Thanks for the replies everyone!
@Grumpy_Mike - Your first idea is what I was thinking of because it allows you to use the tuner knob to the desired 'station', and then allows you to use to still use the mechanical memory buttons.
So for the circuit you described, does it matter how big the resistor and capacitor?
The radio has three coils, two have two separate wires wrapped around the cardboard tube, and the last coil is just one. I was going to use the last tube with the one wire wrapped around the tube and isolate it.
separte@zwieblum - I had looked at that circuit, but the schematics that I viewed also added an additional chip to get it to work.
I am going to try and post a picture..
