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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: RE: You would still have a ground loop. posted by jea48 on July 5, 2007 at 07:14:55:
The preamp circuit and the power amp circuit have separate safety-earth wires that go back to the circuit breaker panel. According to Steve, this setup, with both monoblocks fed from one hot wire, does not hum.
Therefore the use of the second hot wire for one monoblock is the proximate cause of the hum. Whether it is because of the small residual current in the neutral wire, or mismatched power transformer parasitic capacitances, would have to be determined by some simple experiments and measurements.
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Follow Ups
- We also know that Steve's setup with two AC circuits does not hum. - Al Sekela 15:59:03 07/05/07 (2)
- Agree... - jea48 06:05:22 07/06/07 (1)
- Good experiment. - Al Sekela 13:31:32 07/06/07 (0)
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