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-   -   The Kuartlotron - keantoken's simple error-correction superbuffer (https://www.diyaudio.com/forums/analog-line-level/251413-kuartlotron-keantokens-simple-error-correction-superbuffer.html)

Joachim Gerhard 18th February 2014 12:24 AM

Well, not cut but just take the krocodile clips away.

Joachim Gerhard 18th February 2014 12:33 AM

Take away the green and yellow clips from the ground plane on the buffer.

Martina Schoener 18th February 2014 12:33 AM

Hi Joachim

... I am off driving to Vienna now, but will take the Kiso and Amp with me
so either there or when I am back I will try that
- signal source then in Vienna might be the Immedia from Michi , his CD Digital pre
or my blutooth Iphone files ;-)

Looooooong drive now!
Good Night!

Martina

Joachim Gerhard 18th February 2014 12:39 AM

OK.
The other could try in simulation if a floating supply works.
I found it works most of the time also with other circuits.
There is much more to say about this but that has to wait for later.

Martina Schoener 18th February 2014 12:41 AM

PS
.... I would never "cut" crokodiles nor their clamps...
even though removing crokodiles from ones buffer might need "expertise'
.... Crokodile dundees everywhere

Martina Schoener 18th February 2014 12:46 AM

1 Attachment(s)
Hopefully better image now
Attachment 400521

Joachim Gerhard 18th February 2014 12:50 AM

Yes, that is better.

Joachim Gerhard 18th February 2014 12:53 AM

1 Attachment(s)
This is the Keantoken buffer.

danielwritesbac 18th February 2014 01:57 AM

Quote:

Originally Posted by Joachim Gerhard (https://www.diyaudio.com/forums/analog-line-level/251413-kuartlotron-keantokens-simple-error-correction-superbuffer-post3823573.html#post3823573)
It could work on a floating suppy. So 20V with no ground connection.

Quote:

Originally Posted by Joachim Gerhard (https://www.diyaudio.com/forums/analog-line-level/251413-kuartlotron-keantokens-simple-error-correction-superbuffer-post3823600.html#post3823600)
OK.
The other could try in simulation if a floating supply works.
I found it works most of the time also with other circuits.
There is much more to say about this but that has to wait for later.

A small bit of data:
Yes, that works.
The 50/50 resistor divider used on mine is 400 ohms and 400 ohms (with 0v at centerpoint), and the power is 20v with LM317. Generally, a chip buffer will perform horribly with that setup; however, it didn't bother Kuartlotron at all. It didn't go dull! I could have assembled a chip based solution faster, but it would not have completed quickly due to performance. However, the Kuartlotron assembled reasonably quick, and "scored a home run" with its good performance meaning it was completed. SO, despite messing with transistors and layout, the Kuartlotron, being a plug and play performer, is actually the easiest buffer solution that I know of.
You won't get stuck with resolution and tone issues--those are problems it does Not have.

danielwritesbac 18th February 2014 04:21 AM

Quote:

Originally Posted by RCruz (https://www.diyaudio.com/forums/analog-line-level/251413-kuartlotron-keantokens-simple-error-correction-superbuffer-post3823291.html#post3823291)
Any recommendations on what to use for the coils L1 2uH ?

For historical references only, here is the older version of Kuartlotron that doesn't use the inductor. http://www.diyaudio.com/forums/attac...stabilized.png
P.S.
I have a model that is older than that and it still outperforms a chip. :D
P.P.S.
Post #26 has an easy way to build the inductor for the new model.


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