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Old 15th October 2008, 02:15 PM   #1
contax is offline contax  Spain
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Question Rozenblit Grounded Grid Cascode Pho Preamp Project

Hello,

I want to build the GG Phono Preamp project from the Bruce Rozenblit Audio Reality book. I have designed the PCB, but my experience is poor.

Bruce suggest to use a PCB in order to decouple the tubes from chassis vibration and reduce microphonic effects.

Here you can view the layout. I would be very grateful if you could give some advice.

http://www.flickr.com/photos/2590019...91191?edited=1

http://www.flickr.com/photos/2590019...7608056891191/

The top copper layer has been used only for ground tracks and heaters supply. The tubes are 4*6922 and 1*12AU7A.

Thanks for your help.

Best regards:-)
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Old 16th December 2008, 10:22 AM   #2
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Default Can you sent for me cricui plesa!

Can you sent for me cricui plesa! i very neet it! thank
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Old 22nd December 2008, 07:15 AM   #3
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Default Schematic i Wanted

Can you sent for me the parlist about the thi phono! I like it!!
Thank you very much!
my e-mail: quanghao168@yahoo.com.vn
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Old 22nd December 2008, 08:59 AM   #4
contax is offline contax  Spain
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Wink Bruce Rozenblit book

Hello,

You can find the schematic and parts list in the Bruce Rozenblit book:

http://www.transcendentsound.com/audioreality.htm

Best regards:-)
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Old 22nd December 2008, 09:06 AM   #5
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Default Thank

I foun it ! But i live in Viet nam I cant pay money for him !
You can sent fof mee the parlist! thank!
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Old 22nd December 2008, 09:13 AM   #6
Merlinb is offline Merlinb  United Kingdom
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Default Re: Schematic i Wanted

Quote:
Originally posted by dia thien thai
Can you sent for me the parlist about the thi phono! I like it!!
Thank you very much!
my e-mail: quanghao168@yahoo.com.vn
You can view some of the book (and parts list) through google: http://books.google.com/books?id=Bl1...ltiy#PPA105,M1
The schematic page is hidden. But some of the other designs can be viewed.
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Old 22nd December 2008, 09:17 AM   #7
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Default yes

Here you can view the layout. I would be very grateful if you could give some information please!

But the parlit not the the samle this link:

http://www.flickr.com/photos/259001...891191?edited=1

http://www.flickr.com/photos/259001...57608056891191/

Help me! please!
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Old 22nd December 2008, 10:02 AM   #8
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Default Use Paypal

Paypal is not dependant on the country you live in, as long as you have a MC or VISA.

You will the get the book downloadable as PDF.
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Old 22nd December 2008, 11:43 AM   #9
contax is offline contax  Spain
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Sorry, I cannot give you the parts list or the schematic. This is not the purpose of this post.
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Old 22nd December 2008, 01:46 PM   #10
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Contax,
In order to get even better insulation when using PCB i use M3 bolted tube sockets with rubbergrommets.Check the upper tubeholders in the pic.

Click the image to open in full size.
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