Go Back   Home > Forums > > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Twisted Pear Superior quality electronic kits

Reply
 
Thread Tools Search this Thread
Old 24th March 2010, 08:37 PM   #221
Russ White is offline Russ White  United States
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Quote:
Originally Posted by steve jones View Post
Was wondering how warm/hot the Sabre chip runs on the Buffalo II PCB?

Was intending to mount it bottom side flush (with reliefs cut for misc capacitors and inductors) on a piece of spruce like my Attraction DAC.

Russ, any opinion if this would overheat the chip or not?
It runs very cool.

On the Buf32S it ran pretty warm because of the hot opamps adjacent to it.
__________________
Less pulp more juice Twisted Pear
Audio
/Twisted Pear Audio Blog
  Reply With Quote
Old 24th March 2010, 08:45 PM   #222
NicMac is offline NicMac  Italy
diyAudio Member
 
NicMac's Avatar
 
Join Date: Feb 2009
Buffalo II
Quote:
Originally Posted by Russ White View Post
The output voltage of our AVCC modules is ~3.5V on both sides It will vary a little from part to part.
Russ, is this because 3V5 sounds better than 3V3 or is it because the shunt reg works better at this output voltage?
Thanks,
Nic
  Reply With Quote
Old 24th March 2010, 08:48 PM   #223
Russ White is offline Russ White  United States
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
It's because it sounds better. The higher swing gives it better DNR.
__________________
Less pulp more juice Twisted Pear
Audio
/Twisted Pear Audio Blog

Last edited by Russ White; 24th March 2010 at 09:17 PM.
  Reply With Quote
Old 24th March 2010, 08:53 PM   #224
toufu is offline toufu  United States
diyAudio Member
 
Join Date: Jun 2008
Location: San Francisco
Got my Buffalo II board, thanks!

One question, I am planning on using the Lampizator as the output. What should the loading resistor be? On Lampizator's page, he mentions that 39ohm? Is that correct?
  Reply With Quote
Old 24th March 2010, 09:01 PM   #225
Steamerzone is offline Steamerzone  Netherlands
diyAudio Member
 
Join Date: Dec 2009
Quote:
Originally Posted by acidbrain View Post
Received mine without TAXES !
Havent recieved mine yet....but the no taxes idea sounds good to me....

Hope I'll recieve it just before the weekend....that would be just....:-)

Emile (shipping was on March 19, 2010)
  Reply With Quote
Old 24th March 2010, 09:18 PM   #226
Russ White is offline Russ White  United States
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Quote:
Originally Posted by toufu View Post
Got my Buffalo II board, thanks!

One question, I am planning on using the Lampizator as the output. What should the loading resistor be? On Lampizator's page, he mentions that 39ohm? Is that correct?
You would have to ask the lampizator.
__________________
Less pulp more juice Twisted Pear
Audio
/Twisted Pear Audio Blog
  Reply With Quote
Old 24th March 2010, 09:32 PM   #227
fierce_freak is offline fierce_freak  United States
diyAudio Member
 
Join Date: Jul 2007
Send a message via ICQ to fierce_freak Send a message via AIM to fierce_freak Send a message via MSN to fierce_freak Send a message via Yahoo to fierce_freak
Quote:
Originally Posted by steve jones View Post
I've got a custom 48% nickel core pair ordered from Bud Purvine at Onetics. The primary will simply be connected between + and - outputs (for each DAC channel) and primary's center tap left floating.

1:1 ratio for a single ended output voltage of around 3.03V peak to peak dependant upon AVCC voltage. Or ground the secondary's center tap for a balanced output.

Simple. Hopefully not too much so.
Thanks for your info. Is that 3.03V balanced out?

I've read that it's best to use the sabre chip as voltage out when pairing with transformers. What kind of specs would this require for the transformer? Higher DCR of the windings or a resistor strapped across the primaries?
  Reply With Quote
Old 24th March 2010, 10:44 PM   #228
Jeffrey Davison is offline Jeffrey Davison  United States
diyAudio Member
 
Join Date: Sep 2006
I have a pair of these in my stash and was thinking of using them. Would they work?
Sowter Transformer 9762 DAC INTERFACE FOR AD1865N-J

JD
  Reply With Quote
Old 24th March 2010, 11:48 PM   #229
Magsy is offline Magsy  United Kingdom
diyAudio Member
 
Join Date: Jan 2005
Location: Wales
Mine arrive today, thanks, looks excellent and packaging is good!

Bloody OPA1632 appears to be in short demand and my already delayed back order by RS is nowing showing late July for delivery! Hah, serves me right.
  Reply With Quote
Old 24th March 2010, 11:54 PM   #230
merlin el mago is offline merlin el mago
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Received today mine Buffalo II, IVY III, Placid & Placid Bipolar & Transformer 2 x 115V 30VA, to use it for 230V I have to connect togheter grey & violet so the fase is brown, right?
  Reply With Quote

Reply


Buffalo IIHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Buffalo Tweaking jkeny Digital Line Level 316 10th March 2010 10:14 PM
Hello from Buffalo NY chris emo Introductions 1 13th July 2007 05:24 AM
Buffalo brains macmeech Introductions 1 15th June 2004 07:03 PM


New To Site? Need Help?

All times are GMT. The time now is 04:26 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki