The part of electronics that is sensitive to EMP is the diode.

The diode is a germanium-silicon layer that is very sensitive. EMPs usually cause them to short.

Whether is is caused directly to the diode or the entire circuit acting like a collector feeding the pulse to the diode I am not sure.

Inductors (coils) and capacitors or not as sensitive and might stand up better.

I know little else on this. What I do know is that the B-52, intended to be a nuke dropper, used a lot of tubes instead of diodes.

Don't throw out grampa's old radio yet.