Looking for HP41CX Advice

[GreyUser]

(08-08-2021 09:24 PM)Massimo Gnerucci Wrote:  

(08-08-2021 07:05 PM)GreyUser Wrote:  The original tall key 41C’s were quite the homing pigeons and most made the trip back Corvallis more than once. It is exceptionally rare to find one in the wild with all original parts.

All of my TK 41s are working, with original parts.
Call me lucky.

I would be very surprised to learn that any 41C was still working with the original pink elastomeric cpu board connectors. The resistance new was usually around 1K and just like carbon composition resistors, the resistance goes up over time. The battery connection pin is the only one that matters since it’s the only one with any appreciable current being passed through it.