The Aleph Design Reloaded

[bigfishe]

Are there any updates for the original Aleph 0

 

[gl]

If I were to build another Aleph of any flavor I would definitely include Allen Newby's elegant clipping mod. I'm not sure if the mod produces an audible difference, but it's simple and it's an improvement. Unfortunately his web site doesn't want to come up for me. Maybe someone else might have better luck.

http://www.diyaudio.com/forums/pass-labs/115674-aleph-clipping-mod.html

Graeme

 

[Zen Mod]

Are there any updates for the original Aleph 0

yup

later Alephs

If I were to build another Aleph of any flavor I would definitely include Allen Newby's elegant clipping mod. I'm not sure if the mod produces an audible difference, but it's simple and it's an improvement. Unfortunately his web site doesn't want to come up for me. Maybe someone else might have better luck.

http://www.diyaudio.com/forums/pass-labs/115674-aleph-clipping-mod.html

Graeme

agree ; zenner diode is easy to add

if for nothing else , for better sleep certainly

 

[AudioSan]

Break the trace between GND and -IN, add pads for jumper.

Balanced input (XLR) needs that separated, but if the builder will use RCA exclusively, the jumper can be installed.

Can you also add pads/holes on the capacitors for 7.5mm and 5mm lead spacing?

aleph3 is not a balanced amp

 

[6L6]

Oh, I guess you're right... I'm so used to the diff. pair being able to be fed from one or both sides... It wouldn't be very hard to add, just 2 resistors.

 

[thiagomogi]

6L6 this way?

An externally hosted image should be here but it was not working when we last tested it.

 

[6L6]

Yes.

 

[BigE]

You sure about the negative input being on the ground (+) side of the cap?

 

[thiagomogi]

capacitor?

 

[AudioSan]

negative input is actualy signal ground. cap is on negative rail, so positive is going to ground.

 

[Zen Mod]

not exactly

in this position , cap polarity orientation is almost irrelevant

presumably , no DC there

 

[thiagomogi]

Capaciitor 5mm and 7.5mm
Mosfet 6mm edge
XLR and RCA input
better?

 

[AudioSan]

not exactly

in this position , cap polarity orientation is almost irrelevant

presumably , no DC there

thay are at the rails. the 2 lower caps in the corners.

 

[Zen Mod]

thay are at the rails. the 2 lower caps in the corners.

now I'm confused

aren't we talking about question in #48 , ref to sch in #46 , 220uF at inner LTP (negative) input ?

 

[AudioSan]

ZM. i think it was the cap in the right lower corner no i'm confused too
but on the other hand, it's no longer inportant as the curcuit now is made balanced

 

[dady]

The 220µF on the negative IN.

 

[Chamberman]

Capaciitor 5mm and 7.5mm
Mosfet 6mm edge
XLR and RCA input
better?

Add additional holes to +/- 25V & GND to accept larger 14/16ga wires. I'm not sure how thick your heatsink plate is, but you might want to try and separate your output mosfet pairs a bit more for thermal spreading purposes. If you have a 3/8" or thicker plate it probably will not matter.

Also slide the 1nf cap near the input LTP to the right or move the 10k resistor to the left.

 

[thiagomogi]

heatsinks is 22mm x 27mm x 7.5mm

 

[dady]

mm or cm?

 

[Zoef]

If we are talking heatsinks, would a heatsink of 154x154x34 mm be big enough. (2 heatsinks per pcb so 308x154x34 mm)