Aleph 2 power supply

MikeZ · 20th December 2002, 10:57 PM

I am working on the power supply for an aleph 2 monoblock and I am trying to learn electronics as I build the amp. The toroid purchase has me a little confused. I want a 1000va toroid, thats my preference per Nelson Pass response to a post prior "You can, of course, always get away with less, and it
also depends on the conservativeness of the manufacturer's
ratings" , but what do I use for the output voltage, 30+30, 33+33 or 35+35 etc. What dictates the value of the output voltage.

that brings me to my next question, when I call a toroid manufacturer what do I tell him I want for example "a shielded 1000va 33+33 toroid."

And finally I read in the post about noise in the amplifier due to the power supply and using inductors to recuce this. As I am learning electronics, does a circuit diagram exist which shows the power supply circuit with said inductors.

kristijan-k · 20th December 2002, 11:08 PM

Hello MikeZ,

Here is the one example of the circuit diagram for the Aleph 2
power supply.

Hopeing that will help you.

Best regards.
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip

MikeZ · 20th December 2002, 11:41 PM

Kristijan, So if I understand your schematic, It calls for a 1000va, 37+37 toroid? Thanks Mike

Peter Daniel · 20th December 2002, 11:52 PM

I have two 1000VA toroids from Victoria Magnetics which were custom made specifically for Aleph 2. I plan on Aleph X now, so I want to get rid of those trafos. If you are interested contact me. I'm asking $100 USD ea. plus shipping.

jleaman · 21st December 2002, 12:13 AM

please email me

jleaman@citytel.net

i want them.

fcel · 21st December 2002, 12:30 AM

JasonL ... I hope you mean it this time ... just kidding.

jleaman · 21st December 2002, 12:34 AM

last time some one else got them : O ( sniff sniff.

kristijan-k · 21st December 2002, 04:21 PM

Hello MikeZ,

For the one channel-monoblock of the Aleph 2
power supply, you can use transformers from
at least 600 VA and up.

The 1000 VA transformer is very good choice
for the Aleph 2 amplifier and I would use it
without a seccond tought.

Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip

Mark A. Gulbrandsen · 21st December 2002, 07:08 PM

Mike,
Best of luck building yours....don't hesitate to post here with questions. I've built alot of different amps over the years but the Alsph 2 is something VERY special as you will eventually find out. I used a 769 VA toroid that I was able to buy locally and it works just fine. The Victoria Magnetics toroids are very good, so go for it......I know some of the people down there at the factory and I will be using their toroids on my future projects.
Mark

grataku · 21st December 2002, 07:39 PM

Mike,
Krystian PS is excellent, be sure to understand how it works, what type of coil you need, the wire gauge for this coil, how to arrange everything in the enclosure so that the coils don't disturb the low level input signals etc. It's going to be VERY BULKY, heavy, and expensive. Do you have the heatsinks?

20th December 2002, 10:57 PM	#1
MikeZ diyAudio Member Join Date: Apr 2002 Location: missouri	Aleph 2 power supply I am working on the power supply for an aleph 2 monoblock and I am trying to learn electronics as I build the amp. The toroid purchase has me a little confused. I want a 1000va toroid, thats my preference per Nelson Pass response to a post prior "You can, of course, always get away with less, and it also depends on the conservativeness of the manufacturer's ratings" , but what do I use for the output voltage, 30+30, 33+33 or 35+35 etc. What dictates the value of the output voltage. that brings me to my next question, when I call a toroid manufacturer what do I tell him I want for example "a shielded 1000va 33+33 toroid." And finally I read in the post about noise in the amplifier due to the power supply and using inductors to recuce this. As I am learning electronics, does a circuit diagram exist which shows the power supply circuit with said inductors.

20th December 2002, 11:52 PM	#4
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	I have two 1000VA toroids from Victoria Magnetics which were custom made specifically for Aleph 2. I plan on Aleph X now, so I want to get rid of those trafos. If you are interested contact me. I'm asking $100 USD ea. plus shipping. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

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20th December 2002, 11:41 PM	#3
MikeZ diyAudio Member Join Date: Apr 2002 Location: missouri	Kristijan, So if I understand your schematic, It calls for a 1000va, 37+37 toroid? Thanks Mike

21st December 2002, 12:13 AM	#5
jleaman Banned Join Date: Apr 2002	please email me jleaman@citytel.net i want them.

21st December 2002, 12:30 AM	#6
fcel diyAudio Member Join Date: Sep 2001 Location: LA County	JasonL ... I hope you mean it this time ... just kidding.

21st December 2002, 12:34 AM	#7
jleaman Banned Join Date: Apr 2002	last time some one else got them : O ( sniff sniff.

21st December 2002, 04:21 PM	#8
kristijan-k diyAudio Member Join Date: Mar 2002 Location: CROATIA	Hello MikeZ, For the one channel-monoblock of the Aleph 2 power supply, you can use transformers from at least 600 VA and up. The 1000 VA transformer is very good choice for the Aleph 2 amplifier and I would use it without a seccond tought. Best regards, Kristijan Kljucaric http://web.vip.hr/pcb-design.vip

21st December 2002, 07:08 PM	#9
Mark A. Gulbrandsen diyAudio Member Join Date: Sep 2001 Location: Salt Lake City	Mike, Best of luck building yours....don't hesitate to post here with questions. I've built alot of different amps over the years but the Alsph 2 is something VERY special as you will eventually find out. I used a 769 VA toroid that I was able to buy locally and it works just fine. The Victoria Magnetics toroids are very good, so go for it......I know some of the people down there at the factory and I will be using their toroids on my future projects. Mark

21st December 2002, 07:39 PM	#10
grataku diyAudio Member Join Date: Dec 2000 Location: -	Mike, Krystian PS is excellent, be sure to understand how it works, what type of coil you need, the wire gauge for this coil, how to arrange everything in the enclosure so that the coils don't disturb the low level input signals etc. It's going to be VERY BULKY, heavy, and expensive. Do you have the heatsinks?