Re: RCA AR88D Comms Receiver.
They'll be carbonyl iron particles pressed together. Modern materials will have better binding agents. They won't be ferrites. Ferrites have too much permeability and lower stability.
Dust-iron cores going off with time is a new one on me. Something to watch out for when I get round to restoring my AR88.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
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