[TV MAN]

Mine is an older Isotap 400w, 4a transformer that I have powered about anything electronic you can immagine. I dont think a radio would even test the limits of either of those you are looking at. They are a pretty good idea, esp on those ac/dc sets where one side of the a/c line is connected to the chassis. In addition, you may want to also consider a variac transformer, but not as a substitute for an isolation transformer.