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Old 23rd September 2012, 05:58 PM   #7401
pdul is offline pdul  Denmark
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No contact lenses to extend the vision to reach the glasses.
In short, no preamp.
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Old 24th September 2012, 02:59 PM   #7402
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I am going to post shortly a balance topology I have tried to prototype.
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Old 24th September 2012, 04:04 PM   #7403
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As far as i can tell this is a linear stage without RIAA. When you ramp up the gain you get noise, sure. If you would put a transimpedance RIAA after the mirror your noise from 1 kHz and up would drop. If you ramp up the open loop gain to 80dB plus transimpedance RIAA your gain at 20kHz would be 40dB, so 10dB less noise then what you have right now.
The gain of that RIAA would be 60dB nominal. Are the sources of 2SJ74 connected to the cascades and when, why ? There are other measures to lower the noise, that comes later.
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Old 24th September 2012, 04:57 PM   #7404
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Joachim...

for some reason my post above disappeared....where you commenting at my post?
It's not there anymore....
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Old 24th September 2012, 05:01 PM   #7405
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I do not know why it disappeared. I thought you had erased it to correct an error.
I have downloaded your circuit though and it is pretty cool. Yes, my commend was targeted at this post. Please repost it.
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Old 24th September 2012, 05:11 PM   #7406
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I am sending you an email...
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Old 24th September 2012, 07:09 PM   #7407
RCruz is offline RCruz  Switzerland
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Hi Stefanoo

Would you please repost your schematic ?
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Old 24th September 2012, 08:02 PM   #7408
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After chatting in private with joachim, I decided under his request to repost it.

The disclaimer is this:

I will open up a new thread and the name of it, chosen by our master Joachim is Masterpiece as it is based on the Paradise's technology.
Also, this is not going to be a group by, so the experienced people here will be able to build it on their own.
I will be in charge for building concept prototypes and test solution so that we can easily move forward.
the circuit has to be considered as a starting point as it needs adjustments.

I will post shortly and link here the new thread.
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Old 24th September 2012, 08:04 PM   #7409
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Good solution i think.
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Old 24th September 2012, 08:39 PM   #7410
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Thanks Joachim...this is going to be a very exciting project.

Link to the new thread:

Masterpiece
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