Author Topic: Soekris dam1021 rev 3 (2%) R2R ladder DAC  (Read 3081 times)

Offline scrarfussi

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Re: Soekris dam1021 rev 3 (2%) R2R ladder DAC
« Reply #30 on: September 04, 2016, 10:37:38 AM »
very pretty
Are you still using the batteries as powersupply ?
suum cuique pulchrum est


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Online gavinbirss

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Re: Soekris dam1021 rev 3 (2%) R2R ladder DAC
« Reply #31 on: September 04, 2016, 02:09:18 PM »
Not batteries but +9/-9V TPS7A4700 regulated power.
50W 9-0-9 transformer
TPS7A4700 regulator for 3.3V

Online gavinbirss

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Re: Soekris dam1021 rev 3 (2%) R2R ladder DAC
« Reply #32 on: January 22, 2017, 01:56:47 PM »
Set Rev2 board (single) to mixed filters (bank F5) and volume to +3.

Setting volume to +3 or more can cause audible distortion on signal (clipping).

Values are only printed on next powerup.

« Last Edit: January 22, 2017, 02:25:56 PM by gavinbirss »

Offline juventino

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Re: Soekris dam1021 rev 3 (2%) R2R ladder DAC
« Reply #33 on: June 18, 2017, 05:44:53 PM »
Did this go any further than above? Or was there a different thread opened?
Time to get back to when I enjoyed listening......no more upgrading, more of a headache than a pleasure

Online gavinbirss

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Re: Soekris dam1021 rev 3 (2%) R2R ladder DAC
« Reply #34 on: June 18, 2017, 06:51:15 PM »
Still plankie.

Low noise powersupply to each board and to USB and 3.3V line.

Schaffer filter to transformers.

Have nice control board but more suitable for a single board.

See: http://www.diyaudio.com/forums/vendors-bazaar/307452-az-oled-setup-kits-soekris-dam1021-1121-control.html


Offline juventino

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Re: Soekris dam1021 rev 3 (2%) R2R ladder DAC
« Reply #35 on: June 18, 2017, 09:14:33 PM »
So you got the dual board working 👍

How does it sound and what have you compared it to for reference?

Thanks
Time to get back to when I enjoyed listening......no more upgrading, more of a headache than a pleasure

Online gavinbirss

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Re: Soekris dam1021 rev 3 (2%) R2R ladder DAC
« Reply #36 on: June 19, 2017, 09:48:45 AM »
So you got the dual board working 👍

How does it sound and what have you compared it to for reference?

Thanks

Purists will prefer the RAW output as it is free of "opamps", no I/V is needed, although 2 boards in dual-mono is required for balanced RAW output.

RAW output is closer to the "ideal" 525-600 ohm output impedance although slightly lower in amplitude compared to the buffered/opamp output.

There are 4 built-in filter banks and minimal is default, I have switched to "mixed"

RJ, Scarfussi have auditioned the single board. The single board was also at one the DIY shootouts.