my finished version of the Aleph P

Stefanoo · 5th May 2008, 09:12 PM

i wanted to share some pictures with you guys of my Aleph P.
Sounds is nice.
Performances of the circuit are very good.
Matching of the semiconductors within 5mV.
it's a two separate units preamplifier: PSU + line stage

It wasn't very easy to put all the parts together...but here it is...

an overall view of the outside.

Stefanoo · 5th May 2008, 09:13 PM

a shoot of the power supply before it was wired up

Stefanoo · 5th May 2008, 09:15 PM

an inside view of the two boards and the stepped attenuator inside the metal case.
I had to re-do the attenuator because i wasn't satisfied with the values i had first chosen and the quality of the resistors used...

Stefanoo · 5th May 2008, 09:19 PM

a view of the finished attenuator

Stefanoo · 5th May 2008, 09:20 PM

and a last picture with the view of the rear panel

metalman · 5th May 2008, 09:39 PM

Absolutely gorgeous!

The attenuator in particular is a work of art. Congratulations.

analog_sa · 5th May 2008, 09:54 PM

Quote:

Originally posted by Stefanoo
Sounds is nice.

Looks very nice too. It will be easy to convert it to P1.0 once you get tired with the sound

Dennis Hui · 5th May 2008, 11:24 PM

Stefanoo,

Very beautifully done! Such elegant simplicity.

May I ask what is the source of the cases you used?

Cheers,
Dennis

Stefanoo · 6th May 2008, 06:44 AM

Thanks a lot guys.

this is the website (English version)

http://www.hifi2000.it/default.asp?Langid=1

it's a nice factory here in Italy and they have very nice stuff.
Prices are good!
Obviously i think shipping outside of Italy wouldn't make it as convenient as it is for somebody here.

Stefanoo · 6th May 2008, 08:32 PM

Here some shots of the output at the oscilloscope.

the first picture is the upper bandwidth limit at -3dB (300KHz!!!)

6th May 2008, 06:44 AM	#9
Stefanoo diyAudio Member Join Date: Apr 2006 Location: italia - ora USA -WI	Thanks a lot guys. this is the website (English version) http://www.hifi2000.it/default.asp?Langid=1 it's a nice factory here in Italy and they have very nice stuff. Prices are good! Obviously i think shipping outside of Italy wouldn't make it as convenient as it is for somebody here. __________________ Stefano

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5th May 2008, 09:39 PM	#6
metalman diyAudio Member Join Date: Jun 2003 Location: Calgary, Alberta	Absolutely gorgeous! The attenuator in particular is a work of art. Congratulations.

5th May 2008, 11:24 PM	#8
Dennis Hui diyAudio Member Join Date: Aug 2002 Location: Toronto, Canada	Stefanoo, Very beautifully done! Such elegant simplicity. May I ask what is the source of the cases you used? Cheers, Dennis

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