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Old 28th August 2004, 06:10 AM   #1
PatPet is offline PatPet  Hong Kong
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Default Aleph-P finished!

Special thanks to Klaus who helped me a lot throughout the DIY work. It' had been painful to figure out the bug that I carelessly made by misreading the resistance of 22.1ohms and 33.2ohms as 221ohms and 332ohms respectively. He simply gave me a hand that took me out of serious troubles.


The following picture shows the main pcb
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Old 28th August 2004, 06:26 AM   #2
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The whole thing with the chasis opened
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Old 28th August 2004, 06:31 AM   #3
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Front view
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Old 28th August 2004, 06:43 AM   #4
PatPet is offline PatPet  Hong Kong
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Rear view
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Old 28th August 2004, 06:56 AM   #5
PatPet is offline PatPet  Hong Kong
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Front view at a different angle
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Old 28th August 2004, 07:07 AM   #6
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Very nice job! I see you also have the mandatory Blue LED also.
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Old 28th August 2004, 07:19 AM   #7
PatPet is offline PatPet  Hong Kong
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Thanks kilowattski . The Blue Led act as constant voltage source as part of the power regulator, which will be used for DAC upgrade later on.

Power supply section:
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Old 28th August 2004, 07:23 AM   #8
PatPet is offline PatPet  Hong Kong
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The stepped attenuator
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Old 28th August 2004, 07:25 AM   #9
PatPet is offline PatPet  Hong Kong
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PCB, again
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Old 28th August 2004, 07:35 AM   #10
PatPet is offline PatPet  Hong Kong
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Grounding schematic

I got very very little hiss noise when the volume is set at the last few greatest volume.
The gain resistor used is 316ohms.
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