Topband: Effect of DC on Ferrite Toroids?

["Jeff Maass" <jmaass@k8nd.com>]

I recall reading somewhere that putting DC current through wire turns on 
ferrite toroids
could result in damage to the material.

   Am I recalling correctly?

   Is there a current threshold that should be respected?

My concern is the +12Vdc on the feedline to a preamplifier, which will pass 
through a
choke of 8 turns of RG-8X through four #31 2.4-inch toroids. The current is low.

73,  Jeff  K8ND

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