An illustrated guide for Aleph 60 builders

[PKI]

Where have you been before? 🙂
Oh, they are as available as R100 anyway 🙂

 

[buzzforb]

May still be some floating around. I would assume better linearity, not that it is important to Aleph sound.

 

[generg]

Just installed IRF9610 in the FE of my Aleph's. I have to admit, for my taste these transistors suit the amp's sound much better!

Thanks, h_a! ;-)

Happy to hear that someone shares my experience that the 9610 inputstage is still worth being tried. 🙂

My last experience with it was a J2 clone with them in the inputstage instead of double J109.
Also a fine sound!

I tried an R550 in an Aleph P, the sound was less dark but it was not a big jump forward in my ears.

 

[buzzforb]

Trust Generg, PKI. He has been around the block, two times😀

 

[Zen Mod]

and yeah - with all ears

around the corner

 

[generg]

and yeah - with all ears

around the corner

ha, ha, ....... I deserve it, liking old fashioned IRF9610.....😀😀

old ears like old parts....🙂

parcel came in ZM? 🙄

 

[Zen Mod]

not yet , my funny friend 😉

 

[PKI]

Just for the record I want to mention it here:

From my own experience (at least if you do not have insanely sensitive speakers): Pa's SE amps do sound better with an active preamp. I plugged a Forte model 2 preamp(not the most analog sounding pre) to my Aleph (now its Aleph 30). It revealed some more details which SE amps hide compare to my F5, added some depth, a little bit punch and dynamics on intense, dense music. So, I will be making an active pre for SE amps from now on. (I do not need it on me F5Tv2 🙂

 

[generg]

sounds very reasonable to me, I have experiences in the same direction...

Hum of F6 is gone....?

 

[PKI]

Me? It was not me ;-) I am still waiting for F6 kit and Primrose GB's. Maybe this is the time to build some preamps.

 

[generg]

sorry....had hum in the brain....😀😀

 

[buzzforb]

Its BUZZZZZZZZZZZZZZZZZZZZZZZ!

 

[Danger Mouse]

Hello

After solving hum problem at my aleph J i going to plan my next project
a Aleph 60.

Because of limited space in the chassis i dont get the trafos in the front of the chassis side by side

Now i have 2 options:
1. to staple the trafos in the front of the amp
with stapled psu in the rear part
2. trafos side by side from front to rear with psu on top

-in both cases the input is on top in the rear part of the amp
-the picture should be a view from the side

I dont want pick up hum from the trafos in the input stage,
which one would be the better solution?


thanks for suggestion

 

[PKI]

I would pick option 1 with two trafos stack on a top. However, I've seen many people do PSU right above the transformer.

 

[Danger Mouse]

Thanks, i also think first variant will be the preverred.

I`ve seen var. 2 at a f5 turbo somewhere, it seems working also.
But i really dont trust that the trannys will not stray into input stage.

I`ve heard that in the middleaxis of a tranny the magnetic field will be strongest.
And this will be in var.2 with the PSU between direct under the input stage.

 

[PKI]

About dance packing inside enclosures: look at first cubical alephs 🙂

 

[Danger Mouse]

Just installed IRF9610 in the FE of my Aleph's. I have to admit, for my taste these transistors suit the amp's sound much better!

Thanks, h_a! ;-)

The IRF9610 came from Vishay IR or someone else?

 

[Danger Mouse]

Originally Posted by Zen Mod

did you chew on conversion to cascoded Jfet FE ?



I did...
...and i found this http://www.diyaudio.com/forums/pass-labs/135787-jfet-input-aleph-60-a-2.html#post2242371

but i also think about to use a cascode like in the f5 turbo v3 (Q7,Q8)
and use the standart Aleph J frontend with double the 2sj74 (4matched jfet)

could this work?

Variant from Zen looks also good but i dont understand what he did😀

 

[Zen Mod]

is there a question ?

😉

 

[6L6]

I don't think the links work properly...