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Old 16th January 2011, 10:09 PM   #521
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by bobodioulasso View Post
Very nice!

Aren't those heatsinks intended for air forced kooling?
actiually, I think they are optimal convection type
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Old 17th January 2011, 06:13 AM   #522
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Never tried but enourmous dissipation capability with silent squirrel's cage fans.
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Old 17th January 2011, 08:47 PM   #523
Bakmeel is offline Bakmeel  Netherlands
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Can't stay behind on this thread...

This is my Aleph 2, finished in summer 2009 after a 5-year build.
Build Thread HERE.

Thanks Nelson! They sound great!
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Old 17th January 2011, 09:14 PM   #524
Marra is offline Marra  United Kingdom
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Quote:
Originally Posted by Bakmeel View Post
Can't stay behind on this thread...

This is my Aleph 2, finished in summer 2009 after a 5-year build.
Build Thread HERE.

Thanks Nelson! They sound great!
Wow; such skill!!
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Old 17th January 2011, 09:18 PM   #525
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Quote:
Originally Posted by bobodioulasso View Post
Never tried but enourmous dissipation capability with silent squirrel's cage fans.
This is the thermal resistance of the heatsink for 5 m/s (!) airflow: 0.035 K/W.
With 1 m/s airflow, which is more realistic to tolerate in a living room situation I would expect 0.07 K/W
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Old 17th January 2011, 09:22 PM   #526
ra7 is offline ra7  United States
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Thats got to go in PassDIY hall of fame!
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Old 21st January 2011, 02:09 AM   #527
6L6 is offline 6L6  United States
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My B1 -

Click the image to open in full size.

Click the image to open in full size.

Lots more info and photos here -- B1 preamp build thread
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Old 25th January 2011, 11:44 PM   #528
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Thumbs up Schematics????...Build sheet?????

Quote:
Originally Posted by Bakmeel View Post
Can't stay behind on this thread...

This is my Aleph 2, finished in summer 2009 after a 5-year build.
Build Thread HERE.

Thanks Nelson! They sound great!

That is some fine skill!
I am so jellous
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Old 30th January 2011, 02:12 AM   #529
a.wayne is offline a.wayne  United States
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Quote:
Originally Posted by bobodioulasso View Post
Heat issue too.
Of course the bass amp have to meet the requirements, but classA is a waste of money and energy.
Just my opinion.
Quote:
Originally Posted by regiregi22 View Post
So you confirm that it is, in fact, just an economy issue.

Congratulations Bill, your's is one of the most sexy F5 amps that has appeared around here...IMHO
Maybe on the F5 it works better for it to be in Class-a, from experience with other amplifiers, this is not the case and full class-a tend not to have the life exhibited by a good a/ab amplifier. class-A can be smooth, but dead by comparison.
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Old 30th January 2011, 07:35 AM   #530
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Now it is really finish. The first amp the even my wife can use :-)

(well, it is solidly connected to a DAC with output caps and delay circuit, so no issues, at least on the input)

I think I will drill some holes in the shape of F5 on the top for ventilation. Now is kind of sealed, although the temperature inside is around 50 C.

I also think I will have to put a bumper on the edges, if I do not want my son to have the heatsink imprinted in his forehead sooner or later :-) (But this would be temporary)

D.
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