Lot of nice HP Classic Calculators - 45s, 65s, 67s,

[JohnRausch]

I should have posted this as a reply instead of editing the original post. I removed the following information from the original post.

I found and fixed the problems with the HP-67s. They now work perfectly. I had said there were card reader problems. It was poor connections between the leaf springs and the circuit board. All it took was cleaning them. I also changed out the RG58 couplers to the double insulation method recommended years ago by Geoff Quickfall. It was a mistake to change my 65s and 67s to the RG58 coax method. I will probably change all of the 65s back to this method, requiring only taking off the backs and unscrewing the motor to access the coupler. It won't take long. Changing to RG58s was a mistake -- they crack over time.