[sdiy] Fixing humming transformers in 1u rack units

Magnus Danielson magnus at rubidium.dyndns.org
Sat Feb 20 20:57:38 CET 2010

Graham Atkins wrote:
> Toroidal manufacturers usually give specific instructions relating to this
> as incorrect mounting can lead to serious or permanent damage to the
> transformer. The metal base of a unit and mounting bolt form part of a
> circuit passing through the toroid. If mechanically attached to say the
> lid, this completes the magnetic circuit.

There is usually very neat mounting kits which avoids the issue and 
provide some vibration damping as well. Looks very good and I always 
feel a sense of satisfaction when having mounting one up.


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