Official M2 schematic

I received my boards today.

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The mounting holes are on a 10mm grid but DO NOT COMPLY with the diyAudio Universal PCB & Semiconductor Mounting Specification (UMS). I tried to make it compliant but did not like the resulting layout.
I designed the PCBs to use the Conrad Engineering heatsink model MF35-151.5. The boards measure 280mm x 52mm, and on the intended heatsink, Q1 sits at a good distance from the edge. The vertical lines on the heatsink indicate the aluminum angle footprint.

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The mounting holes are on a 10mm grid but DO NOT COMPLY with the diyAudio Universal PCB & Semiconductor Mounting Specification (UMS). I tried to make it compliant but did not like the resulting layout.
I designed the PCBs to use the Conrad Engineering heatsink model MF35-151.5. The boards measure 280mm x 52mm, and on the intended heatsink, Q1 sits at a good distance from the edge. The vertical lines on the heatsink indicate the aluminum angle footprint.

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Nice conrad heatsinks
 
Patience...

Before ordering more PCBs to sell, I need to make sure they work as intended. I have all parts in hand and will build both channels. The next week I’ll be spending time with family and friends, so it will take a few days until the boards are ready to measure and audition.
 
Before ordering more PCBs to sell, I need to make sure they work as intended. I have all parts in hand and will build both channels. The next week I’ll be spending time with family and friends, so it will take a few days until the boards are ready to measure and audition.

My very thoughts before asking for a pair. They should as you say be tested. If they work as expected, and they sure look good and I would foresee no problem, I would like love to have a pair myself. I already have the input transformers and am waiting on some boards like what you have made.
 
Before ordering more PCBs to sell, I need to make sure they work as intended. I have all parts in hand and will build both channels. The next week I’ll be spending time with family and friends, so it will take a few days until the boards are ready to measure and audition.

Good idea to test. I will be interested in a pair once they are verified. They do look nice. 😎