ALEPH 5 wiring diagram

[binspaul]

Hello,

I am in the process of developing a DIY Aleph 5 power amplifier. The main reference document is the original Aleph 5 service manual and KK PCB's (PASS LABS ALEPH-5 - Class-A DIY amplifier schematic & PCB).

In the amplifier schematic/board, I am unable to find the GND path. Where should I connect the power supply GND point and the amplifier GND? Please advice.

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Best regards,
Binu Paul

 

[Zen Mod]

there is a GND wire hole on pcb - that's where you connect wire coming from central PSU GND point

from your post is not clear do you already have pcbs , or you intend to construct/make your own

 

[binspaul]

I am in the process of designing a pcb based on the original schematic diagram and KK pcb and component diagrams. In the KK pcb layout, I was unable to see the ground connection. Is this connected to a chasis plate?

 

[Zen Mod]

bottom part of pcb , as is on pic

you have input pads/holes and gnd pads/holes

 

[binspaul]

I thought they were for the input signals alone. Will it cause any harm or noise issue if I connect the supply GND to the same point?

Also, what about the negative terminal of the Speaker? Only +ve is there on the amp board.

Best regards,
BP

 

[Zen Mod]

there are enough pictures of original Alephs , study them and learn

First Watt amps are made on same principles/approach , regarding physical layout and power wiring

Nobody can't teach you pcb layout wizardry in fast way .... that's sorta multidisciplinary Voodoo , when one have it in hands/brain

KK's pcbs aren't best specimens to study , search forum for other Aleph pcbs , you'll find necessary graphical files , then you can build on that experience

plenty of info around - invest some elbow grease and you'll learn more than from answers on few (random) questions

 

[mpmarino]

From my terrible memory -

I seem to recall an error on the schematic of the original A5 owners manual. I'd suggest comparing it to other schems out there before using it as a reference.