With a Boyer MKIII, a 12 Volt Dina Coil, and a Podtronics charging system, do I need to add a condenser somwhere? What exactly does a small little condenser do? Where does it plug into?
You should not need a capacitor (FWIW condenser is an obsolete automotive term for capacitor).
A capacitor functionally is akin to a air storage tank.
IE if you put air volume (current)in under pressure(voltage) and then remove the pressure the air comes back out.