[sdiy] Fixing humming transformers in 1u rack units

[Magnus Danielson]

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.

Cheers,
Magnus