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Old 28th January 2011, 07:59 PM   #1
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Default Grounding check for SE 300B amp

I want to optimize my SE 300B monoblocks and rebuild them completely. Even that I never managed to build one with hum or noise, I want the ultimate grounding scheme for this one. Anybody with suggestions? Thanks

BTW, all ground wires will be 1mm OF Silver with cotton sleeves.

Last edited by HornTube; 1st May 2014 at 01:24 AM.
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Old 28th January 2011, 08:23 PM   #2
Gluca is offline Gluca  Italy
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I never had hum problems with star grounding like yours but consider that you can pick up 50/60Hz noise from wiring or transformer coupling and that has nothing to do with grounding. Also check if there is any ground loop at the input.
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Old 28th January 2011, 08:28 PM   #3
tomchr is offline tomchr  United States
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Star grounding is your friend. Keep loop areas small - i.e. signal "hot" and signal "return/ground" need to be closely coupled. Think twisted pair.

I suggest verifying the grounding scheme with regular copper wire before moving to any kind of boutique wire. What matters for signal integrity is the resistance and coupling capacitances, leakage/coupling inductances.

~Tom

Last edited by tomchr; 28th January 2011 at 08:31 PM.
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