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Old 20th December 2009, 05:41 PM   #1
adusson is offline adusson  Finland
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Default Aleph 1,5 ?

I have built two monoblocks wich is something between Aleph2 and 1,2.
Works really great and sounds wery good.
Each monoblock uses 600W continosly(2,62A 230V), rail is +-51V, so the get really hot!
Capasistors are Rifa 4x100 000uF and 18pcs. irfp 240 in each amp, trafos are an 11kg 800VA Toroid.
Here is what they look like:
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Old 20th December 2009, 05:47 PM   #2
valo is offline valo  Norway
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nice work, have you measured the temperature?, I measure about 70 degrees on the transistors on my diy Aleph 5
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Old 20th December 2009, 05:51 PM   #3
jleaman is offline jleaman  Belgium
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monsters!
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Old 20th December 2009, 05:53 PM   #4
Zen Mod is offline Zen Mod  Serbia
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very nice - but you need at least another one 800VA Donut per monoblock ;

800VA is too small for 600VA consumtion
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Old 20th December 2009, 06:13 PM   #5
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Congratulations,
I like your "monsters" very much, and your Triumph ST too!

(even if it is not a Monster!) : D

Marcello
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Old 20th December 2009, 06:14 PM   #6
adusson is offline adusson  Finland
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Ok, but I think these trafos does the job anyway, here is a link for some more info about the transformers...

https://www1.elfa.se/data1/wwwroot/w...A/05613997.pdf
and
Toroidal core transformer for audio amplifiers 800 VA - ELFA tehnikapood

I have compared with other transformers wich i 1000VA an the weight i only around 7kg, mine is 11kg...
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Old 20th December 2009, 06:26 PM   #7
Gyuri is offline Gyuri  Hungary
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Very good implementation. I like it because of that Aleph configuration, because ( availing itself of a computer technology terminology) can be scalable configuration.
I mean you build the size that your cooling flange and your power-supply unit allow out of it. Fundamentally sure money question.

It's mine:
My good old-new Aleph

Gyuri
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Old 20th December 2009, 06:46 PM   #8
adusson is offline adusson  Finland
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Quote:
Originally Posted by Gyuri View Post
Very good implementation. I like it because of that Aleph configuration, because ( availing itself of a computer technology terminology) can be scalable configuration.
I mean you build the size that your cooling flange and your power-supply unit allow out of it. Fundamentally sure money question.

It's mine:
My good old-new Aleph

Gyuri


Thank you for your reply, your amps could almost drive a nuclearplant...
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Old 20th December 2009, 07:30 PM   #9
osscar is offline osscar  Latvia
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Yes, these are very good transformers, silent as the tomb, and no vibration. It was quite expensive ...

Your amps is also perfect. I also thought about building a new amplifier just can not decide BA-1 or Aleph
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Old 20th December 2009, 07:39 PM   #10
Zen Mod is offline Zen Mod  Serbia
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