HP-65 more on the card reader

[Geoff Quickfall]

The HP65 / 67 / 97 have a lot in common but some of the hardware such as the worm gear are not interchangeable.

The HP 41 card reader is a complete reworking from the ground up. It was as if the HP65 plans were lost.

I haven’t checked out the compatibility of the sense amp between the two machines. It might make sense that the amp is the same but hardware wise many differences.

Can’t hurt or desolder and replace if all else fails.

Geoff

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