Dx Blame MKIII-Hx - Builder's thread

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I've just come back from hospital. Atrial fibrillation. Got fixed but still recovery will take some time. I see that Alex did quite good job. I'll try to check pcb consistency with the circuit diagram over weekend. At least I'll do random check of various parts. If I discover any discrepancies I'll report these. Has anyone found any layout errors?

cheers,
 
LT Spice

I did not find any errors but I only checked randomly selected sections.
I do not know if you did here LT spice analysis. I have created two versions of this amp: single Miller and two pole compensation. Changed a few component values to get smaller distortion.

How things are going with pcb design?

cheers,
 

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It's been a while... I reopened the box. I tweaked the gain resistor, readjusted the bias and closed it back. It's that good ;-)

Attached are the shematic at 28dB gain and the PCB modifications I did over time. Dunno if they were documented here or not. PCB mods were to properly isolate the lifted audio ground for total silence at rest.

-Martin.

PS: Olá Carlos!
 

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  • 2018-05-02 19-36-35.jpg
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