Which resistance controls the card reader speed on a HP-97

[Francois Lanciault]

Thank you all for your contribution.

I will try playing with the value of resistance R1 (using a variable resistance) and report the result. Now I only need to find where that resistance is located on the board. I will check the maintenance manual.

However, I just find out that the cards written by the problematic HP-97 can be read on a HP-67... That means that the speed is not so much different after all...

François