Yet Another Aleph J Build

[poseidonsvoice]

making me think!!! How about pointing me toward a schematic of the version prior to this?

I described the differences here including some of the design topology:

So a little word on some of the technical differences between the two designs. It's very easy to see that ZM has tightened up his version particularly in a more compact layout, use of cascode regulation for the input JFETs and finally some current sources. The output stage uses the Aleph CCS but with IRF 150's which provide intrinsic matching! As such it is a much more turnkey method of building an Aleph J. There is no need for matching the output devices whatsoever.

Best,
Anand.

 

[Zen Mod]

as it seems you didn't post it, here it is, schm of built one

 

[vanofmonks]

Are you sure that that maters? When I tighten down the screw hold downs on the euro blocks the ferrule is flattened.

It may not in practice. But they are made for that purpose and I have both so I haven't tried. But still likely much better to use hex in square block than bare wire.

 

[shawnra]

I agree with the sentiment ferrules are the way to go. Bare wire works but ferrules stand the test of time better. when you look in most control consoles for CNC and like machines they use ferrules all the time to complete connections.

 

[shawnra]

and one last point, it really cuts down on stray strands and possible shorts

 

[Toys4Boys]

I'm a bit disappointed in the sound of my Aleph 🙁, oh wait it just warmed up.

 

[thimios]

Second board ready to install.
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Nice job!
Where you get the pcb?
Are gerbers posted somewhere here?

 

[Extreme_Boky]

I'm a bit disappointed in the sound of my Aleph.

Interesting. A class D guy, arent ya?

 

[Toys4Boys]

Interesting. A class D guy, arent ya?

Don't have anything against Class D, but.... For all I know it may be more accurate than A or AB, but the models I've heard to date lacked a little meat on the bones in the mids. I would comment that most early SS designs were kind of hard to listen to, so maybe w/ continued development???

 

[Toys4Boys]

@thimios My understanding is they will be hitting the store in the near future, I was picked to build 1 of the first to see if even a could build 1.

 

[Dennis Hui]

I was picked to build 1 of the first to see if even a could build 1.

You've done well, Lord Vader.

 

[Toys4Boys]

Ahhhhh. Listening to Sarah McLachlin, Mirrorball, she sings so sweetly as does my Aleph! I was going to post 1 of her videos but couldn't decide which one.

 

[Jacruzer787]

Coming together slower than expected, but nicely.
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Oh lookie here. Another one of @birdbox trafo car seats in the wild!!!

I wonder where to get those!

 

[Toys4Boys]

Just powered up my Aleph and had a hum through the speakers, not 60Hz, very similar to my SuperNait 3 if it has an "inductance" hissy fit. Powering down, briefly, no effect. Remove the left channel RCA and that channel stopped, did the right, same, re-connected and it's gone. There is 1 other difference in the system, yesterday I connected MFF RCA's and connected my sub.

 

[andynor]

How and to where did you connect the sub?

 

[Toys4Boys]

Solid RCA M->FF, plugged in to the back of the amp, and run to sub.

 

[xt0rted]

What LEDs did you use for the front panel? It looks like the holes on mine are around 1.8mm but I only found a couple LEDs of that size in stock and none of them were blue.

 

[Zen Mod]

and what "mine" is?

 

[xt0rted]

The PASS Diy front panel

 

[Zen Mod]

OK, then situation is clean - question for Gianluca and guyz already having them in hands

if hole from back is either 5 or 3mm Dia , then smaller hole in front is just light window, all what's needed is to push LED in protrusion from back

personally I like that approach - 3 or 5mm Dia protrusion, 1mm Dia hole for light