Signal gounding

I finally got around to a job that has been on my to-do list for far too many month. A couple of years ago I installed a separate ground, or earthing circuit for my listening room. The earthing spike I used at the time was a 50 cm. piece of copper pipe. Not ideal, but it was at hand at the time. The intention had always been to replace this this a proper copper spike, and to up-rate the cable into the listening room to a heavier gauge.  Image I managed to get an earthing spike, clamp while at the electrical suppliers last week, and yesterday afternoon I finally got the job done. One word of advice here, don´t install your earthing spike in the center of a rose bush like I did. Ouch! I used a 1.5 m copper spike to get get the best earth contact. Here the soil is VERY dry for most of the year, and the more copper in the ground the better. I also chose to put this in an area with a large bush that gets watered regularly which should improve the chance of the soil retaining moisture throughout the summer months.

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Once the spike had been hammered into the ground the 6 square mm (9 AWG) cable was attached with a copper clamp and the assembly coated with silicone grease to stop corrosion/oxidation. It was then wrapped in electrical tape.

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The cable was run through the wall, in conduit, in to my listening room. The white box on the exterior wall

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houses the air pump  for my MG-1 air-bearing tonearm so I was lucky to have the conduit there  from this previous installation. The cable is terminated in the listening room on a bus bar, mounted on my equipment rack, which allows multiple cables to be connected at a central point.

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The bus bar is then used as a central earthing point for all my phono equipment (SUT´s, phono stages and turntables). This is a star-grounding layout, and allows me to keep my signal ground and electrical ground completely separate. It is much easier to eliminate earth/ground loops with this setup, and in my system it has helped lower the overall noise floor considerably.

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