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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: Undedicated test wasn't scientifically controlled posted by author@escapeclause.net on March 18, 2010 at 12:35:41:
The Monarchy site does not have pictures or other mention of this model.
There are two ways to cause toroidal transformers to hum: to present them with severe harmonic distortion (DC on the AC) or to apply excessive voltage to them.
If you use a DC blocker and still have the problem, then how sure are you that your line voltage is correct?
If the neutral wire has a bad connection at the utility transformer, your line voltage will be increased whenever you or another customer that shares the utility transformer draws current on the opposite leg. Even in a normal situation, any shared resistance on the neutral will cause a slight increase in voltage. If you see more than a few volts of difference over time, call the utility company and ask them to check their transformer.
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Follow Ups
- Did your SM-100 monoblocks have toroidal power transformers? - Al Sekela 16:01:51 03/18/10 (3)
- Thanks for writing back, Al; have new data-point - author@escapeclause.net 16:47:18 03/18/10 (2)
- The ground issue is one of safety. - Al Sekela 15:52:44 03/20/10 (0)
- BTW, I don't know about the Monarchy transformers (nt) - author@escapeclause.net 17:12:36 03/18/10 (0)
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