My Aleph-X compact PCB

[TS Lo]

Hi Bruno,

I'm interested in some boards as well as
power resistors/MOSFETs.

I'm starting to read those threads about Aleph-X.
BTW is VR101 200R??

Cheers

TS

 

[Carondimonio]

Hi all,

well, as for the input caps, no way!!!
They wouldn' t fit on this board even leaving the heatsink out, unfortunately PP caps are wayyyyyy to big. Using MKT caps would make things easier, but I' m not sure the sonic results would be as good as with PP...

TS Lo:
VR101 is 50K.

Cheers,

Bruno

 

[jleaman]

Hi grataku,

hmmm... well, I' ll try to fit the input caps, I guess 2 uF should be OK, what do you think?

Hi jleaman,

the output boards are daisy-chainable, there are also pads for screw terminals with a 200 mil step for this purpose (and, of course, normal soldering pads).
As for the group buy, well... I do not know, it depends on how many people are interested.

Cheers,

Bruno

Im just asking if i can use 4 fets or less or do i have to have huge output stage ? I dont want a power ful amp maybe 20watts ?

 

[still4given]

I believe 4 is the minimum. Have you looked at the Aleph-X Wiki ?

A lot is answered there.

Blessings, Terry

 

[jleaman]

I believe 4 is the minimum. Have you looked at the Aleph-X Wiki ?

A lot is answered there.

Blessings, Terry

Thanks terry ill check it out.. ID like to build it and see how this compairs to the Aleph mini's that i love.. 😀

 

[Carondimonio]

Version 5 - Input caps

Hi all,

well,version 4 has been trashed, don' t ask me why...

I redesigned the board completely and now I have found the place for two PP input caps 😀 😀 😀 😀

The two resistors between outputs and ground (33R 3W) will be mounted on the bottom part of the board, OR stacked above the big output resistors.

Any comments?

Cheers,

Bruno

 

[Carondimonio]

Oh, yes... here' s the schematics (taken from Kristjan site):

 

[Carondimonio]

Yes, I know, I posted the wrong one...

This is the one with mounting holes!

 

[audiotux]

Hi Bruno ,
beautiful , i like it very much
very compact
maybe i use it as headphone-amp

Greetings from Germany

jürgen

 

[analogair]

Bruno

Great work. Nice boards you designed 😀

analogair

 

[Carondimonio]

Hi all,

thanks for the compliments, guys!

Right now I' m taking a shot at redesigning the output boards; I would like to make them a bit more compact and, at the same time, to maximise the distance between the hot spots, as for the suggestion from Mark Stones.

I was also thinking to design a rectifier board (well, this shouldn' t be a big task...), so..stay stuned!
In the meanwhile, I would really appreciate any suggestion/constructive criticism to help me improve these PCBs.

Cheers,

Bruno

 

[Stones]

Good job,

Have you found room for the soft start, Just kidding.

Keep it up.

 

[Carondimonio]

As promised...

Hi all,

here' s the new power poard (4" x 1.2"). Any comments?

Have you found room for the soft start, Just kidding.

😀 😀 😀 😀

Cheers,

Bruno

 

[Stones]

Re: As promised...

here' s the new power poard (4" x 1.2"). Any comments?

Move the "drain" track into the middle.

 

[jleaman]

I think im going to have to order heat sink's... Im definatly wanting a set of these 😀..

 

[Carondimonio]

Re: Re: As promised...

Move the "drain" track into the middle.

Hi Mark,

to move the "drain" track into the middle I should change also the order of the connecting pads. Not that important, but I do not like it aesthetically... 😀

So, after some thoughts, I decided to revert to the previous placement of the mosfets (along the long side), but keeping a greater distance between them.

What do you think?

Cheers,

Bruno

 

[rchua77]

I feel the latest output stage board would be more suitable. I like the idea of having the FETs along the long edge.

Hope there'll be a group buy for this!! It looks fantastic!

 

[Stones]

Well um I was being a wee bit pedantic (did I spell that right?)

 

[Carondimonio]

Rectifier Board

Hi all,

well, I designed a first draft of the rectifier board.
It' s 3.2" x 3.2" and can accommodate both TO-220 (MUR15XX and the likes) and TO-247 (MUR 30XX dual rectifiers with common cathode) rectifiers.

Usual question: any comments/suggestions?

Cheers,

Bruno

P.S.: Mark, you weren' t being pedantic, your suggestions have been deeply appreciated and very useful for a noob like me!

 

[steenoe]

Hi Bruno, here is a rectifierboard that's known to work🙂 Just for inspiration😉 http://www.diyaudio.com/forums/showthread.php?s=&threadid=42105&highlight=
Your A-X boards are looking great😎

Steen🙂