Super Low Distortion Ultra Pure Audio Oscillators Revisited

Where we discuss new analog design ideas for Pro Audio and modern spins on vintage ones.
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mediatechnology
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Re: Super Low Distortion Ultra Pure Audio Oscillators Revisited

Post by mediatechnology » Thu Apr 29, 2021 8:15 am

Since the point in time I committed to laying out ULDO and Nacho I think I've built about 17 boards for customers.
This week was no exception and I'm thankful for the orders and the break from doing the layout.
ULDO is basically finished and as you can see a lot of work needs to be done on Nacho.
I'm not sure the line of demarcation between ULDO and Nacho will be on the final layout - I drew it in for dramatic effect.

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ULDO-Nacho Layout Work In Progress

ULDO's schematic looks like a giant hairball with the THAT340's transistors hanging off the op amp but it laid out pretty well.
I mirror-imaged one THAT340 which is also symmetrical around the 5532.
Those big honkin' radial electrolytics are the differential bypass for the 5532.
They serve not so much to bypass the 5532 but to isolate its supply currents, when driving balanced loads, from the ±15V rails.
The return current for single-ended loads is a "home run" all the way back to the DC 0V connector.
https://ka-electronics.com

“Diet, injections, and injunctions will combine, from a very early age, to produce the sort of character and the sort of beliefs that the authorities consider desirable, and any serious criticism of the powers that be will become psychologically impossible.” – The Impact of Science on Society (1953) by Bertrand Russell, p.50

Dr. Sherri Tenpenny Exposes 10 Deadly Dangers of Pzifer/Johnson & Johnson Covid-19 Vaccines: "This is a well-designed killing tool." https://waynekirkwood.com/content/Docto ... accine.mp4
Plandemic Series: "Pland3mic - Indoctornation" https://waynekirkwood.com/content/Pland ... nation.mp4
Plandemic Series: "Plandemic - Doctors In Black" https://waynekirkwood.com/content/Plandemic.mp4

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mediatechnology
Posts: 4667
Joined: Sat Aug 11, 2007 2:34 pm
Location: Oak Cliff, Texas
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Re: Super Low Distortion Ultra Pure Audio Oscillators Revisited

Post by mediatechnology » Tue May 04, 2021 3:32 pm

I'm still triple and quadruple-checking the layout but it looks like I'll be submitting a small board order in the next day or so.

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Looking forward to getting that Protoboard back...
https://ka-electronics.com

“Diet, injections, and injunctions will combine, from a very early age, to produce the sort of character and the sort of beliefs that the authorities consider desirable, and any serious criticism of the powers that be will become psychologically impossible.” – The Impact of Science on Society (1953) by Bertrand Russell, p.50

Dr. Sherri Tenpenny Exposes 10 Deadly Dangers of Pzifer/Johnson & Johnson Covid-19 Vaccines: "This is a well-designed killing tool." https://waynekirkwood.com/content/Docto ... accine.mp4
Plandemic Series: "Pland3mic - Indoctornation" https://waynekirkwood.com/content/Pland ... nation.mp4
Plandemic Series: "Plandemic - Doctors In Black" https://waynekirkwood.com/content/Plandemic.mp4

User avatar
mediatechnology
Posts: 4667
Joined: Sat Aug 11, 2007 2:34 pm
Location: Oak Cliff, Texas
Contact:

Re: Super Low Distortion Ultra Pure Audio Oscillators Revisited

Post by mediatechnology » Wed May 05, 2021 10:10 am

I've got a prototype run of boards on order so in a week or so we'll see if this dog hunts.
https://ka-electronics.com

“Diet, injections, and injunctions will combine, from a very early age, to produce the sort of character and the sort of beliefs that the authorities consider desirable, and any serious criticism of the powers that be will become psychologically impossible.” – The Impact of Science on Society (1953) by Bertrand Russell, p.50

Dr. Sherri Tenpenny Exposes 10 Deadly Dangers of Pzifer/Johnson & Johnson Covid-19 Vaccines: "This is a well-designed killing tool." https://waynekirkwood.com/content/Docto ... accine.mp4
Plandemic Series: "Pland3mic - Indoctornation" https://waynekirkwood.com/content/Pland ... nation.mp4
Plandemic Series: "Plandemic - Doctors In Black" https://waynekirkwood.com/content/Plandemic.mp4

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