my finished version of the Aleph P

[Stefanoo]

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]

a shoot of the power supply before it was wired up

 

[Stefanoo]

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]

a view of the finished attenuator

 

[Stefanoo]

and a last picture with the view of the rear panel

 

[metalman]

Absolutely gorgeous!

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

 

[analog_sa]

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]

Stefanoo,

Very beautifully done! Such elegant simplicity.

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

Cheers,
Dennis

 

[Stefanoo]

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]

Here some shots of the output at the oscilloscope.

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

 

[Stefanoo]

the second is the square wave at 10KHz

 

[Stefanoo]

...at 50KHz....still a pretty nice square...

 

[Stefanoo]

and last...at 100KHz....the square is definitely rounded down...

 

[cyclotronguy]

And capacitors by North Creek Music Systems.... very nice

Cyclotronguy