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Old 3rd November 2012, 09:01 PM   #121
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Default Juan is working to produce the layout

Dx MKII Super A work in progress - YouTube

regards,

Carlos
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 3rd November 2012, 09:31 PM   #122
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video removed by author
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Old 4th November 2012, 03:54 AM   #123
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Default Yes...he did that... i have asked him not to delete videos

He already knows this is not a good practice.

Sorry.

Carlos
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 4th November 2012, 06:55 AM   #124
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Default I have posted without tell Juan...he had not the knowledge the video was posted

So, he is not guilty... i am the guilty one.

To compensate you, dear friend, because video missed, i am posting another one, more modern, and about the same subject.

Board layout evaluation made to dear Juan Vargas. - YouTube

regards,

Carlos
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 4th November 2012, 10:27 AM   #125
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Do not worry so much, Uncle Carlos ... It was just curiosity, and you are not to blame (not the DX). grateful
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Old 4th November 2012, 10:39 AM   #126
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Default Is 1 watt good enough.... what about Super A?.... can i use it in Class AB?

This video discusses the subject and show some simple tests.

It is uploading right now... soon it will be available:

http://youtu.be/qYtpGbiMkV

regards,

Carlos
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 4th November 2012, 11:48 AM   #127
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Default This other link may work better

last link had a failure:

Is 1W in pure class A too low power - YouTube

regards,

Carlos
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 4th November 2012, 07:24 PM   #128
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Default Modifications to reduce, even more, the third harmonic

Here you have it.

It is playing...my God!

regards,

Carlos
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File Type: jpg Mods to reduce even more third harmonic.jpg (89.1 KB, 439 views)
Attached Files
File Type: pdf Dx Super A - MKII - Extracting .pdf (56.2 KB, 139 views)
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 4th November 2012, 07:57 PM   #129
winslow is offline winslow  United States
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Looks like a great amp to build for us car audio people...class a at normal listening and a/b when we need to get down to business. And a blameless design on top of that.

I need to find some existing amps that I can use for their power supplies and heatsinks so I can put some of these into my car.
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Old 5th November 2012, 07:05 AM   #130
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Default It is already a hell hot...i do not think it can be good for a car

But you can adjust it class AB...and then you can put it inside your car..unless you are in frozzen Artic or Antartida.

I am celebrating...drinking a herb we have here... alike a tea..but it is green, smashed and mixed with boiling water...we call "chimarrão".

regards,

Carlos
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File Type: jpg gaucho_mate.jpg (54.6 KB, 400 views)
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