The Aleph30 PCB layout

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#204
Peter, I sent you an email a few days ago, but haven't heard back. I would really like to get a set of boards, and am also thinking about getting your premium kit off of audiosector.com. Could I place an order for the kit and send you an extra $25 for the a30 boards?
 
#214
regulated power supplies

Newbie question:

Can a pair of regulated SLS-24-120T sola power supplies energize an Aleph 30? I'm using this amp for my top-end (tri-amped) 500hz to 20,000hz; so I need transient response rather than brute power (bass) capacity.

They're rated at 25volts, 12amps. I thought I could couple a pair to get 25+ /0/ 25- out.

Is this enough power to drive stereo, or should it remain mono?

Seems to me, the ripple is 0.05% of output.

I'm having one heck of a time locating 100,000uf caps! This is one of the reasons that I'm following this train of thought.

Thanks everyone,

John Inlow
 
#215
Each Aleph 30 circuit draws 2 amps, so a stereo will need 4 amps. I you want to raise the bias to improve performance, you will mabye see 1 amp more for two channels - those supplies are rated at 12 amps, so I think its safe to use two in series to power a stereo A30, as the current draw is constant, given the Class A design. Weather it is OK to serielcouple the two supplies is another question that I dont have the knowledge to answer. How good it will sound I also dont know, but they seem to be made for noise sensitive circuits.
Why do you need 100.000uF caps ?


Cheers !
Buhl
 
#217
100,000uf caps

Hi Buhl,

I'm looking for six 100,000uf caps because that's what the schematics call for. If I'm going to alter the plan, then why not REALLY alter it? Hence, the desire to use a very clean, regulated PS. These units have 3millivolts of ripple. Seems pretty clean...

I figure I can couple a positive and negative output lead to create ground/center. Hope this is correct.

Thanks for responding,

John Inlow
 
#220
Hence, the desire to use a very clean, regulated PS.
Click to expand...
Hi John. If you intend to use a regulated supply after the "elyt-bank", you can cut even further in the capacitance. I wouldnt shy away from using only 4x10.000uf pr channel🙂
I figure I can couple a positive and negative output lead to create ground/center. Hope this is correct.
Click to expand...
I recommend that you ask about this in the "powersupply-department" here on DIYaudio😉 I am sure someone overthere knows the answer to your question🙂

Steen🙂
 
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