I am planing to use this outputstage http://www.fortunecity.com/rivendell/xentar/1179/theory/vasfda/vasfda.html
on my PCM1704 DAC is it okay to use this filter?
It says it´s okay to use 6SN7 whitout changing the cathode resistor, What about 6SL7, I think it´s better than 6SN7.
Anyone tried this.Or have an other schema?
on my PCM1704 DAC is it okay to use this filter?
It says it´s okay to use 6SN7 whitout changing the cathode resistor, What about 6SL7, I think it´s better than 6SN7.
Anyone tried this.Or have an other schema?
I am refering to the first circuit (SRPP).
Could You please tell us what Dac are you using this output stage with,and how does it compare soniclly to op-amp stages and other discrete designs?
Bartek
The DAC.
Hi Bartek,
My DAC chip is a TDA1541. The output goes directly to a 'pi' filter and is then amplified by the tube.
In the same machine I can use an opamp also. I used the OPA2134 and later the AD826 . The 826 is much better. The opamps are very good but there is a difference in midrange sounds with the tube. The tube is smoother and easier on the ear.
The circuit is somewhere around. Search the forum and you should find it. I posted it several months ago. I guess you can do a TDA1541 search.
I left out the 'deem' circuit .
This set up sounds better than a stock CD-17 Mk II !
Cheers,
Ashok.
Hi Bartek,
My DAC chip is a TDA1541. The output goes directly to a 'pi' filter and is then amplified by the tube.
In the same machine I can use an opamp also. I used the OPA2134 and later the AD826 . The 826 is much better. The opamps are very good but there is a difference in midrange sounds with the tube. The tube is smoother and easier on the ear.
The circuit is somewhere around. Search the forum and you should find it. I posted it several months ago. I guess you can do a TDA1541 search.
I left out the 'deem' circuit .
This set up sounds better than a stock CD-17 Mk II !
Cheers,
Ashok.
Thanks,
I'm modifying old Marantz player now (CDM4/SAA7220/SAA7210/TDA1541A).I'm building Thoresten's OPA660 I-V output stage now,but would like to try tube output ,too.
How do you leave the "deem"?
I've heard about this mod. but couldn't find any posts how to do it.
Bartek
I'm modifying old Marantz player now (CDM4/SAA7220/SAA7210/TDA1541A).I'm building Thoresten's OPA660 I-V output stage now,but would like to try tube output ,too.
How do you leave the "deem"?
I've heard about this mod. but couldn't find any posts how to do it.
Bartek
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