Aleph 30 Schematic Help - Nodes

[ChrisV]

Hi All,

I have created a pc-board layout of the Aleph 30. The layout assumes that I have decoded the schematic correctly!

If you have a spare moment, I will appreciate you looking at my schematic, to see whether it is accurate. I am not completly sure where some nodes should be, and where not.

An image of my schematic is here:
http://www.owf.co.za/chris/pass_labs_stuff.htm

There is also an image of my pc board layout.

Thanks,
Chris

 

[ergo]

hmmm

I can't see that you input dif. stage drives anything....... The signal doesn't go anywhere from between Q1 and R14

Ergo

 

[ChrisV]

Ah so...

Hi ergo,

I must be low on sleep! I fixed the schematic.

Thanks.
Chris

 

[leroy]

Nice job ChrisV!

Creating some extra space for the heatsinks was indeed necessary since I also struggled with Mark's original Aleph 4 board.

Please show us some pictures when you've finished your creation.

Leroy

 

[Koy]

I build it.I am not satisfied with sound.It is interesting. Changing the feedback resistors (R3,R7) changes the sound.It has more mids and whole sound is not so "slim".

 

[Samuel Jayaraj]

Nice layout for the Aleph front-end. However, attaching the back-end/output devices via hook-up wires could cause oscillation problems generally in amplifiers with MOSFETS as output devices. Is this not a problem with the Aleph designs?