Now that's a good question
It's an ASUS Xonar Essence ST. The card is very capable in its stock form, however I've added on my own expansion board that feeds the I2S lines out via LVDS. This goes into a galvanically isolated separate enclosure that contains an ESS9018 working as a DAC. This gives better measured performance than the PCM1792 on board the ASUS, especially with 192kHz stuff. Still the stock card is more than adequate all on its own.
As far as I know people have had good success with some of the RME and E-MU stuff too.
Stereophile has measured the ASUS stuff here.
ASUS Xonar Essence ST/STX soundcards Measurements | Stereophile.com
Thanks Jason. When I have time I will create a txt file with the most common devices I use. that should make it easier. I am having a lot of fun learning Ltspice. I have a long way to go. I really need to learn how to use a layout program so I don't have to bug all you guys for help in that area. I have a laser printer coming this month so I will start etching again so I won't need someone to make gerbers. I would really love to learn to make gerbers. Board house boards are as cheap or cheaper than bare foil boards these days.
Thanks again, Terry
Thanks again, Terry
Thanks for reply.Now that's a good question
It's an ASUS Xonar Essence ST. The card is very capable in its stock form, however I've added on my own expansion board that feeds the I2S lines out via LVDS. This goes into a galvanically isolated separate enclosure that contains an ESS9018 working as a DAC. This gives better measured performance than the PCM1792 on board the ASUS, especially with 192kHz stuff. Still the stock card is more than adequate all on its own.
As far as I know people have had good success with some of the RME and E-MU stuff too.
Stereophile has measured the ASUS stuff here.
ASUS Xonar Essence ST/STX soundcards Measurements | Stereophile.com
It's about 180e....expensive toy
For you , Terry ... I attached my latest .ASC for the "wolverine".
It is component compatible with the 1.3 layout , it might have a few component "tweaks". use any (semi)models in the circuit , it works
with just about anything (keens models - oem models - cordell .. etc.).
To answer 5th's question ... I test at 8 and 4 R , 1V input - (1/2 power).
The wolverine does about 5ppm 8R and 8 ppm 4R.
Wolverine is a "reverse" Badger , it's main improvement is saturation recovery.
PS - after Terry's Badger clipping - this had to be !
I also test PSRR with 1V ripple (out of phase and in phase) @ a full 1hz-1mhz
sweep. Stability is assured with 75+ phase margin @ unity gain and at least
>-12db at 180 degrees (past UG).
And last ... I'll get a "ringing" square wave (or overshoot) and increase
compensation (overcompensate) by 20%. This will accommodate more
devices.
All resistors , capacitors and semi's are derated from 20% to 100%. These
circuits should last 20 years with just re-caps needed.
This might be my last post for (over)1 month ... all packed and ready to travel
1000+ miles
Tennessee is really home.. (even if I am a yankee) new yorker's can have NY!
OS
Thanks OS,
I switched out the devices I don't have and the attempted to add them to the schematic. Not sure if that worked since they are in my library. I couldn't get this thing to clip. I raised the voltage to +-92V because I plan to run one at that rail. Even with 2.5V input I see 135V p-p and no clip. Probably doing something wrong. Interesting.
I switched out the devices I don't have and the attempted to add them to the schematic. Not sure if that worked since they are in my library. I couldn't get this thing to clip. I raised the voltage to +-92V because I plan to run one at that rail. Even with 2.5V input I see 135V p-p and no clip. Probably doing something wrong. Interesting.
It is component compatible with the 1.3 layoutFor you , Terry ... I attached my latest .ASC for the "wolverine".
It is component compatible with the 1.3 layout , it might have a few component "tweaks". use any (semi)models in the circuit , it works
with just about anything (keens models - oem models - cordell .. etc.).
To answer 5th's question ... I test at 8 and 4 R , 1V input - (1/2 power).
The wolverine does about 5ppm 8R and 8 ppm 4R.
Wolverine is a "reverse" Badger , it's main improvement is saturation recovery.
PS - after Terry's Badger clipping - this had to be !
I also test PSRR with 1V ripple (out of phase and in phase) @ a full 1hz-1mhz
sweep. Stability is assured with 75+ phase margin @ unity gain and at least
>-12db at 180 degrees (past UG).
And last ... I'll get a "ringing" square wave (or overshoot) and increase
compensation (overcompensate) by 20%. This will accommodate more
devices.
All resistors , capacitors and semi's are derated from 20% to 100%. These
circuits should last 20 years with just re-caps needed.
This might be my last post for (over)1 month ... all packed and ready to travel
1000+ miles
Tennessee is really home.. (even if I am a yankee) new yorker's can have NY!
OS
OS ,please post the exactly shematic and layout here, for this "wolverine",if possible.
Thimios.
Holy poop ... 92V rails !
Changing gain too much might compromise stability. R2/28 ---> 22k is OK for
nearly 40X gain.
I set most of my amps for 28X and they clip at 2V with (normal rails)
.Thimios/Terry .... Wolverine below - clips ... 170v p-p @ 92 rail ... 2.1v input
OS
Attachments
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Thanks OS.Holy poop ... 92V rails !
Changing gain too much might compromise stability. R2/28 ---> 22k is OK for
nearly 40X gain.
I set most of my amps for 28X and they clip at 2V with (normal rails)
Thimios/Terry .... Wolverine below - clips ... 170v p-p @ 92 rail ... 2.1v input
OS
Make SURE your 100V caps are REAL 100v caps !!
Or , it might be an "explosive experience"
.PS - be aware that standard BJT outputs have a lousy SOA at that voltage. Only those
Semelab "super BJT's" (the only ones that even have >2a @ 90+V) would fit the bill.
Example - MG6331 ... http://products.semelab-tt.com/pdf/bipolar/MG6331%20MG6331-R.pdf
has 2.5A @ DC and 4+A 100ms when running 90+V rails. ON/fairchilds are not even in the same realm.
OS
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