OLD THREAD DAC End by Andrea Ciuffoli - Page 192 - 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 29th July 2010, 03:32 AM   #1911
phrarod is offline phrarod  United States
diyAudio Member
 
Join Date: Aug 2005
Quote:
Originally Posted by quanghao View Post
Hi phrarod!
you can make groub by Os-con 47uF Sp in this topic???

Many member like it!
Thank
http://www.quanghao.com
I'm almost sold out already. Let's see how this first run goes. In the past I've made group buys for other forums and got stuck with product when people backed out. If enough people really show an interest I'll try to do it again.

I want to help the DIY community. Just be aware that if people pay by paypal which is the easiest for everyone the buyer has to cover the paypal fees. 3.5% US and 5% international. I hate it too but its not in my control. Shipping of course is extra.

Since these are no longer made and the only other kind is Black Gate which are no longer made (I prefer OSCON myself) it makes sense to stock up on these. I'm surprised no one has filled the vacancy by BG and OSCON but its been several years. Maybe it just doesn't pay for such a small market?
  Reply With Quote
Old 29th July 2010, 07:47 AM   #1912
diyAudio Member
 
Join Date: Sep 2009
Location: Vietnam
Blog Entries: 2
Send a message via Yahoo to quanghao Send a message via Skype™ to quanghao
I think you don't worry about it!
thanks!
__________________
Group buy DAC-END R (ES9018) full assembled board
update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html
  Reply With Quote
Old 29th July 2010, 10:26 PM   #1913
phrarod is offline phrarod  United States
diyAudio Member
 
Join Date: Aug 2005
Ok, Quanghao.

I think there should be two group buys. One for transformers. O-netics really is superior transformers. If you're not familiar with them do a search. Never a bad word. As most of you know PSU is 75% of the whole equation. I already have the same setup as Quanghao is selling BUT I have the old AN board with only three power inputs. I'm rebuilding the board specifically because of the implantation of the Salas power supply.

Everyone can set it up and pay Bud. I would imagine he would want a deposit so he doesn't end up winding PT's that end up on the shelf.

Everyone interested in more OSCON 47/16 caps PM me. If it looks like there's serious interest I will order another round.
  Reply With Quote
Old 30th July 2010, 03:46 PM   #1914
diyAudio Member
 
Join Date: May 2007
Location: Brazil Recife
Quote:
Originally Posted by quanghao View Post
Updated received list.

Please tell me if you have received DAC-End PCB:
1. sugden
2. phrarod
3. Ferrari
4. rolotube
5. pathetic
6. damohpi
7. hotzman
8. Yomanze
9. lucylu
10.wobii
11.ulyses31
12. flocchini
13. klaju1955

No get PCb DAC-up dat
1. COX77
.....
I received, thank you Quang Hao
  Reply With Quote
Old 30th July 2010, 09:15 PM   #1915
diyAudio Member
 
Join Date: Feb 2004
Location: Davis,CA
Quanhao

Is the bleeder resistor R8 needed for Salas HV? I believe it should be 270k if it is.

Thanks

Bob
  Reply With Quote
Old 30th July 2010, 11:28 PM   #1916
diyAudio Member
 
Join Date: Feb 2004
Location: Davis,CA
Quanghao

Is Q5 on the HV Salas a 2N2904 or a 2N2906?
In the BOM it says 2904 but the board says 2906. I believe one is a PNP whereas the other is a NPN.

Thanks

Bob
  Reply With Quote
Old 31st July 2010, 01:00 AM   #1917
damohpi is offline damohpi  Australia
diyAudio Member
 
Join Date: Dec 2006
Location: BNE, AU
the board is 2N3906 which is PNP?
  Reply With Quote
Old 31st July 2010, 01:04 AM   #1918
diyAudio Member
 
Join Date: Feb 2004
Location: Davis,CA
Quote:
Originally Posted by flocchini View Post
Quanghao

Is Q5 on the HV Salas a 2N2904 or a 2N2906?
In the BOM it says 2904 but the board says 2906. I believe one is a PNP whereas the other is a NPN.

Thanks

Bob
That should be 2N3904 and 2N3906

Sorry
  Reply With Quote
Old 31st July 2010, 01:10 AM   #1919
damohpi is offline damohpi  Australia
diyAudio Member
 
Join Date: Dec 2006
Location: BNE, AU
I see, looks like the BOM is incorrect, the schematic has 2N2904A which is PNP (as is 2N3906)

Quanghao can confirm..
  Reply With Quote
Old 31st July 2010, 01:54 AM   #1920
diyAudio Member
 
Join Date: Sep 2009
Location: Vietnam
Blog Entries: 2
Send a message via Yahoo to quanghao Send a message via Skype™ to quanghao
yes! That is 2N3906!
__________________
Group buy DAC-END R (ES9018) full assembled board
update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html
  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 Hi-end phono preamplifier by Andrea Ciuffoli quanghao Quanghao Audio Design 397 25th January 2014 06:16 PM
Cleo: End to End 24bit 192khz USB DAC with tube output bcherry DIY HiFi Supply 7 3rd July 2010 11:15 PM
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 04:33 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