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

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

The Kuartlotron - keantoken's simple error-correction superbuffer
The Kuartlotron - keantoken's simple error-correction superbuffer
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 6th March 2014, 01:19 AM   #101
baswamin is offline baswamin  India
diyAudio Member
 
Join Date: Oct 2011
Hello Keantoken,

I built this buffer (P2P) with capacitance multiplier power supply on left hand side and 2 channels of buffer on the right. It sounds pretty good with most improvement felt in the high frequencies which are reproduced very well. It may be due to my cables causing some reduction in high frequencies. Need to listen more.

Thanks
Attached Images
File Type: jpg Photo1293.jpg (220.6 KB, 802 views)
  Reply With Quote
Old 6th March 2014, 01:29 AM   #102
Joachim Gerhard is offline Joachim Gerhard  Germany
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
It is a very good sounding buffer for sure. We just have to sort out that distortion issue at higher amplitudes. I mean for the record. I do not care much about super low distortion anyway. Then an AD797 configured for 0dB gain would be the end of the story. That kind of buffer whould measure the measurement equipment ( Audio Precission ).
For example MBL do it that way.
  Reply With Quote
Old 6th March 2014, 01:54 AM   #103
keantoken is offline keantoken  United States
diyAudio Member
 
keantoken's Avatar
 
Join Date: Aug 2006
Location: Texas
I'm glad you like it Baswamin.
__________________
The Kmultiplier rail filter! -=- The Simple Kuartlotron Superbuffer!
Need something built, repaired or modded? PM me and ask what I can do!
  Reply With Quote
Old 6th March 2014, 02:21 AM   #104
ammel68 is offline ammel68  United States
Banned
 
Join Date: Sep 2009
Location: Southeast, U.S.
The Kuartlotron - keantoken's simple error-correction superbuffer
Quote:
Originally Posted by Joachim Gerhard View Post
Then an AD797 configured for 0dB gain would be the end of the story.
I thought I read somewhere that the AD797 is not easy to implement as a unity gain buffer.
  Reply With Quote
Old 6th March 2014, 01:33 PM   #105
taisho_daniel is offline taisho_daniel  Philippines
diyAudio Member
 
Join Date: Jan 2010
Hi Joachim. Since you've listened to both, how would you compare this buffer to the Curl/ Borbely style cascoded BF862 buffer you used for the ES9023 filter?
  Reply With Quote
Old 6th March 2014, 01:52 PM   #106
RCruz is offline RCruz  Switzerland
nhinstruments
diyAudio Member
 
RCruz's Avatar
 
Join Date: Sep 2006
Location: Wallis
The Kuartlotron - keantoken's simple error-correction superbuffer
Quote:
Originally Posted by Joachim Gerhard View Post
. We just have to sort out that distortion issue at higher amplitudes. I mean for the record. I do not care much about super low distortion anyway.
Would you explain what you mean ?

Does it produce audible distortions with 1v input ?
__________________
RC
  Reply With Quote
Old 6th March 2014, 02:28 PM   #107
Joachim Gerhard is offline Joachim Gerhard  Germany
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
I can not hear better then 1% 2nd harmonic and 0.1% 3rd.
So, no, it does not sound distorted in any way.
The AD797 can be made as a stable buffer easy.
No, i did not direct compare the Kean to my floating cascode buffer but i compared my buffer to the Calvin. The Calvin has more slam and punsh and has a particular way to sound warm but without loss of detail or resolution.
I compared the Calvin against the Kean. Well., Martina may be able to describe that better.
Ricardo, when you see the distortion measurements we made on the Kean buffer i build ( TKD pot, no distortion trim ) it has minimum distortion at 200mV. Advancing the volume the distortion rises.
  Reply With Quote
Old 6th March 2014, 03:55 PM   #108
keantoken is offline keantoken  United States
diyAudio Member
 
keantoken's Avatar
 
Join Date: Aug 2006
Location: Texas
My build gets at most 0.0003% THD at 850mV pk-pk input, which is the max for my soundcard. I think something went wrong with Joachim's build. My build shows extremely low distortion.
__________________
The Kmultiplier rail filter! -=- The Simple Kuartlotron Superbuffer!
Need something built, repaired or modded? PM me and ask what I can do!
  Reply With Quote
Old 6th March 2014, 04:04 PM   #109
Joachim Gerhard is offline Joachim Gerhard  Germany
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
Can you show the measurements ?
What is the input impedance of your soundcard ?
  Reply With Quote
Old 6th March 2014, 04:13 PM   #110
keantoken is offline keantoken  United States
diyAudio Member
 
keantoken's Avatar
 
Join Date: Aug 2006
Location: Texas
Both channels show the same THD and spectrum, so it may have to do with the pot or the batch of transistors used. I used

I've had a used cable TV splitter sitting on my desk for months, and I had the idea to build a Kuartlotron into it. Then I realized it would double as a video buffer. Lol!

Sounds like a good idea anyways, except I'd have to use coaxial interconnects which would be awkward.
__________________
The Kmultiplier rail filter! -=- The Simple Kuartlotron Superbuffer!
Need something built, repaired or modded? PM me and ask what I can do!
  Reply With Quote

Reply


The Kuartlotron - keantoken's simple error-correction superbufferHide 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
New error correction amp PMA Solid State 101 3rd January 2011 11:00 PM
error correction et al' sq225917 Digital Source 4 7th August 2007 10:16 AM
Visual error correction? Circlotron Everything Else 4 15th September 2003 04:17 PM


New To Site? Need Help?

All times are GMT. The time now is 02:21 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki