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Stefanoo 21st February 2007 08:45 AM

pre amplifier aleph L or P
i'm getting a little confused by searching on the forum.....

I would like to build one of the Nelson's aleph L or P.

I 've read that nelson says that the L version is better

Could anybody redirect to a post that develop this project from the schematic till the pcb passing through any possible issues with the mounting..hum...oscillation...and so on?

i have been searching ...but i could find just fragmented threads.
For instance i got a schematic....but it's not clear and it's not possible to read the value of the components.

Is there anybody that can help me with this?

Should i start a new 3d with aleph L let's build it !?

hope to receive good advice.

Best Regards,

Stefanoo 21st February 2007 10:57 AM

i have to correct myself...

nelson was referring at the 2 different versions of the L model.
It seems that he considers the P version better....isn't it?

h_a 21st February 2007 11:44 AM

Why don't you look into the wiki? At least there's an article about the Aleph L that also explains the differences between the 2 versions. PCBs are also there.

For the link please see my signature!

Enjoy! Hannes

PS: wether the balanced P or the unbalanced L is better you must decide for yourself.

Stefanoo 21st February 2007 12:45 PM

yes...i already have checked that out.
The schematic is not very clear: it's not possible to read nthe value of the components and the labels.

Since my source in single ended, i would go for an unbalanced version.

If somebody has a clearer schematic for aleph L pre than that one linked on wiki's webside.

What i was wondering was...if the aleph P preamplifier is bettere quality than the aleph L ...

h_a 21st February 2007 12:53 PM

Personally I don't see too much benefit in using a balanced preamp with unbalanced sources. But honestly I really like the simplicity of the L 1.2.

Far more people have built the P though.

Cheers, Hannes

zygibajt 21st February 2007 01:11 PM

> Stefanoo

You might find these two threads interesting:


Stefanoo 21st February 2007 01:23 PM

thanks for the link, it was usefull....

and so...going a long with that..... i would like to build aleph P.

Could you help me,please?

May you give met he schematic and the layout, if possible?

i would be thainkfull for this.


P.S. by the way compliment for the good job with the preamplifier.

Stefanoo 21st February 2007 01:50 PM

i found this schematic for the aleph p

but on the circuit i don't see the volume control section.

Is this the complete schematic?

In case, how can i transform it in single ended input-output? (since i would connect it to a single end source and power amp)

h_a 21st February 2007 02:36 PM

It's not a good idea to post Kristijan's link here, since - correct me if I'm wrong - he was banned from this forum because of making money with Nelson's designs (as far as I know he sells pcbs with benefit).

Cheers, Hannes

Stefanoo 21st February 2007 02:40 PM

well i didn't know that of course!!!!

that's preatty sad thought!!!...i will delete it...

can anybody help me to find the service manual for the aleph p 1.7 and L?

The aleph's P service manual 's link is not available anymore on the link that i have visited up till now....

hope somebody can forward those infomration to me too....

thanks in advance!


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