On Thursday, January 30, 2014 1:32:36 PM UTC-5, Bob Engelhardt wrote:
"Brass"? I thought cores were either aluminum or copper. Brass is a

much poorer conductor of electricity, so I'd expect the same with heat.

Yes/no?

Well brass has about 1/4 the conductivity of copper (at 300K) but it's still pretty good. (about the same ratio as in the electrical conductivity) I expect the weak link in the thermal conductivity chain is the metal to air interface.

George H.



Bob