New PCM1794A Kit – Balanced Mode Update – Good to Fantastic Sound! - Page 13 - diyAudio
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Old 12th February 2012, 11:42 AM   #121
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well, if you want big improvement in SQ not just different taste of sound I strongly advise to replace 7805 regulator. I just plugged DIY discrete one and its improvement in all areas.
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Old 12th February 2012, 12:02 PM   #122
TC Goh is offline TC Goh  Hong Kong
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Wow. What did you replace it with? Any chance of some photos? I just dropped in a L4941 sometime ago and that made a difference too. Sounds like you are having a much higher gain.

Best wishes

TC

Quote:
Originally Posted by zibra View Post
well, if you want big improvement in SQ not just different taste of sound I strongly advise to replace 7805 regulator. I just plugged DIY discrete one and its improvement in all areas.
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Old 12th February 2012, 12:14 PM   #123
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Generally its complete discrete power supply made by friend of mine, without any resistors etc. Im not that good in details. For now I just plugged it straight into place of 7805 regulator. It has 2 stages of stabilizing. Its big catharsis for sound

Click the image to open in full size.
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Old 12th February 2012, 11:49 PM   #124
TC Goh is offline TC Goh  Hong Kong
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Hi Zabra

Perhaps it is my browser but you picture doesn't load.

Best wishes

TC


Quote:
Originally Posted by zibra View Post
Generally its complete discrete power supply made by friend of mine, without any resistors etc. Im not that good in details. For now I just plugged it straight into place of 7805 regulator. It has 2 stages of stabilizing. Its big catharsis for sound

Click the image to open in full size.
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Old 13th February 2012, 01:04 AM   #125
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Imageshack wants it like this:
Click the image to open in full size.
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Old 13th February 2012, 08:36 PM   #126
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I guess Salas's Shunt Reg would fit perfectly there!

Anyone tried?

Do
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Old 13th February 2012, 10:04 PM   #127
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Dont think anyone tried dicrete regulator here yet but improvement is crucial to sound - not just matter of taste and preference. I also tried pluggin that power supply into +20V but it sounds worse after short comparision (will try tomorrow also). If you are hardcore then discrete regulator in that place is a must and I dont focus on very subtle changes Difference is huge.
In few days Ill be also testing DIY asynchronic USB-I2S module on TAS1020B as Im using PC for music (EMU1212) so more news toshare in future. Also will try Caddocks in I/V conversion and some Amtrans and others for filtering. So still a lot for testing but that swap is already biggest improvement in SQ easily to hear even for a beginner
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Old 14th February 2012, 10:51 AM   #128
UMarcus is offline UMarcus  Germany
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Hi All,
i had build a pre amp dac with the boards from spencer, it sounds fantastic. I would like to express my sincerest thanks to spencer and community to provide and support such great dac.

Attached some photos of my DIY stuff and dac boards.

btw.. i upgrade the dac with HFA rectifier diods and bellson LDO..

Regards
Marcus
Attached Images
File Type: jpg P1090421_50.jpg (844.0 KB, 160 views)
File Type: jpg P1090420_50.jpg (832.8 KB, 167 views)
File Type: jpg P1090423_50.jpg (745.2 KB, 162 views)
File Type: jpg P1090419_50.jpg (856.3 KB, 160 views)
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Old 15th February 2012, 12:55 AM   #129
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Quote:
Originally Posted by UMarcus View Post
Hi All,
i had build a pre amp dac with the boards from spencer, it sounds fantastic. I would like to express my sincerest thanks to spencer and community to provide and support such great dac.

Attached some photos of my DIY stuff and dac boards.

btw.. i upgrade the dac with HFA rectifier diods and bellson LDO..

Regards
Marcus
Hi Marcus,

What line stage are you using for the DAC? It is tubes but cannot read on the PCB...

Thanks
Do
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DACs : TPA Buffalo II + OPC's NTD1 I/V | TPA OPUS + IVY III Speakers : Jim Holtz Statements | Astasia SD | Tubasson Mark 2
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Old 15th February 2012, 01:14 AM   #130
qusp is offline qusp  Australia
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Quote:
Originally Posted by zibra View Post
Dont think anyone tried dicrete regulator here yet but improvement is crucial to sound - not just matter of taste and preference. I also tried pluggin that power supply into +20V but it sounds worse after short comparision (will try tomorrow also). If you are hardcore then discrete regulator in that place is a must and I dont focus on very subtle changes Difference is huge.
In few days Ill be also testing DIY asynchronic USB-I2S module on TAS1020B as Im using PC for music (EMU1212) so more news toshare in future. Also will try Caddocks in I/V conversion and some Amtrans and others for filtering. So still a lot for testing but that swap is already biggest improvement in SQ easily to hear even for a beginner
using an async usb convertor for audio production may not be the best idea unless you can set it somehow as the master clock for everything; as it adds a small (actually by production standards maybe not that small) and probably unknown latency, if you have to sync with other hardware or software mixers, ADC inputs and instruments; it doesnt work that well
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