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Old 17th May 2002, 09:40 PM   #1
dorkus is offline dorkus  United States
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Default Son of Dork: Active Circuitry

The Son of Dork (SOD) project is the result of the diyAudio.com multi-channel preamp initiative (The diyAudio.com preamp project!). The project has been split into threads dedicated to discussion of the preamp's different functional units:

- General Discussion (project status, functional requirements)
- Active Circuitry
- Attenuator
- Power Supply
- Connections and Layout (including input switching)
- Chassis and Construction
- Hardware Logic, Controls, Display
- Microprocessor (programming, implementation)

I will be managing the project as a whole, as well as initially overseeing individual threads. For a background on the project, please see the original thread referenced above. A website dedicated to the project will be located at http://dorkus.org/diy/sod.

Let the fun begin!
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Old 17th May 2002, 10:35 PM   #2
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Question Borbely superbuffer

Hello guys,

I am an absolute beginner in DIY audio, but since there's a lot about Borbely, what do you think of his superbuffer in

http://www.borbelyaudio.com/borb502.pdf[/URL]
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Old 17th May 2002, 10:40 PM   #3
dorkus is offline dorkus  United States
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the borberly DC-coupled FET line amp we were talking about (the one the single-ended guys didn't like ) is actually a tweaked-out version of the super buffer. the line amp includes source followers for additional output drive capability, and a servo for better DC stability. i suspect it sounds pretty good but i've never tried it, i'm probably going to try the full line amp version. check out the article on the borberly site on the all-FET line amp, from the 5/02 issue of AudioXPress, it mentions the super buffer.
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Old 18th May 2002, 12:06 AM   #4
rickpt is offline rickpt  Portugal
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all cascode.....
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Old 18th May 2002, 12:19 AM   #5
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Question Borbely line stage

Isn't that the same 12 year old circuit that HPotter posted in the previous thread on this topic?

H.H.
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Old 18th May 2002, 12:26 AM   #6
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I guess so. That circuit is 10 years old and looks better to me.
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Old 18th May 2002, 12:37 AM   #7
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Default Line stage

Not yet ready.......
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Old 18th May 2002, 12:50 AM   #8
rickpt is offline rickpt  Portugal
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no
this is the all cascode, it has cascodes in the folower stage.

as for the older one posted on the other thread, i dont like the way borbely bias the front stage cascode. wath do you guys think about that?

regrads

rick
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Old 18th May 2002, 01:01 AM   #9
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older one....
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Old 18th May 2002, 02:41 AM   #10
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Red face i dont like the way borbely bias the front stage cascode

Stranger..... we don't discuss cascodes in front of the children and women folks 'round here. You take that kinda talk elsewhere......

H.H.
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