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I love that INDUSTRIAL feel to it. Throw some NIN and Beers in to really appreciate it. I like it. Good job.
__________________ We all have our different tastes and some might have the same "EXACT" feelings we have, but the originality and pure experience is from our own. So don't go by what I or many around here say. Go by what you feel.
Photos of my M^3 and S11, finally, with front and back panels completed. From the top:
Don't mean to be harsh, but it looks like you are attaching the ground from the AC line filter to your toroid transformer mounting bolt (entree module mounting on the aluminum back plate as far as I can see on the pic of the σ11 (?). If this is the case, it will defenitely resulted in a closed/completed conductive loop passing through the center hole of the toroid (starting from the outside of the toroid), which in turn resulted in a "short-circuited turn".
To avoid the "short-circuited turn", the ground from the AC line filter should NOT be connected to the toroid center mounting bolt.
__________________ Marantz SA11-S1 => Balanced β22 => Sennheiser HD 650
Don't mean to be harsh, but it looks like you are attaching the ground from the AC line filter to your toroid transformer mounting bolt (entree module mounting on the aluminum back plate as far as I can see on the pic of the σ11 (?). If this is the case, it will defenitely resulted in a closed/completed conductive loop passing through the center hole of the toroid (starting from the outside of the toroid), which in turn resulted in a "short-circuited turn".
To avoid the "short-circuited turn", the ground from the AC line filter should NOT be connected to the toroid center mounting bolt.
No, be harsh, I wouldn't post it if i didn't want feedback!
Do you have a link handy that explains this? Googling the term doesn't quite lead me to toroids for dummies. I fail to see a problem, since the centre screw isn't actually electrically attached to anything in the transformer. Or is it an EMI thing?
That is very much a shorted turn you've created. You should never have anything conductive that creates a loop through the centre of the toroid. Move the grounding wire to anywhere else and you're fine. DO NOT TURN THE AMP ON BEFORE DOING SO!!!
It's briefly illustrated at the bottom of this page -http://www.bicronusa.com/tpt_designenhancements.html
Edit: to further see, stick a multimeter set on ACV between the top mounting plate and the chassis and you'll see that there is a small voltage, this is equivalent of a secondary winding of 1 turn
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Audio electronics- Where we strive for inefficiency