On 2/2/23 21:23, Tom Hunter via cctalk wrote: > The actual ferrite core doughnuts do not break down with continued use, BUT > moisture or mechanical impact or vibration will damage or degrade the > ferrite cores. Otherwise the ferrite doughnut will live and maintain its > properties "forever".
Well, I don't know about that. The CDC 7600 had issues with core overheating and included a "Duty Cycle Integrator" on core. See PDF page 51, page 2-24: http://www.bitsavers.org/pdf/cdc/cyber/cyber_70/60367200D_Cyber70-76_Jul75.pdf --Chuvk
