Looking for silver digital coax - Page 6 - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 3rd October 2012, 06:59 PM   #51
diyAudio Member
 
s3tup's Avatar
 
Join Date: Dec 2004
Location: Israel
Merlin, how do you drive such low impedances?
Opamps are ruled out. Most of the buffers too. I'm aware of only one buffer which could drive such load, but it cost quite a lot for an IC, and is out of production. TO-3 cased LH0063...

Alternatives...
- LME49600
- Opamp-wrapped BUF634/AD815...
__________________
The missing link between lead and gold in alchemist's world was BS and commerce.

Last edited by s3tup; 3rd October 2012 at 07:08 PM.
  Reply With Quote
Old 3rd October 2012, 07:20 PM   #52
Art M is offline Art M  United States
diyAudio Member
 
Join Date: Oct 2010
Location: SF Bay Area
Default Baffled

Quote:
Originally Posted by xjr100 View Post
If there is something noticable to ears, it cold be seen on measurement equipment.
I enjoy learning, exactly what is it that you are measuring and how do I interpret
the Scope images ?
  Reply With Quote
Old 3rd October 2012, 07:41 PM   #53
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
I use Erno Borbely stuff I/V DAC, lineamp/headphone amp and 75W RMS monobolocks amps. I'm using balanced with two separate PSU and two stereo preamps in two chassis (one for 2 PSU and the other chassis for the 2 preamp)

Preamp topology

"The input JFET-Cascode, consisting of Q1-Q2-Q3 and Q4 are operated at 2 mA. Q1 and Q2 have to be matched to 10% of Idss. The second stage, consisting of JFETs Q6-Q9 and MOSFETs Q7-Q8, are operating at just below 10mA. Q6 and Q9 have to be selected for Idss>10mA. Note that this also provides matching between the N- and P-channel JFET. The output devices: Q10-Q11 are Hitachi TO-220 MOSFETs. They are operating at approx. 70mA; proper heat sinking is therefore mandatory.

Q5 is a JFET-input servo amplifier, providing tracking of the output offset to less than 1mV. The RC-networks of R10-C6 and R11-C7 filter out all AC signals over 1 Hz. The servo is therefore only operational at less than 1 Hz, and should not affect the sound of the amplifier. Nevertheless, if you feel that it does, donít hesitate to try different opamps for this. D1 and D2 are IC shunt regulators, supplying Q5 with +-10 Volt."
  Reply With Quote
Old 3rd October 2012, 07:52 PM   #54
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Quote:
Originally Posted by s3tup View Post
Merlin, how do you drive such low impedances?
Opamps are ruled out. Most of the buffers too. I'm aware of only one buffer which could drive such load, but it cost quite a lot for an IC, and is out of production. TO-3 cased LH0063...

Alternatives...
- LME49600
- Opamp-wrapped BUF634/AD815...
Borbely 116 lineamp schematic Click the image to open in full size.
Attached Images
File Type: jpg Borbely 116 lineamp 001.jpg (248.3 KB, 88 views)
  Reply With Quote
Old 3rd October 2012, 08:08 PM   #55
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
OK, so you have to use a headphone amp to drive an interconnect.
  Reply With Quote
Old 3rd October 2012, 08:12 PM   #56
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Is a line amp / headphone amp, I use the resistors for the power amp not for the headphones....
  Reply With Quote
Old 3rd October 2012, 08:35 PM   #57
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
Q. What is a line/headphone amp?
A. A headphone amp used, for some peculiar reason, to drive a line.
  Reply With Quote
Old 3rd October 2012, 09:16 PM   #58
cbdb is offline cbdb  Canada
diyAudio Member
 
Join Date: Oct 2008
Location: Vancouver
Quote:
Originally Posted by xjr100 View Post
Here is the picture of Dune HD Base 3.0 media player SPDIF out with cheap cable (7€) vs DH-Labs D-75:
Click the image to open in full size.
And what exactly are you seeing that will make any difference? Anything on the scope above/below threshold (like all the garbage on the top and bottom) makes NO difference to the sound. Please learn about digital electronics.
  Reply With Quote
Old 3rd October 2012, 10:13 PM   #59
diyAudio Member
 
s3tup's Avatar
 
Join Date: Dec 2004
Location: Israel
cbdb, D-75's slew rate seems a bit faster. Does it mean something to you?

Oh, headphone amps... Yep, that's what they are - a good line drivers.
__________________
The missing link between lead and gold in alchemist's world was BS and commerce.
  Reply With Quote
Old 4th October 2012, 10:04 AM   #60
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Quote:
Originally Posted by s3tup View Post
cbdb, D-75's slew rate seems a bit faster. Does it mean something to you?

Oh, headphone amps... Yep, that's what they are - a good line drivers.
  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
Northwest Analogue Gold Plated Pure Silver Digital Coax dominic harper Vendor's Bazaar 0 8th November 2011 10:12 PM
FS: Hawthorneaudio Silver IRIS 15" coax drivers UK barackuda Swap Meet 6 28th August 2008 10:46 PM
Digital Coax to 5.1 Analog? ak_47_boy Digital Source 9 16th November 2006 03:24 PM
DIY Digital Coax ralph-bway Everything Else 1 9th July 2004 08:03 PM
Coax digital out to computer hoongern Digital Source 3 27th February 2004 10:16 PM


New To Site? Need Help?

All times are GMT. The time now is 11:44 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