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Old 3rd February 2004, 12:21 PM   #1
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Smile Aleph+Constant current sources X-ZEN

My own X-Zen monoblocs are running at 2.7A each and uses Aleph current sources in the upper zone of the differential pair, and a constant current source at the tail. The CCS works at 5.2volts and at the output points there are 21.7 volts . The supply is fixed at 38V.
Signal and Aleph CS Fets dissipate around 21.5W and the sinks temperature is actually low.
DC offset between the speakers terminals is 2 or 3 mV.
Design reflects the JH6you one in the x-soz thread but I introduced a CCS instead of resistors at the tail , for a better X effect and low dissipation.
The pics show my own realization , based in a wood box + separated heat sinks for each fet so I've been able to avoid insulators between fets and sinks.
There is a fully simmetrical lay-out in terms of pcb and cables lenght, and I have selected the devices for a match of 15mv max vgs.I do not have very good parts though , especially power resistors , but I am happy with they anyway.
Schematic reflects the circuit as I build It .

The babies.....:
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Old 3rd February 2004, 12:22 PM   #2
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another one...
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Old 3rd February 2004, 12:25 PM   #3
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The PS is external, and build pretty much like the Zen V4 with the exception of the modulation part.
There are also the blue leds in the front but in the pics the amps are off
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Old 3rd February 2004, 12:29 PM   #4
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now , the rear panel: all connectors will be subjects to changes in "better parts " direction...
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Old 3rd February 2004, 12:30 PM   #5
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Cute!

Do you like the sound?

Regards,
Remco
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Old 3rd February 2004, 12:30 PM   #6
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... and a view of the sinks side...
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Old 3rd February 2004, 12:33 PM   #7
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Quote:
Originally posted by blank527
Cute!

Do you like the sound?

Regards,
Remco

Thanks , blank527 . Yes I like the sound veeeery much!!!
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Old 3rd February 2004, 12:43 PM   #8
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An eye on the inside...
On the small heat sink is mounted the Fet for the CCS; the capacitor is a nippon chemi-con 56000u -50V ;Necessarily I mounted some resistors in parallel to achieve the wanted dc point.I also introduced -see the Aleph X schematic-the famous "mills resistors" at a value of 22k.
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Old 3rd February 2004, 12:46 PM   #9
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The 2D pics do not appreciate a wiring sistem that is though enough clear
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Old 3rd February 2004, 12:49 PM   #10
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the last one...
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