At one time that sounded wonderful. Music over the air. Wow.AM radios sound awful. Most high audio frequencies are missing like on an old phone.
Sorry about the slip. Kilocycles remained long after electronics stopped using condensers. And I never could figure out why condensers were used in electronics, when they were providing capacitance. But that would be a completely different discussion.Note for youngsters: kc = kHz
I was thinking a larger ferrite rod loopstick might increase signal, because the rod acts as the antenna.Mostly, a single rod is used because it is cheapest and adequate for most. Also, with a reasonable number of turns the inductance will be correct to resonate at the desired frequency. So that is how the loop-stick for a common consumer broadcast radio is selected. Other applications may require alternate arrangements. The size and amount of core will affect the inductance per turn, and that will often affect the performance of the radio.