Antennae Boy

From Who's Who in the Legion of Super-Heroes 1:

Antennae Boy was one of the many applicants who were on hand to try to fill the empty slot left by Lightning Lad's "death." He was rejected because his power| the ability to pick up radio waves transmitted from anywhere on the planet| from the present or past| was imperfect| often resulting in deafening feedback squeals. This same ability| however| brought him to the attention of the researchers at the Metropolis Time Institute| who are using his power to collect ancient recordings to add to their body of historical knowledge.