With core reference to the U.S. radio amateur/ham designation YL, instituted in 1920 by the American Radio League to designate a female operator, and amateur operator Clara Reger's subsequent YL33 code, coined especially for women communicating with other women, a salutation "considered sacred by female hams", Radio 33 recognises these historic women as kin and forebears, as well as the ongoing work it has taken, in the past and the present, for such voices to claim audible space, as - and for - themselves.