OLD THREAD Hi-end phono preamplifier by Andrea Ciuffoli - Page 38 - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Quanghao Audio Design

Quanghao Audio Design Quanghao Audio Design is a producer of DIY Audiophile Kits and PCB boards, selected from many listening tests!

Reply
 
Thread Tools Search this Thread
Old 18th April 2011, 07:25 AM   #371
diyAudio Member
 
Join Date: Sep 2009
Location: Vietnam
Blog Entries: 2
Send a message via Yahoo to quanghao
Quote:
Originally Posted by pred View Post
Hello guys,

I must be blind. I started to populate the regulator board and do not see R12 bleeder resistor nowhere. Where is it?

Thanks,
Pred
!it is near the cap 220uF!
__________________
Group buy DAC-END R (ES9018) full assembled board
update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html
  Reply With Quote
Old 18th April 2011, 11:08 AM   #372
pred is offline pred  Switzerland
diyAudio Member
 
Join Date: Aug 2004
Location: Neuchatel
Quote:
Originally Posted by quanghao View Post
!it is near the cap 220uF!
Hello, I must admit I still do not see it. Can you circle it for me on the jpg of your layout please.

Regards,
Pred
  Reply With Quote
Old 18th April 2011, 11:48 AM   #373
diyAudio Member
 
Join Date: Sep 2009
Location: Vietnam
Blog Entries: 2
Send a message via Yahoo to quanghao
Quote:
Originally Posted by pred View Post
Hello, I must admit I still do not see it. Can you circle it for me on the jpg of your layout please.

Regards,
Pred
Yes it does have on board! but you weld it at the bottom capacitor 220uF 2 children, or no longer needed! it only to discharge the voltage!
__________________
Group buy DAC-END R (ES9018) full assembled board
update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html
  Reply With Quote
Old 4th May 2011, 11:22 AM   #374
Josep is offline Josep  Europe
diyAudio Member
 
Join Date: Jan 2002
Location: Europe
Default pcbs

Hello,

Is still possible to buy the phono + PS pcb?

Thanks
  Reply With Quote
Old 7th May 2011, 04:07 AM   #375
diyAudio Member
 
Join Date: Sep 2009
Location: Vietnam
Blog Entries: 2
Send a message via Yahoo to quanghao
Quote:
Originally Posted by Josep View Post
Hello,

Is still possible to buy the phono + PS pcb?

Thanks
yeS! i stil have some PCB
Thanks
Quanghao
__________________
Group buy DAC-END R (ES9018) full assembled board
update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html
  Reply With Quote
Old 13th July 2011, 08:23 PM   #376
geek_83 is offline geek_83  Poland
diyAudio Member
 
Join Date: May 2007
Hi
What do You think about using Russian SGM-4 Silver Mica CAPACITORS ??
ananiashvili2006 | eBay
  Reply With Quote
Old 16th July 2011, 02:42 AM   #377
sugarn is offline sugarn  Thailand
diyAudio Member
 
Join Date: Jun 2004
Location: Bangkok
What is the Cag value of D3A tube in triode connect?
  Reply With Quote
Old 19th July 2011, 08:03 PM   #378
frd__ is offline frd__  Poland
diyAudio Member
 
Join Date: Aug 2007
Quote:
Hi
What do You think about using Russian SGM-4 Silver Mica CAPACITORS ??
ananiashvili2006 | eBay
I use them in this project - RIAA filter section. However, I have not run the board yet. Constant lack of time. I'll let you know how they are doing...

Cheers,
Frd
  Reply With Quote
Old 24th November 2011, 03:20 PM   #379
Josep is offline Josep  Europe
diyAudio Member
 
Join Date: Jan 2002
Location: Europe
Default riaa changes

Is correct to change Rp to 1M and R1 to 280K in order to use C1=0.01uF and C2=0.0033uF (I have Auricaps 1% for these values)?

riaa.jpg

Thanks

Josep
  Reply With Quote
Old 19th January 2012, 01:27 PM   #380
diyAudio Member
 
Join Date: Nov 2008
Hello,
is it still possible to buy a phono stage and and a shunt regulator. If i ngo on Quanghao it tells me no carrier to germany or switzerland?!!
Kind regards, Michael
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
OLD THREAD DAC End by Andrea Ciuffoli quanghao Quanghao Audio Design 2062 23rd May 2014 03:30 AM
Hi-end phono preamplifier quanghao Quanghao Audio Design 8 30th June 2010 03:37 AM
The DAC End 2 by Andrea Ciuffoli pcb + most parts... prooptiki Swap Meet 7 31st May 2010 02:21 AM
Custom designed transformer for Andrea Ciuffoli 6c33c OTL AMP.... zxcxz Tubes / Valves 2 10th July 2009 04:14 PM
Andrea Ciuffoli Mosfet Amp DieterD Solid State 16 24th December 2001 05:56 AM


New To Site? Need Help?

All times are GMT. The time now is 06:34 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2