Did you try contacting Mark to see what he has available? I am in New Jersey and could take a look at the amp if you are close by. Email me at Vujadeaudio@optimum.net
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I heard back from Mark. It looks like Melos is planning a return...
He was able to offer some advice regarding the mosfets used that tended to over heat because of inadequate heatsinks...
My local guy still wants a schematic so he can pinpoint the exact issue rather than working from a suggestion
To that end it's been suggested I try to contact George Bischoff who designed the circuit. I tried contacting him through george mark audio, which has a live website but from never ending rings and emails that bounced back immediately seems to no longer be a functioning business.
Does anyone know how to get in contact with George these days?
I'm excited that there are future upgrades coming through a new Melos but still want to get the amp running properly as it stands today.