OLD THREAD DAC End by Andrea Ciuffoli - Page 53 - 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 5th February 2010, 01:47 PM   #521
vzs is offline vzs  Europe
diyAudio Member
 
Join Date: Dec 2005
Location: Cluj-Napoca, Romania
Default Low voltage tubes?

Quote:
Originally Posted by adamus View Post
yes it can, but it would need a redesign of the PSU (i would forget using the PS pcb, unless you want to keep the filament supply section) and then as you say, changing values.

if you are worried about the voltage.... read read read, then bite the bullet and do a high voltage project.,
The PSU pcb could remain, the 6.3V filament supply is OK, only the high voltage part must be adapted for lower voltage, 12 or 24 V.

A single simpler transformer could be used that would fit all.
And yes, maybe I'm worried a bit of the high voltages and if there is an alternative I would try that.

Is somebody who can help on this?

Thanks!

Last edited by vzs; 5th February 2010 at 01:59 PM.
  Reply With Quote
Old 5th February 2010, 02:08 PM   #522
diyAudio Member
 
apelizzo's Avatar
 
Join Date: Sep 2006
Quote:
Originally Posted by vzs View Post
The PSU pcb could remain, the 6.3V filament supply is OK, only the high voltage part must be adapted for lower voltage, 12 or 24 V.

A single simpler transformer could be used that would fit all.
And yes, maybe I'm worried a bit of the high voltages and if there is an alternative I would try that.

Is somebody who can help on this?

Thanks!
I had similar aversion and fear towards tube amplifiers.. until I've heard the sound, then all fear went away including my solid state amplifier.

There are low voltage tubes, I know a company using for buffering CD players output. But I don't think you should trade good performance for volts. You need to be methodic and careful as there is a level of danger. First until you are confident work with only one end on HV parts the other keep it in your pocket so if it happens the current does not go from one hand to the other through your heart.

I'll find out anyway if you wish to get used to HV little by little. But this project is mostly all on PCB...
  Reply With Quote
Old 5th February 2010, 02:21 PM   #523
diyAudio Member
 
Join Date: Sep 2009
Location: Vietnam
Blog Entries: 2
Send a message via Yahoo to quanghao
Im Finis DAC-end2! that is ok! Can you see!
Attached Images
File Type: jpg DAC-1.jpg (780.1 KB, 372 views)
File Type: jpg Picture-077.jpg (335.6 KB, 327 views)
File Type: jpg Picture-081.jpg (736.7 KB, 328 views)
__________________
Group buy DAC-END R (ES9018) full assembled board
update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html
  Reply With Quote
Old 5th February 2010, 02:24 PM   #524
diyAudio Member
 
Join Date: Sep 2009
Location: Vietnam
Blog Entries: 2
Send a message via Yahoo to quanghao
and
Attached Images
File Type: jpg Picture-077.jpg (516.9 KB, 289 views)
File Type: jpg Picture-102.jpg (441.2 KB, 246 views)
File Type: jpg Picture-109.jpg (401.8 KB, 133 views)
__________________
Group buy DAC-END R (ES9018) full assembled board
update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html
  Reply With Quote
Old 5th February 2010, 02:33 PM   #525
diyAudio Member
 
Join Date: Sep 2009
Location: Vietnam
Blog Entries: 2
Send a message via Yahoo to quanghao
Quote:
Originally Posted by tassosk View Post
Can I use 180uF/20V Oscons instead 220uf? BOM says 100-220uf
That is Ok!
you can use 100- 220uf max!
Attached Images
File Type: jpg Picture-115.jpg (165.9 KB, 148 views)
__________________
Group buy DAC-END R (ES9018) full assembled board
update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html

Last edited by quanghao; 5th February 2010 at 02:35 PM.
  Reply With Quote
Old 5th February 2010, 02:37 PM   #526
le´flu is offline le´flu  Germany
diyAudio Member
 
Join Date: Mar 2004
Location: Hoexter
Hi Quang Hao,
looking great...... very good work.
Where did you get the housing?

Greetings Ulf
  Reply With Quote
Old 5th February 2010, 02:44 PM   #527
diyAudio Member
 
Join Date: Sep 2009
Location: Vietnam
Blog Entries: 2
Send a message via Yahoo to quanghao
I do not understand this :
**Where did you get the housing? ***
Can you show me please???
Thank you!
__________________
Group buy DAC-END R (ES9018) full assembled board
update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html
  Reply With Quote
Old 5th February 2010, 02:48 PM   #528
le´flu is offline le´flu  Germany
diyAudio Member
 
Join Date: Mar 2004
Location: Hoexter
Hi,
i meant:
where did you buy the box / cabinet / case or what ever
the right word is ;-)

Greetings Ulf
  Reply With Quote
Old 5th February 2010, 02:52 PM   #529
diyAudio Member
 
Join Date: Sep 2009
Location: Vietnam
Blog Entries: 2
Send a message via Yahoo to quanghao
Quote:
Originally Posted by le´flu View Post
Hi,
i meant:
where did you buy the box / cabinet / case or what ever
the right word is ;-)

Greetings Ulf
Oh! now I seen! thank! I buy in the shop in China eshopdiclub.biz
__________________
Group buy DAC-END R (ES9018) full assembled board
update 06/14/2013 :http://www.audiodesignguide.com/DAC32/index2.html
  Reply With Quote
Old 5th February 2010, 03:21 PM   #530
adamus is offline adamus  United Kingdom
diyAudio Member
 
Join Date: Apr 2008
post 524 the salas reg is lit up on the right, yet from the pic no wire from transformer. Have you routed power from another salas reg under the boards?
  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 12:16 PM.


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