On 8/6/21 10:27 AM, Paul Koning via cctalk wrote: > > That was done by a number of people using MR (magneto-resistive) heads. John > Bordynuik was one of them, years ago; some others have done likewise. Those > heads were built by IBM for high density tape cartridges; 6250 is low density > for them. They have some nice properties, from what I understand, one of > them is that the output signal levels don't depend on the tape speed as > regular inductive heads do. So for old tape recovery you can readily run at > very low speeds if needed to protect fragile media.
IBM 3490 - 36 track. The 3590 and later get silly numbers of tracks on half-inch tapes. Don't know if the 18-track 3480 was MR, however.
