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.…
--Chuvk