Dr. CockroachApril 27, 2023 - The cores that I bought via Ebay came from Bulgaria and I have no idea of the core material specs. Andy Geppert told me what he used as far as a voltage and current with his Core64 project so I started with that but with these cores I was not getting consistent results. With a lot of flip cycles, I am now Writing and Reading at 13.5 Volts at 270 mA in the X and Y matrix wires. The two 47 Ohm resistors actually measure out as 50 Ohms. So far today I have not had a mis-read and feeling that I am on the right track as the cores held there state overnight.
Dealing with the cores
A project log for Magnetic Core Memory The Dr Cockroach Way
My not so fancy example of Magnetic Core Memory using fairly cheap cores and free parts from my junk box.
Discussions
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Heh, a cake roll.... I think buying the cores is easier over all ;-)
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Rolling VHS tape to a tight straw held together by Scotch tape and slicing donuts with a razor does not work. No detectable flip with reasonable cross-currents. Maybe too much icing, since its not really a donut but a cake roll.
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