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RE: Spectral analysis of toroidal transformer center?_(long-ish)

In theory, a perfectly balanced toroid would have zero flux in the center where the bolts are usually placed. However, in the real world, things are never quite that cut and dried.

Lines of flux DO pass through the center region, and even if one argued a perfectly balanced winding and core (HA!) the bolt does not have zero diameter, and therefore, will be subject to some magnetic flux being present.

My personal theory about the reality is that the presence of a magnetic bolt OR a conductor, will actually draw some of the flux lines toward the center more than if there were no such material present.

A non-magnetic AND non-cnducting fastener (such as a nylon one) should prevent this and prevent any deleterious effects from occuring.

Note that use of a plastic bolt and nut, such as nylon, may require a larger diameter to still hold the transformer securely and safely, especially for shipping purposes. Other wise it might be a good idea to swap the original steel bolt and nut back in for shipping purposes, or when transporting the amp for any significant distance.
Jon Risch


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