Zenith 7S558

[Electronic M]

The wave magnets are the next best thing to a long wire. You do not connect the long wire the the chassis, but rather an antenna terminal. The set may also have a ground terminal THAT is where you would connect a ground. A long wire may help with "DX" long range listening, and a ground may help, but unless you are in the exact middle of nowhere they should not be needed for local/regional reception. An antenna is more beneficial than a ground in most cases. If you plan to use a ground make sure (with the set on) there is no measurable voltage between the ground terminal of the radio and the ground you want to connect the radio to.