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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: I give up... posted by cloudwalker on September 16, 2016 at 22:21:43:
Just some food for thought. The power supplies in your audio equipment, depending on their design, can be a significant source of noise. Especially big SS amps with large capacitor input power supplies. High current spikes hitting the power transformer 120 times/second cause ringing (vote in favor of choke input supplies). These spikes have harmonics many times the 120Hz fundamental producing noise up to RF frequencies. Unless the transformer's secondary is snubbed, most manufacturers don't, this transformer ringing will also add to the noise. This can not only pollute the circuits connected to the supply but also exit the gear via the power cord and radiate this "trash" to other gear.
Home AC mains are single ended. One line is grounded. This makes the power cords dangling from your gear antennas for noise (see above). One use of an isolation transformer is to rebalance your line. Feeding your gear balanced AC as opposed to single ended, noise picked up by the power cords will be common mode which will mostly be rejected by the power transformers in your system. Big recording studios use balanced power for a reason.
"It is better to remain silent and thought a fool, then speak and remove all doubt." A. Lincoln
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Follow Ups
- RE: I give up... - JKT 09/16/1623:15:31 09/16/16 (1)
- +1 balanced power (I use it) n/t - tweakmenow 14:32:21 09/17/16 (0)
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