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Clone of Accuphase C-27 (Project C-28)
Clone of Accuphase C-27 (Project C-28)
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Old 5th November 2017, 06:50 PM   #1
user15102011 is offline user15102011  Russian Federation
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Default Clone of Accuphase C-27 (Project C-28)

Hi all,

just photos of my implementation of great Accuphase phone-stage C-27. I call it Project C-28 because it has only MC-section and there are some small changes in schematics compared with the original one. As for the sound - it`s great! Really.

I hope this may encourage someone uncertain in his forces in repeating the project and enjoy the great variety of music :)

Update 1. Schematic and gerbers can be downloaded from the following link: C-28.
Update 2. DipTrace files can be downloaded from the following link: C28_(2).
Attached Images
File Type: jpg IMG_4362.JPG (134.0 KB, 348 views)
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File Type: jpg IMG_4368.JPG (208.9 KB, 107 views)
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File Type: jpg IMG_4370.JPG (207.9 KB, 107 views)

Last edited by user15102011; 15th November 2017 at 04:08 PM.
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Old 6th November 2017, 07:32 AM   #2
lydlaug is offline lydlaug  Norway
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Location: Stavanger
Clone of Accuphase C-27 (Project C-28)
Schematic?
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Old 6th November 2017, 12:05 PM   #3
user15102011 is offline user15102011  Russian Federation
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Quote:
Originally Posted by lydlaug View Post
Schematic?
See attachment.

P.S. It seems Moderator has deleted the attachment. Please PM for schematic.

Last edited by user15102011; 6th November 2017 at 12:31 PM.
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Old 6th November 2017, 04:57 PM   #4
kamis is offline kamis  Serbia
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Location: Obrenovac,Serbia
Trade secret?
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Old 6th November 2017, 06:30 PM   #5
Boydk is offline Boydk  Denmark
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Location: Aarhus, Denmark
Hi there.
Watched your thread on the russian website. Nice pictures.
2 questions. Where did you source the PCBs, did you get them made yourself, and are they available for us in the forum?? Maybe with a BOM also???
Waiting for your answer :-)
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Old 6th November 2017, 07:44 PM   #6
user15102011 is offline user15102011  Russian Federation
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Join Date: Oct 2011
Quote:
Originally Posted by Boydk View Post
Hi there.
Watched your thread on the russian website. Nice pictures.
2 questions. Where did you source the PCBs, did you get them made yourself, and are they available for us in the forum?? Maybe with a BOM also???
Waiting for your answer :-)
1. I had to make PCBs myself because I use only MC-section of the preamp. It`s quite hard for the beginner as I am to repeat the full preamp. Yet I don`t need MM-section.
2. I can share them without any restrictions, need only to find them on my PC. As for the BOM I don`t promise it cos don`t have all in a single file, but will give references to very specific components. Guess this is not the main difficulty. Anyway ask your question here.

Regards,
Sergei.
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Old 8th November 2017, 10:22 AM   #7
kamis is offline kamis  Serbia
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Very interesting voltage regulators. Low noise transistors are out of production.
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Old 8th November 2017, 12:56 PM   #8
user15102011 is offline user15102011  Russian Federation
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Quote:
Originally Posted by kamis View Post
Very interesting voltage regulators. Low noise transistors are out of production.
They are still available from Futurlec, I bought them and some others namely there.
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Old 8th November 2017, 06:46 PM   #9
kamis is offline kamis  Serbia
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Quote:
Originally Posted by user15102011 View Post
They are still available from Futurlec, I bought them and some others namely there.
Which gain group? How do you know they are no fake?
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Old 9th November 2017, 12:19 PM   #10
user15102011 is offline user15102011  Russian Federation
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Quote:
Originally Posted by kamis View Post
Which gain group? How do you know they are no fake?
I never claimed they are not fake. But I hope they are not. See the photo.
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