For those who noted the error in the bias current draw on the Aleph4 schematic, please note the following reply from Nelson Pass:
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"Well, there are a couple more errors on the schematic which resulted from it being swiped from the Aleph 2 schematic. Among them are X3 on the output stage should really be X6, for 24 output devices per channel. The voltage is
also a little low, and should be more like 6.5 volts.
Sorry about this. I will post corrections the web site. In your case, I recommend that you replace the 1.5 ohm resistors with .68 ohm devices, and otherwise leave the amplifier unmodified.
best regards, np"
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Now didn't this really depress me :-(
there are aspect of the above which don't make sense either. I SUGGEST ALL POTENTIAL BUILDERS STOP & WAIT. I will get this all sorted out and will post a complete update when I'm finished.
Cheers
Mark
_______________________________
"Well, there are a couple more errors on the schematic which resulted from it being swiped from the Aleph 2 schematic. Among them are X3 on the output stage should really be X6, for 24 output devices per channel. The voltage is
also a little low, and should be more like 6.5 volts.
Sorry about this. I will post corrections the web site. In your case, I recommend that you replace the 1.5 ohm resistors with .68 ohm devices, and otherwise leave the amplifier unmodified.
best regards, np"
________________________________
Now didn't this really depress me :-(
there are aspect of the above which don't make sense either. I SUGGEST ALL POTENTIAL BUILDERS STOP & WAIT. I will get this all sorted out and will post a complete update when I'm finished.
Cheers
Mark