have not tested this.
Tested! I've got my on-the-fly sox upsampling set to 8x with the Amanero, for 44.1k source files.

Code:
Amanero Technologies Combo384 Amanero at usb-0000:00:1a.7-1, high speed : USB Au
dio

Playback:
  Status: Running
    Interface = 2
    Altset = 1
    Packet Size = 1024
    Momentary freq = 352750 Hz (0x2c.1800)
    Feedback Format = 8.16
    Packet Size = 0
    Momentary freq = 352800 Hz (0x2c.199a)
  Interface 2
    Altset 1
    Format: S32_LE
    Channels: 2
    Endpoint: 5 OUT (ASYNC)
    Rates: 44100, 48000, 88200, 96000, 176400, 192000, 352800, 384000
    Data packet interval: 125 us
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Old 17th February 2013, 10:05 AM   #133
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Just ordered mine. I'm very curious to listen to this jobbie.
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Old 17th February 2013, 01:14 PM   #134
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I did build two already. One with one deck, and the other with four decks. And now I will make some serious listeningtests. Also with the outputcaps, auricaps vs mundorf silvergoldoil.
It is in mho the best dac I heard. Just sold a totally tweaked v-dac......that little one had space, pinpoint and so on...(and even was better then an Altmann dac) ....but the dddac .... Is another story......it is the beautiful girl standing before you in the most beautiful lingerie........but then for the ears. The secret in audioworld......sssshhhhhht.

Last edited by Jan Deckers; 17th February 2013 at 01:17 PM.
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Old 17th February 2013, 01:23 PM   #135
dddac is offline dddac  Germany
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Thanks Jan, great feedback and look forward to the listening tests.
May be good to mention, that you also use the 5V and 12V power supplies to make it all complete...
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Old 17th February 2013, 05:24 PM   #136
IanS1 is offline IanS1  United Kingdom
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Agree with you Jan, the DDDAC is indeed very special. I've heard and owned some very expensive so called highend DAC's but I've never heard any of them do what the DDDAC does.

I built mine first with one board and now with 4 boards. I'm also using Doedes PSU's to power everything.
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Old 17th February 2013, 07:05 PM   #137
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As Doede also mentioned, I am using his psu, for 12V and 5V. Before I only used a tentlabs psu for the 12V (als o very good) and for the usb Luckit I used the psu of the computer. I have to say there was a big differance between the computers usb psu or the version with the dddac-psu. The last one was obviously the winner. As for the 12V psu, we did some measuring at the owner of Audio-Creative and there the Tentlabs psu did some great work.
For now, I am going to listen to the DDDAC with 1 deck and another with 4 decks, both with the complete DDDAC-psu (12v and 5v).

Music source is a macbook air (late 2011) and I am using Audirvana (after testing the others too).
For real tests I use either Logic 9.2 or Protools 10. Not really for hifi listening, but very accurate. Until now, nothing beats Protools or Logic, but Audirvana Plus came very, very close!
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Old 17th February 2013, 07:10 PM   #138
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Ordered the 5 v psu as well now. Since I already have an excellent 12v psu.

Verstuurd van mijn GT-N7000 met Tapatalk
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Old 18th February 2013, 12:18 PM   #139
IanS1 is offline IanS1  United Kingdom
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Quote:
Originally Posted by Bas Horneman View Post
Ordered the 5 v psu as well now. Since I already have an excellent 12v psu.

As CliveM will confirm , don't forget to change the jumper on the WAVE I/O to enable the external supply.
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Old 18th February 2013, 12:19 PM   #140
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Quote:
As CliveM will confirm , don't forget to change the jumper on the WAVE I/O to enable the external supply.
Yes. Thanks. I read that part. Glad to be able to learn from the "mistakes" of others.
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