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Old 3rd May 2011, 05:20 PM   #2221
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Fully differentially is a network between the two phases.

Two networks to ground are not differentially.

Reinhard
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Old 3rd May 2011, 05:23 PM   #2222
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Sure. My FPS is fully diffential though as far as i can tell.
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Old 3rd May 2011, 06:00 PM   #2223
mzperx is offline mzperx  Hungary
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Quote:
Originally Posted by Joachim Gerhard View Post
How did you modify the Soundcard ?
OPA1612s are risponsible for the results. See the "before/after" details in excelsheet.

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Originally Posted by Joachim Gerhard View Post
Does the Hagerman implement the Neumann "pole" and is this the reason for the rising response towards 20kHz ?
I don't know. May be I left a related jumpers in wrong position. Or 100R output impedance of souncard instead of expected 50R could couse it?
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File Type: zip E-MU_1212m.zip (2.9 KB, 47 views)
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Old 3rd May 2011, 07:14 PM   #2224
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Quote:
Originally Posted by Joachim Gerhard View Post
have you ?
Pretty parts and construction, but as exciting as a Lexus.
Given the choice between 16 parallel parts or INA/AD797, i'd sooner pick a BB & AD Käfer Klirraudio (© Herr Löesch) balanced-ref for less than half the C27 cost.

Goes for all AccuPhase gear, long time ago i was rather impressed by the P102 balanced power amp till audit time. Deliberate market choice by the Yokohama brand, i assume, no thrills and no surprises.

(i loathe horns and anything fullrange high efficiency, had a ball at ETF , pretty S/N numbers for moving coil are not on the top of my list)

I do need a cell phone with prettier pixels.
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Last edited by jacco vermeulen; 3rd May 2011 at 07:17 PM.
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Old 4th May 2011, 01:46 AM   #2225
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Mzperx, you choose to not disclose your circuit, neather on the phono, nor on the soundcard modification. That´s fine for me but i can not comment any more detailed that way.
One channel of the Super Pocket Phono is working and the other channel is ready soon.
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Old 4th May 2011, 01:53 AM   #2226
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Here are some pictures.
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File Type: jpg Super Pocket Phono Top.jpg (113.0 KB, 351 views)
File Type: jpg Super pocket Phono Bottom.jpg (109.7 KB, 340 views)
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Old 4th May 2011, 01:57 AM   #2227
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Here is the circuit diagram and an alternative input section.
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File Type: pdf SAM Frickelfest 2011 TI.TSC - TINA.pdf (83.6 KB, 191 views)
File Type: pdf SAM Cascode Pre-Pre FF2011 Transdiode.TSC - TINA.pdf (50.6 KB, 155 views)
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Old 4th May 2011, 02:52 PM   #2228
RCruz is offline RCruz  Switzerland
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What type of resistors are you using ?

I really like your hard core p2p builds
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Old 4th May 2011, 03:02 PM   #2229
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Thanks, they work very well. The resistors are sold under the Yageo brand but made as far as i know in Germany at Vitrohm. It is a 1% metal film. They are inexpensive but very good. I use them in prototypes and less expensive gear. Maybe i can find the specs.
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Old 4th May 2011, 03:06 PM   #2230
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here we go....
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File Type: pdf YAG.pdf (50.2 KB, 116 views)
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