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Old 2nd July 2008, 02:24 AM   #1
diyAudio Member
 
Join Date: Mar 2008
Default just made Aleph-3,

Hi,


This is my first class A amp i ever build. so pls try to understand this.


i just made Aleph-3. now time to assemble it properly. showing my msy table...ha...

i had used other mthod to bring down temp. first i used huge heat sink, put 6 mosfets each. also attached thick copper plate at the join to have low resistence. also it is working very well for mosfest internal tharmal to be lower. i touched on the mosfest after svrl hrs, it is slightly worm but not hoot at all...i believe this way the mosfest life will be much more longer. i also used fan to cooling down the copper plate and heat sink...this way my temp only stay on arround 40 to 42c....at my 32 deg amb temp (today rate).

amp is working very very well. i am now thinking to assemble it properly. i am still operating it for checking if there is any problem arise.

i have question about GND connection. i made star GND.

is it all this will go to star GND indivisualy?
R101, R106, R137






if you have any cooments on it pls write. thanks for help.

michael
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Old 2nd July 2008, 02:30 AM   #2
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Join Date: Mar 2008
Default here is the circuit design

hi,

here is the circuit design.

thank you
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Old 27th July 2008, 01:12 PM   #3
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Join Date: Mar 2008
Default finally assembled aleph-3

hi,

i just assembled aleph-3- 30w onto the heat sink and tested good sound quality.

now i have set to 45wrms into 8ohms. can i add more mosfets at output for this circuit to have 60w or more?

Here is the picture. hope for comments.

fully hand made.

best regards
michael
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Old 27th July 2008, 01:38 PM   #4
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Join Date: Nov 2005
Location: Québec
Great for you !

If you want to clean this wiring you should check the site of BrianGT, he made some very nice PCB for Aleph Mini & 30.

Have fun !
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