The Kuartlotron - keantoken's simple error-correction superbuffer

[keantoken]

Use 15V with the 150R resistors. The resistors are selected based on voltage, they don't determine the voltage. The regulators on board regulate the buffer to +-10V.

 

[keantoken]

For the rest of your questions, it looks good to me.

 

[patriz]

Hi kean, are the boards still available?
regards
Giorgio

 

[keantoken]

Yes, you can PM me.

 

[patriz]

I plan to make an active 12dB xo for my three ways system , any inconvenient in using this buffer in the active stage ? Is R8 , 10k, acting as filter component in the HP ?

aa.JPG - Google Drive

 

[keantoken]

That should be fine.

 

[beardman]

Hi
some question

what funktion have the 2 uhenry coil

No caps on in and output ?

0.25w resistor ok ?

Best Bjarne

 

[keantoken]

The 2uH coil is a simple stability compensation.

The board has no DC blocking capacitors.

0.25W resistors are used for everything except on the on-board regulators where 0.5W resistors are needed at higher input voltages.

 

[beardman]

Fine answer
tomorrow i vil order board...and try it with my volume pot as a preamp

 

[beardman]

Hi

can the Buffer be used on output on DDdac pcm1794 ,,any body now that ?

 

[Destroyer OS]

Why not? It has already gone I/V conversion so you can follow with whatever you want. But you would want different psu's.

 

[hkknudsen]

Hi,

I believe I've read it somewhere, but I can't find it; can the Kuartlotron drive several outputs simultaneously, so I can use it to attach a subwoofer?

Thanks

 

[keantoken]

Yes, that should be fine.

 

[Destroyer OS]

I had some resistors bringing down my voltage just a hair (big resistors). I've got to say that I pulled them out because I was experiencing some problems with the volume I was trying to play at. Now that my voltage is a bit higher, I can play without that problem. It's my opinion that the voltage recommendations are too low unless you have 91db or better speakers.

I have a 2x12v transformer, and in retrospect I'd love to increase it - probably will at some point.

I'm using the older boards that had the error between some pico cap and resistor, without the regulators.

 

[keantoken]

If you must increase the voltage, trim R5 so that TP is half of V+.

 

[Destroyer OS]

If you must increase the voltage, trim R5 so that TP is half of V+.

Done.

I'm at 12.71v and 6.35v now. If there is a sonic change, I'm not completely certain. Maybe slightly smoother and easier to read, but it took a minute to do with my double stack layout so it wasn't very back to back.

My caps are only 16v. I'd have to upgrade them to upgrade voltage. We'll see

 

[Destroyer OS]

PRAT may be better.

 

[audiostar]

keantoken,

I sent you a PM.

 

[RCruz]

Hello Kean

I would like to implement the kuartlotron in the output of my new paradise build that has +-18Vcc

Can I power the kuart with these voltages without major surgery ?

 

[Destroyer OS]

Do you have the version with voltage regulation or not?