Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: RE: Why would reversing AC leads reduce hum in a component? posted by Tre' on February 10, 2017 at 08:42:33:
why would reversing the feed to the primary winding of the power transformer cause a safety issue?
In and of itself, it wouldn't but, if performed - as is often recommended - by reversing polarity at the mains input rather at than the transformer input, it very likely means (at least in the UK) that the fuse is in the neutral line, not the hot.
Hobbyists who don't understand why that might matter should either steer clear of the "tweak" or seek expert help. I suspect Parasound's feature addresses the issue perfectly safely but I'd hesitate to encourage users to try the idea on other designs unless they know what they're doing.
Though the benefits of competently configuring the polarity of transformer primaries to minimise leakage currents (aka transformer "sexing") have been known for decades, I'd wager that the cause of the OP's hum problem lies elsewhere.
HTH
D
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Follow Ups
- RE: Why would reversing AC leads reduce hum in a component? - Ryelands 09:19:22 02/10/17 (15)
- All true in the perfect world of today. - jea48 08:45:55 02/11/17 (4)
- RE: All true in the perfect world of today. - Ryelands 10:59:57 02/11/17 (3)
- RE: All true in the perfect world of today. - jea48 14:21:47 02/11/17 (2)
- RE: All true in the perfect world of today. - Ryelands 15:38:17 02/11/17 (1)
- RE: All true in the perfect world of today. - jea48 21:32:56 02/11/17 (0)
- RE: Why would reversing AC leads reduce hum in a component? - Tre' 16:09:31 02/10/17 (8)
- RE: Why would reversing AC leads reduce hum in a component? - Tweaker456 10:32:08 02/11/17 (7)
- RE: Why would reversing AC leads reduce hum in a component? - Tre' 13:02:45 02/11/17 (6)
- RE: Why would reversing AC leads reduce hum in a component? - Ryelands 13:57:13 02/11/17 (5)
- RE: Why would reversing AC leads reduce hum in a component? - jea48 18:20:16 02/11/17 (4)
- RE: Why would reversing AC leads reduce hum in a component? - Ryelands 18:56:32 02/11/17 (3)
- RE: Why would reversing AC leads reduce hum in a component? - jea48 21:33:23 02/11/17 (2)
- RE: Why would reversing AC leads reduce hum in a component? - Ryelands 06:35:40 02/12/17 (1)
- RE: Why would reversing AC leads reduce hum in a component? - jea48 10:26:16 02/12/17 (0)
- Tre' Ryelands answered for me.... - Uncle Mike 09:56:38 02/10/17 (0)