Reading old HP-65 program cards

[albertofenini]

That’s not a standard socket
The usual socket is a single rectangular shaped hole with the pins
Here it looks like there are two although thinner holes rather than only one
May be they where using a different connector or the inside was modified
If they had to plug-in and plug-out wearing gloves the normal connector was probably not the most practical solution
I doubt it they were only running on batteries ...

(03-03-2021 04:08 PM)toml_12953 Wrote:  

(03-03-2021 03:09 PM)CY-CL Wrote:  This is really an interesting NASA HP-65 calculator. No connections plugs for the charger are present !!!!

I see the connection socket, right at the top where it should be.