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Old 17th August 2010, 01:38 AM   #4451
Salas is online now Salas  Greece
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Close all lids, take the graph and then listen. You will probably find it more open and detailed now.
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Old 17th August 2010, 01:50 AM   #4452
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I need to finish my measurement pc!!! Still not bad though, even with low batteries.

I will give a listen as soon as the kids are done watching a movie.

Here is the graph with the lids on
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Old 17th August 2010, 01:56 AM   #4453
Salas is online now Salas  Greece
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The THD is great. This is no global feedback single ended, remember.

In your 3 color post, although the THD on the green curve was wrong due to the cuckoo 2nd stage fets you changed, you could display lower noise floor non the less. How that happened? Pressed some different buttons on the software?
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Old 17th August 2010, 02:02 AM   #4454
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I feel after the bit learned today, that the usb sound card, pmillet interface and laptop are not the right combination. I can wave my hand around the computer and things change. I will spend some time on the pc.
Only prob there is it runs win7, not too happy with it yet. I did put a pretty decent PS in it and I really like the Maudio card.
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Old 17th August 2010, 02:08 AM   #4455
Salas is online now Salas  Greece
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I use an old IBM laptop and an EMU tracker. No problems, steady.
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Old 17th August 2010, 03:13 AM   #4456
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Finally got the chance to listen. A significant improvement. Details much imprved as well as soundstage. It is very BLACK sounding. In other words, only the music, no noise in between. I like it alot. Even the WIMA caps sound good;-)

Before it sounded good but seemed compressed. Seperation of instruments was lacking. I thought most of it was the caps.



I was totally engaged listening to Amanda McBroom's Wizard of Oz. Sheffield recording. Incredible!
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Last edited by SGregory; 17th August 2010 at 03:15 AM.
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Old 17th August 2010, 08:59 AM   #4457
AndrewT is offline AndrewT  Scotland
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SG,
thank you for taking us with you on this build and troubleshoot journey.
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Old 17th August 2010, 09:47 AM   #4458
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Quote:
Originally Posted by Salas View Post
You are welcome. The box is for hum, I don't know if it helps further, but the other ''warm'' thing you mention I think is mainly the R-Core.

Any picture of it finished and at work? 500mA?
Arrived yesterday Cardas hook-up wire & Cardas headshells 33ga with premium PCC Ag/Rh clips

Click the image to open in full size.

When I will change I will post some pictures.
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Old 17th August 2010, 10:12 AM   #4459
Salas is online now Salas  Greece
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Quote:
Originally Posted by SGregory View Post
Finally got the chance to listen. A significant improvement. Details much imprved as well as soundstage. It is very BLACK sounding. In other words, only the music, no noise in between. I like it alot. Even the WIMA caps sound good;-)

Before it sounded good but seemed compressed. Seperation of instruments was lacking. I thought most of it was the caps.



I was totally engaged listening to Amanda McBroom's Wizard of Oz. Sheffield recording. Incredible!
Cool. The interstage capacitors are very obvious in this design, although it is great as it is, it will be very easy to appreciate the Teflon ones you plan to substitute the Wima with. We will wait you evaluate with your final parts, and to see final photos of it on the rack, the 103R on the Magnepan etc.
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Old 17th August 2010, 12:13 PM   #4460
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I will update when the stuff arrives and I install it. I will also have the R-core installed by then. In the meantime, I will be starting the new TT and rebuilding my preamp again. Thanks for everyone's support, particularly Salas's
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