Trying to recover 67's prerecorded magnetic cards

[teenix]

(08-16-2021 01:26 PM)aurelio Wrote:  Hi Tony, I've done the procedure using different calculators before to post; they all are supposed to write/read normally as I've checked, for this reason I thought the problem located in the card, maybe unrecoverable. I think it's definitively the original card: I tryed with a a rewritable "cut" card, this time it works, with all the machines.
How could be damaged the card from the original pack ? Apparently it has no external defects

Maybe the magnetic strip has deteriorated over time and data can't be stored reliably anymore. I don't know if these can be refreshed by deguassing or not.

cheers

Tony