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
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
An externally hosted image should be here but it was not working when we last tested it.
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?
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
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
Re: Mini Aleph XM
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?
Panelhead said:
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?
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!
Simulation
Hi Kristijan,
I’ve tried to simulate your schematic in CircuitMaker. But I don’t 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?
Shouldn’t I get it otherwise, more W in 8 ohm then in 4 ohm load.
By the way, I’ve changed the BC550C to ZXT450, I don’t think that would cause any problem, do you?
BR
/loovet
Hi Kristijan,
I’ve tried to simulate your schematic in CircuitMaker. But I don’t 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?
Shouldn’t I get it otherwise, more W in 8 ohm then in 4 ohm load.
By the way, I’ve changed the BC550C to ZXT450, I don’t think that would cause any problem, do you?
BR
/loovet
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