Another Aleph ?? under construction..

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Well..

This is my current project..
I'm still choosing wich project.., an Aleph 5 or an stereo aleph 60.
Toroids are 625VA 2x25VAC..
Still got a little problem.., when switching on.., the toriods make a little hummm.., 5 seconds later it's gone.., then 5 seconds it reappears again.., anyone got a solution? I don't use inrusch limiters..(I know I should🙁 ), each channel is loaded with 130.000uF..



Sorry for the big pictures..
Thank you
 
Still the main question..
Wich amp.. aleph 5 (more bias?) or an aleph 60.
Someone who knows wich cures the hummmm?
I have in the mains (220V) 2 ferite cores for each transformer (like a pig nose :xeye: ) to filter high-frequent..maybe that's the reason..
On the secondary I also have ferite cores but then only on the ground connection.. as seen on the inside picture.
Any help?
Thanks..

DIY Rules..
Nelson Ruleszzz
 
Blank, are you looking for a new project or are you wandering what the heck to do with your current setup?

You could always put it in your bakfiets and deliver it to my brother. I will pick it up in no time 😀 and make it an aleph-x
Btw. where do you keep your bikes now ???
 
X

I think that might be a bit to high.

Do you have the manuels for the aleph-60. If not I can point you in the right direction.

I was just joking about the X because that is the hip word this time of the year.

It gives a new meaning to X-mas.:angel:

Where about do you live in Amsterdam?
 
I thought so to.., an stereo aleph 60
The commercial version has heatsinks as a size of (going from chassis size) :

Volksamp= 390x140 = 54600cm2 x2= 109200cm2
Mine = 320x300 = 96000cm2

Since I'm using a lower voltage 32V approx. i'll be in the save section.
Plus I'm thinking finishing front and back with more heatsinks.
Thanks.
I'm gonna remove the ferrites on the primary section, maybe that's the reason of the 60hz hum.
 
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