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General Asylum General audio topics that don't fit into specific categories. |
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In Reply to: Re: There are things you can do. posted by Omera_T on April 4, 2007 at 12:59:57:
Yes, you may be on a sub-panel and subject to all the noise from the main house as well as whatever else is powered by the sub-panel.If you had the utility company install a separate drop for the garage or even your audio system, it would have its own earth rod and would markedly improve your ground isolation. This might be cheaper than a house full of fancy filters.
Regenerators have limited current capacity, so might restrict dynamics with some combinations of amps and speakers. Running the power amps straight from the AC admits all the AC noise to your system. You still have the problem of power cord resonance between the regenerator and the equipment.
My filters are DIY and still under development. Filtering for noise sources is a slightly different problem from filtering the AC into audio components, but a good tweak is to use antiparallel rectifier diodes in the AC safety-earth lead in either case. These are at least 6-ampere capacity and the higher the reverse voltage rating, the better. Some inductance in series with the diodes is good: JW Miller 5522 RF chokes are made of beefy wire and kill a lot of the noise that gets through the diode capacitances. A 1K shunt resistor might be needed for things like UPS devices that sense ground and shut themselves down if they don't find it.
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Follow Ups
- Check the power wiring closely. - Al Sekela 16:20:56 04/05/07 (0)
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