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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)

BRN 9th June 2017 11:10 PM

Keantoken,

Thanks. Your right. I need to get my eyes checked.

Brad

BRN 12th June 2017 12:18 AM

On the trimmer resistors should I take measurements from pins 1 and 2, or 2 and 3?

Thanks for the help,
Brad

keantoken 12th June 2017 12:39 AM

1 and 2.

BRN 3rd August 2017 05:33 PM

2 Attachment(s)
I finally put together my second Kuartlotron superbuffer. I had some builder issue on the first buffer that finally got resolved. I triple checked everything on this build before soldering parts in. I did sell the first buffer, but regretted it and had to build this one.

This build used the second version of the PCBs which have the shuntregs. I did not use the on the onboard shuntregs, but instead used two of RJM's S-regs, one for each channel. It was probably over kill, but that's okay. The S-regs are nice boards that fit the bill for this build. I also used a 50K eBay DACT and a 3 position 4 pole Grayhill switch.

The final result is a very nice sounding preamp with great imaging that works very well with my Folsom amp.

keantoken 3rd August 2017 09:01 PM

Looks nice!

Destroyer OS 3rd August 2017 10:18 PM

Very nice!

hkknudsen 22nd November 2017 12:08 PM

Hi all, I'm planning to buy some lifepo4 batteries for my newly bought Kuartlotron. Any opinion on whether I should go for slightly above the recommended dual 10V, or below? Since they will drift we're maybe talking up to 1V above or below. Thanks for any input

acass 23rd November 2017 05:26 AM

Hi, I have a question about switch type and contact material.

I want to build a Kuartlotron with a selector switch in it. 2 in 1 out, what switch, toggle or rotary and what should the contact be, gold, silver or ???.

Thanks in advance, more questions to follow.

Alan.

keantoken 24th November 2017 05:47 AM

Quote:

Originally Posted by hkknudsen (https://www.diyaudio.com/forums/analog-line-level/251413-kuartlotron-keantokens-simple-error-correction-superbuffer-post5252438.html#post5252438)
Hi all, I'm planning to buy some lifepo4 batteries for my newly bought Kuartlotron. Any opinion on whether I should go for slightly above the recommended dual 10V, or below? Since they will drift we're maybe talking up to 1V above or below. Thanks for any input

I would say go slightly above.

keantoken 24th November 2017 05:55 AM

Quote:

Originally Posted by acass (https://www.diyaudio.com/forums/analog-line-level/251413-kuartlotron-keantokens-simple-error-correction-superbuffer-post5253260.html#post5253260)
Hi, I have a question about switch type and contact material.

I want to build a Kuartlotron with a selector switch in it. 2 in 1 out, what switch, toggle or rotary and what should the contact be, gold, silver or ???.

Thanks in advance, more questions to follow.

Alan.

I suggest a 3-pole switch so you can switch ground along with R and L, therefore keeping the source grounds separate. Other than that, I have no experience with what switches work best. However I think any switch that is not known for problems will get you 99% of the way there.


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