Bad batch of cards, or reader/writer issue?

[Dave Britten]

(08-05-2021 01:41 PM)teenix Wrote:  A quick test could be writing the cards with the 65 and see how they hold up. If they fail, and you know the 65 writes cards ok, then the cards could be faulty.

If the cards stay readable, then the 97 may have problems, which could be lots of things. Aged capacitors, poor contact from the ribbon cable, failing sense or CRC chip, corrosion, dirty RW head etc

cheers

Tony

Yeah, I'll do that real quick. Could take quite a few months before I've got my answer, though.

I suspect that if there's an issue with the 97, it's mostly on the writing side of the equation, given that I can't read these cards in my 41 either. I might open it up later and give the R/W head a good swabbing with some alcohol. I wonder if I need to adjust the eccentric shaft to increase pressure against the head. Could be that it's writing weakly due to poor contact.