Rozenblit Grounded Grid Cascode Pho Preamp Project

contax · 15th October 2008, 02:15 PM

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:-)

dia thien thai · 16th December 2008, 10:22 AM

Can you sent for me cricui plesa! i very neet it! thank

dia thien thai · 22nd December 2008, 07:15 AM

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

contax · 22nd December 2008, 08:59 AM

Hello,

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

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

Best regards:-)

dia thien thai · 22nd December 2008, 09:06 AM

I foun it ! But i live in Viet nam I cant pay money for him !
You can sent fof mee the parlist! thank!

Merlinb · 22nd December 2008, 09:13 AM

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.

dia thien thai · 22nd December 2008, 09:17 AM

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!

revintage · 22nd December 2008, 10:02 AM

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.

contax · 22nd December 2008, 11:43 AM

Sorry, I cannot give you the parts list or the schematic. This is not the purpose of this post.

revintage · 22nd December 2008, 01:46 PM

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.

15th October 2008, 02:15 PM	#1
contax diyAudio Member Join Date: Mar 2008	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 46922 and 112AU7A. Thanks for your help. Best regards:-)

16th December 2008, 10:22 AM	#2
dia thien thai diyAudio Member Join Date: Dec 2006 Location: USA	Can you sent for me cricui plesa! Can you sent for me cricui plesa! i very neet it! thank

22nd December 2008, 07:15 AM	#3
dia thien thai diyAudio Member Join Date: Dec 2006 Location: USA	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

22nd December 2008, 08:59 AM	#4
contax diyAudio Member Join Date: Mar 2008	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:-)

22nd December 2008, 09:06 AM	#5
dia thien thai diyAudio Member Join Date: Dec 2006 Location: USA	Thank I foun it ! But i live in Viet nam I cant pay money for him ! You can sent fof mee the parlist! thank!

22nd December 2008, 09:17 AM	#7
dia thien thai diyAudio Member Join Date: Dec 2006 Location: USA	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!

22nd December 2008, 10:02 AM	#8
revintage diyAudio Member Join Date: May 2007 Location: Eskilstuna, Sweden	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. __________________ Brgds Lars

22nd December 2008, 11:43 AM	#9
contax diyAudio Member Join Date: Mar 2008	Sorry, I cannot give you the parts list or the schematic. This is not the purpose of this post.

22nd December 2008, 01:46 PM	#10
revintage diyAudio Member Join Date: May 2007 Location: Eskilstuna, Sweden	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. __________________ Brgds Lars

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