ALEPH-XMM - The Mini-Monster - diyAudio
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Old 24th November 2003, 10:19 PM   #1
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Default ALEPH-XMM - The Mini-Monster

Hello,

Here is the version of Aleph-XM amplifier, but in 'mini' version.

It is also an X, two-stage balanced single-ended amplifier, with
the DC feedback Zen on each output stage.

The total bias is slightly below 5 A, and the total heat dissipation is
around 175 W or 44 W ! per device, so the heatsinks should be rated
at 0,2 K/W as the real minimum.

Power output should be about 65 W / 8 Ohm, or around 45 W into 4 Ohm
load, with the specified parts and the power supply.

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

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Old 25th November 2003, 05:44 AM   #2
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I like it. perhaps IRFP260's would be able to handle 44 watts easier. Lots of people want PCB's When do you estimate yours to be ready?
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Old 25th November 2003, 09:16 AM   #3
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A couple of IRFP044's would probably be absolutely perfect for this.
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Old 2nd January 2004, 04:00 PM   #4
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A couple of IRFP044's would probably be absolutely perfect for this.
What about a couple of IRFP054's?
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Old 3rd January 2004, 12:18 AM   #5
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Default Mini Aleph XM

Any chance that mini - mini Aleph X may be available someday? A single transistor version with current source would be perfect for my needs.

George
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Old 3rd January 2004, 03:41 AM   #6
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Default Re: Mini Aleph XM

Quote:
Originally posted by Panelhead
Any chance that mini - mini Aleph X may be available someday? A single transistor version with current source would be perfect for my needs.

George

Looking into the circuit, it appears to me that four is the minimum number of transistors. Chnging the 0.27 ohm resistors to something like 0.54 should get the power consumption down to manageable levels for me.
Are boards going to be available for this?
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Old 3rd January 2004, 03:58 AM   #7
jwb is offline jwb  United States
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Am I being dense if I don't understand why this is "mini"? It seems to be capable of 80W into an 8Ω load, or 50W into 4Ω. My Aleph-X delivers 40W into 8 or 4Ω, and I don't consider it miniature! It's quite an effort!
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Old 3rd January 2004, 10:29 AM   #8
loovet is offline loovet  Sweden
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Default Simulation

Hi Kristijan,

Iíve tried to simulate your schematic in CircuitMaker. But I donít get the same result as you do.

In 8 ohm I get around 20 W and in 4 ohm I get around 40 W. Where am I wrong?

Shouldnít I get it otherwise, more W in 8 ohm then in 4 ohm load.

By the way, Iíve changed the BC550C to ZXT450, I donít think that would cause any problem, do you?

BR

/loovet
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Old 5th January 2004, 06:12 AM   #9
grataku is offline grataku  United States
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Look dude, I wasn't gonna say anything but ...this is no different from the Grey version so it ain't no mini, it's more like another kulata from kularjic.
Wanna build it? Buy a couple of boards from Chad and get to work.
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