Elmer

Elmer
 n.— «Uncle Charlie was the first of the two brothers to be converted to ham obsession: K4NAV (Kilo4NovemberAlphaVictor)—he went on to design optics for deep-space telescopes. and my Great Uncle Bill Leatherman, W4YNQ, who introduced them both to the joys of amateur radio (in the parlance, he was an “Elmer,” an old-timer that takes young kids under their wing and passes on the ham radio obsession to future generations).» —“Coffee cake *and* ham radio – you mean I get BOTH?” by Jennifer Cox Discordis Apr. 15, 2005. (source: Double-Tongued Dictionary)