Boy, if you're confused, that's not good. Okay, let's see if I can explain this. Since this is my son's plane and I'm just a beginner, I'm not really sure about the workings of all of the systems. There are three fuses labeled radio. My son has in the past removed one (third one) and upon putting it back in the VOR has returned to life. If it's not the VOR, what would it be?