DIY aleph 4 with reduce o/p

classalpha · 16th January 2007, 12:11 AM

Thank you Mr Nelson for sharing you design.
I had chosen this amp as it meets my power supply requirement. However the output Fet were reduced to 3set/channel.

i tested every output stage, one at a time before paralleling them together. And it works the first time every time.

AS for the sound...... wonderful!!!!!!!!!!
But now my weakest link is my audioNote preAmp kit. Therefore i am now planning to build a P1.7 without the balance input.

here are some pic of work-in-progress.

classalpha · 16th January 2007, 12:13 AM

pic 2

classalpha · 16th January 2007, 12:14 AM

Finished at last!!!!!

rchua77 · 16th January 2007, 01:58 AM

i think the casing looks absolutely fantastic!

The heatsinks look like they're from KaiChin?
How did you fabricate the casing? Were they custom made or DIYed in the backyard?

What is the voltage drop across the source resistors? What values of resistors did you use?

Regards

moe29 · 16th January 2007, 02:59 AM

Your amp looks like a monster, like all good Alephs do

It's always interesting to see the end result of hard work.

classalpha · 17th January 2007, 06:12 AM

thanks for the comment

i do not have a backyard, but i do have a workshop in my office.

i brought raw alu and did the mechining in the workshop.
All the parts i used were normal/cheap parts, execpt for the E-cap and transformer.

Even the heatsinks were used want. only S$10/pc.

rchua77 · 17th January 2007, 06:46 AM

Can you drop me a quick email where you got the heatsinks?

thanks in advance

classalpha · 17th January 2007, 07:51 AM

errrrr........
your email are set to 'do not distrub'

anyway, i brought those at SLT third floor. a shop that speclise in "junk". Forget the name/unit no.

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16th January 2007, 01:58 AM	#4
rchua77 diyAudio Member Join Date: Jul 2003 Location: Back in Singapore	i think the casing looks absolutely fantastic! The heatsinks look like they're from KaiChin? How did you fabricate the casing? Were they custom made or DIYed in the backyard? What is the voltage drop across the source resistors? What values of resistors did you use? Regards

16th January 2007, 02:59 AM	#5
moe29 diyAudio Member Join Date: Dec 2002 Location: Florida	Your amp looks like a monster, like all good Alephs do It's always interesting to see the end result of hard work.

17th January 2007, 06:12 AM	#6
classalpha diyAudio Member Join Date: May 2006	thanks for the comment i do not have a backyard, but i do have a workshop in my office. i brought raw alu and did the mechining in the workshop. All the parts i used were normal/cheap parts, execpt for the E-cap and transformer. Even the heatsinks were used want. only S$10/pc.

17th January 2007, 06:46 AM	#7
rchua77 diyAudio Member Join Date: Jul 2003 Location: Back in Singapore	Can you drop me a quick email where you got the heatsinks? thanks in advance

17th January 2007, 07:51 AM	#8
classalpha diyAudio Member Join Date: May 2006	errrrr........ your email are set to 'do not distrub' anyway, i brought those at SLT third floor. a shop that speclise in "junk". Forget the name/unit no.