ACARC's first callsign was KF4NNV. Roy Tyack, one of the charter members of ACARC and an active member of club held the callsign W4YSB. Roy became a silent key in 1994. Shortly after that, the FCC opened up the vanity call system. Under that system, the club had to obtain a standard call (KF4NNV) but then could request any call that was open. In recognition of Roy's efforts and energetic support of ACARC, the club officers asked Roy's family if they could use his call as our club call. The family graciously agreed and the club requested and obtained W4YSB.