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Old 16th July 2012, 07:10 PM   #6731
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Citroen 2CV-based Africar
https://www.youtube.com/watch?v=LGR0hmj2vwY

This version could go where many 4 x 4 's couldn't . Like an SE tube amp it can do the impossible . The guy was no businessman alas ( they exist in our industry of the exact same type ) .The design worked very well .

C D you are right .
http://www.dastank.com/VW-Volkswagen-1932-1960

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Old 16th July 2012, 08:18 PM   #6732
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Two Wild Horses - The Citroen 2CV Website - 2CV Sahara

Cats Citron Net 2cv Sahara History
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Old 16th July 2012, 08:26 PM   #6733
a.wayne is offline a.wayne  United States
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Personally, i'd favour a pre-ww2 Lagonda Rapid and drive around, pretending i'm uncle oswald.
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Originally Posted by Wavebourn View Post
Quad-405 works with zero bias in output stage that works in class C. What draws the idle current, class A driver.

It is class A+C amp. On "first watt" current to the load is supplied by driver, when voltage drop on resistor from the driver output to the load (effectively between bases and emitters of output transistors) is enough to open an output transistor it starts assisting. I did similar trick in late 1970'th, but I used faster opamp and nested feedbacks, so did not need that "bridge" that Walker used for balance between fast and slow components of his amp.
Nested vs current feedback ..... ?
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Old 16th July 2012, 08:35 PM   #6734
popilin is offline popilin  Argentina
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Talk:CitroŽn 2CV - Wikipedia, the free encyclopedia
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Old 16th July 2012, 08:52 PM   #6735
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Quote:
Originally Posted by a.wayne View Post
Nested vs current feedback ..... ?
Where did you find current feedback?
Ploease don't confuse. All feedbacks there are by voltage. I used feedbacks by voltage as well.
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Old 16th July 2012, 09:51 PM   #6736
a.wayne is offline a.wayne  United States
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Yes current feedback .....!

http://www.intersil.com/content/dam/...n94/an9420.pdf
https://www.national.com/an/AN/AN-597.pdf
Current-feedback operational amplifier - Wikipedia, the free encyclopedia


vs nested .... ?
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Old 16th July 2012, 10:12 PM   #6737
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My nested feedback is perpendicularly to that "current feedback definition".

Ugly term.

If feedback current, or voltage, is proportional to output voltage it is feedback by voltage. If it is proportional to output current it is feedback by current

If you insist on your question, "Current vs nested", please answer before, "Which bear do you like more, black vs in a glass bottle"?
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Old 16th July 2012, 10:48 PM   #6738
a.wayne is offline a.wayne  United States
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I'm asking which is better , nested feedback (voltage) or Current feedback. Feedback by current would seem to be more accurate and analogous to amp operation (SS) voltage more for tube amps ... NO ..?

For the record, I prefer my "Beer" black and in a glass ....
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Old 16th July 2012, 10:48 PM   #6739
SY is offline SY  United States
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Guys, keep Car Talk in the Car Talk thread, please.
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Old 16th July 2012, 10:57 PM   #6740
a.wayne is offline a.wayne  United States
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Sy,

Current feedback , likey ...?
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