Twisted Sibling - THS4131 based preamp/buffer/SE-BAL converter - Page 3 - diyAudio
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Old 31st May 2006, 10:01 PM   #21
bravi is offline bravi  New Zealand
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Default PDF of PCB

Russ,

WHen do you plan to offer PCB of this circuit for sale
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Old 31st May 2006, 10:44 PM   #22
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Default Re: PDF of PCB

Quote:
Originally posted by bravi
Russ,

When do you plan to offer PCB of this circuit for sale

For those of you who want them we can get some soon, probably in the next month. Just drop me an email or something so I can get an idea how many to order.

Cheers!
Russ
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Old 1st June 2006, 10:23 AM   #23
st2_998 is offline st2_998  Italy
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Ross, in your opinion does it make sense to use this circuit for a buffer with both input and output unbalanced? (I yet don't understand if it makes sense for X-BOSOZ too...)
Will it be stable at unity gain?
In order to use it with OPA1632 something should be added perhaps ("control for common mode offset" Mr. Pass said)?
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Old 1st June 2006, 11:20 AM   #24
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Quote:
Originally posted by st2_998
Ross, in your opinion does it make sense to use this circuit for a buffer with both input and output unbalanced? (I yet don't understand if it makes sense for X-BOSOZ too...)
Will it be stable at unity gain?
In order to use it with OPA1632 something should be added perhaps ("control for common mode offset" Mr. Pass said)?

It would work SE-IN/SE-OUT but it might be a waste since you would not get much benefit from the chip. If you want an SE buffer I would look at something like the "Kookoo" which I design specifically as an SE linestage/buffer for the Joshua Tree (it is designed to stack).

I believe OPA1632 should work just fine without any circuit modifications. You just may need to play with the resistor values a little. I will have to dig into the datasheet and see if I can find any clear changes to make.

Cheers!
Russ
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Old 1st June 2006, 03:42 PM   #25
steenoe is offline steenoe  Denmark
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Russ, I have to repeat the question: Do you ever sleep?
I am wondering if this circuit sounds as good as a purebreed Twisted BosoZ?? If this was not in the middle of the fishing season, I would build one right away Very good work, and very kind of you to share the pdf's If you continue like this, you might start the whole tube/solid-state discussion all over again Just with X'ed chips and mosfets as subjects

Steen
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Old 1st June 2006, 06:29 PM   #26
Nisbeth is offline Nisbeth  Denmark
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Russ, any chance you could share the eagle .lbr for the THS4131?


/U.
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Old 2nd June 2006, 03:49 PM   #27
st2_998 is offline st2_998  Italy
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Default Kookoo

Sorry Russ, I guess I'm OT here, but I couldn't find any schematics of Kookoo (if any had been posted), and couldn't find anything on Twisted Pear either. Can you help me?

NB: "Stacking" on JT sounds very interesting to me.
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Old 2nd June 2006, 04:09 PM   #28
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Hi Guys,

As to the library I will share it here shortly.

Here is the link to the KooKoo:

http://www.diyaudio.com/forums/showt...534#post901534

It is also designed to stack with the JT.
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Old 2nd June 2006, 09:10 PM   #29
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sorry had nothing to do (waiting for a taxi )

Russ, damn.. you know the word vacation?
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Old 16th June 2006, 11:37 AM   #30
Blimp is offline Blimp  Netherlands
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Hey Russ,

Excellent, I was looking like this for a while to feed mine UcD's.
Just curious, does the Joshua Tree comes at the input or the output of the Sibling?

Do you have an estimate for the costs?

Gr, Bastiaan
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