I read the Wiki about hysteresis and Permalloy wrong. At first, I thought it said that high-hysteresis was desired in recording head material, which sounded daft to me. I just reread it and confirmed that I was mistaken. Too much late night reading, I guess. I really should dig into new concepts with a fresh mind.

Back to the L90. I imagine those have A5 as the permanent magnetic core? the blades are? Just curious.

Edited 1 time by gckelloch May 6 11 12:04 AM.