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Naim NA322 MM phono board
Naim NA322 MM phono board
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Old 4th January 2019, 06:31 PM   #11
vsmusic is offline vsmusic  Russian Federation
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Join Date: Oct 2013
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JimSalabim - Thank You ! I started making the circuit Board . About Pinout 550/560 I know . About a result work - I write on this forum ... I like vintage schematics . And I have some preamps built from the old schematics . They sound great .

Last edited by vsmusic; 4th January 2019 at 06:34 PM.
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Old 16th March 2019, 04:24 PM   #12
vsmusic is offline vsmusic  Russian Federation
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Click the image to open in full size.Click the image to open in full size. Click the image to open in full size. Click the image to open in full size. .....Very good sound !
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Old 18th March 2019, 01:13 PM   #13
JimSalabim is offline JimSalabim  Germany
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Very nice! Looks great!
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Old 18th March 2019, 01:36 PM   #14
vsmusic is offline vsmusic  Russian Federation
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JimSalabim - Thanks for the scheme ! I applied a gain of 40 dB . I also want to add switching capacitance and resistance input . It will soon .
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Old 18th January 2020, 08:31 PM   #15
neiljadman is offline neiljadman  United States
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Quote:
Originally Posted by VictorDQ View Post
Jim, This clone does not know how close it is to the original.
Attachment 723408
And yes I do know how close it is and why i is slightly different -with added power rail decoupling and more modern component selections, this is actually superior to the Naim circuit.

Your execution looks great - I assume it sounds as good as it looks

Last edited by neiljadman; 18th January 2020 at 08:34 PM.
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Old 19th January 2020, 10:46 AM   #16
vsmusic is offline vsmusic  Russian Federation
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Hello everybody! Almost a year has passed . I changed the design of the preamp . I made a motherboard with star grounding . Made the input capacity switch ( 100, 150, 200, 250 pf ). Made the input resistance switch ( 22k, 33k, 47k , 62k, 75k, 100k). Installed gold-plated pins on the preamp Board . Now the Board is easily removed-if necessary . I still like the sound of that .Click the image to open in full size.Click the image to open in full size.

Last edited by vsmusic; 19th January 2020 at 10:50 AM.
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Old 2nd May 2020, 03:02 AM   #17
Mr. dB is offline Mr. dB  United States
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Quote:
Originally Posted by VictorDQ View Post
Jim, This clone does not know how close it is to the original.
Attachment 723408
That's from Neil James and it can be trusted.
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Old 11th August 2020, 12:35 AM   #18
vsmusic is offline vsmusic  Russian Federation
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diy NA-322...
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