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#101 |
diyAudio Member
Join Date: Oct 2011
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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 |
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#102 |
diyAudio Member
Join Date: Mar 2009
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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. |
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#103 |
diyAudio Member
Join Date: Aug 2006
Location: Texas
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I'm glad you like it Baswamin.
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__________________
The Kmultiplier rail filter! -=- The Simple Kuartlotron Superbuffer! Need something built, repaired or modded? PM me and ask what I can do! |
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#104 |
Banned
Join Date: Sep 2009
Location: Southeast, U.S.
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#105 |
diyAudio Member
Join Date: Jan 2010
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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?
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#106 | |
nhinstruments
diyAudio Member
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Quote:
Does it produce audible distortions with 1v input ?
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RC |
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#107 |
diyAudio Member
Join Date: Mar 2009
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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. |
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#108 |
diyAudio Member
Join Date: Aug 2006
Location: Texas
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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! |
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#109 |
diyAudio Member
Join Date: Mar 2009
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Can you show the measurements ?
What is the input impedance of your soundcard ? |
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#110 |
diyAudio Member
Join Date: Aug 2006
Location: Texas
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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! |
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