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Old 4th April 2012, 02:56 PM   #1
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Default Cheap and good op-amp phono preampl. with zero noise

Look here for the project details

Claudio Hi-end Phono
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Old 4th April 2012, 05:02 PM   #2
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Ja ja ja, the only way to have "zero noise" is at 0°K and a very far point from earth.

Ridiculous.
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Old 4th April 2012, 06:24 PM   #3
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The use of these op-amp with very low value resistors and the virtual battery operation allow zero noise.
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Old 4th April 2012, 07:11 PM   #4
DF96 is offline DF96  England
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I assume by "zero noise" you don't actually mean zero noise.
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Old 4th April 2012, 07:14 PM   #5
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true,
tnk
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Old 5th April 2012, 01:15 PM   #6
oshifis is offline oshifis  Hungary
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It is easy: create negative noise, add it to positive noise, they cancel and voilá: you get zero noise
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Old 5th April 2012, 01:18 PM   #7
AndrewT is online now AndrewT  Scotland
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zero noise = noise my Grand Ma can't hear from the other side of the house.
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Old 5th April 2012, 02:56 PM   #8
raul_77 is offline raul_77  Europe
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Hi,

Well, the low level in the measuers are -80dB, very good for a phono preamp but no 'zero noise'. Yes, really very low noise.

But, for me, the most interesting part are the power supply... that lacks the values of the components.

Have you the complete values of the power supply? Please, can you post here?

Happy days
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Old 29th May 2012, 07:06 PM   #9
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Here the power supply components
Attached Images
File Type: gif Pww1.gif (30.4 KB, 226 views)
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Old 29th May 2012, 08:25 PM   #10
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If the purpose of this pre is merely to feed a digital preamp, i cannot help but wonder: can the Tact not take care of the RIAA? Then you could get away with just some linear gain and even less noise
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