The Kuartlotron - keantoken's simple error-correction superbuffer - Page 52

ammel68 · 25th October 2015, 04:05 AM

I'm sure this has probably been covered somewhere, but I can't find the answer(s).

I'm trying to understand how to adjust the 3 trimmer pots.

R5(5K ohms)--adjust until you read 5V at TP?

R9(1M ohms)--adjust for lowest offset at the output? Is this done with the input shorted or does it matter?

R1(100 ohms)--how do you adjust this trimmer?

Thank you!

keantoken · 25th October 2015, 04:08 AM

Have you looked at the schematic in the link in my signature?

ammel68 · 04:48 AM

Yes I have, but I still don't understand how to adjust R1.

Edit--I reread the trimming part again on your site.

Is R1 for adjusting for lowest THD only?
Above that it states 2:"R1=R2". That would indicate to me to adjust it to the same value as R2(56 ohms). Why not just use another 56 ohm resistor for R1 and call it a day if that's the case?

keantoken · 25th October 2015, 04:52 AM

If you don't have a THD meter, R1=R2 is probably the best you can do, don't worry about it. Those who can test THD down to 0.0001% can find the best value for R1 however.

ammel68 · 25th October 2015, 06:32 PM

OK, thank you for the reply.

Project16 · 1st November 2015, 12:20 PM

Hello everyone!
I finished setting Package Kuarlotron.
Keantoken thank you again because the sound is really beautiful!

jls001 · 1st November 2015, 02:15 PM

Quote:

Originally Posted by Project16

I finished setting Package Kuarlotron.

Looking good!!!

jls001 · 1st November 2015, 02:33 PM

Mine is also shaping up

Project16 · 1st November 2015, 02:57 PM

Quote:

Originally Posted by jls001

Mine is also shaping up

Yes I followed the thread on "HifiVision" and I find this really beautiful card.

thimios · 1st November 2015, 03:59 PM

Quote:

Originally Posted by Project16

Hello everyone!
I finished setting Package Kuarlotron.
Keantoken thank you again because the sound is really beautiful!

Nice work!
Can you share the pcb and schematic for psu?
Can you share the pcb for buffer?

25th October 2015, 04:08 AM	#512
keantoken diyAudio Member Join Date: Aug 2006 Location: Texas	Have you looked at the schematic in the link in my signature? __________________ The Kmultiplier rail filter! -=- The Simple Kuartlotron Superbuffer! Need something built, repaired or modded? PM me and ask what I can do!

25th October 2015, 04:40 AM	#513
ammel68 Banned Join Date: Sep 2009 Location: Southeast, U.S.	Yes I have, but I still don't understand how to adjust R1. Edit--I reread the trimming part again on your site. Is R1 for adjusting for lowest THD only? Above that it states 2:"R1=R2". That would indicate to me to adjust it to the same value as R2(56 ohms). Why not just use another 56 ohm resistor for R1 and call it a day if that's the case? Last edited by ammel68; 25th October 2015 at 04:48 AM.

25th October 2015, 04:52 AM	#514
keantoken diyAudio Member Join Date: Aug 2006 Location: Texas	If you don't have a THD meter, R1=R2 is probably the best you can do, don't worry about it. Those who can test THD down to 0.0001% can find the best value for R1 however. __________________ 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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25th October 2015, 04:05 AM	#511
ammel68 Banned Join Date: Sep 2009 Location: Southeast, U.S.	I'm sure this has probably been covered somewhere, but I can't find the answer(s). I'm trying to understand how to adjust the 3 trimmer pots. R5(5K ohms)--adjust until you read 5V at TP? R9(1M ohms)--adjust for lowest offset at the output? Is this done with the input shorted or does it matter? R1(100 ohms)--how do you adjust this trimmer? Thank you!

25th October 2015, 06:32 PM	#515
ammel68 Banned Join Date: Sep 2009 Location: Southeast, U.S.	OK, thank you for the reply.

1st November 2015, 02:33 PM	#518
jls001 diyAudio Member Join Date: Jan 2012 Location: Mumbai	Mine is also shaping up