Since 1980, Lemon Grove-based California Aircheck has offered 60- and 90-minute audio tapes featuring vintage local radio broadcasts (DJs only, no music) that may be purchased individually or by yearly subscription. New tapes are produced monthly and many selections are now available on compact disc. Tapes include '60s "Boss Jock" Steve Jay spinning platters on the long-gone KGB-AM "Boss 30" program, 1969 selections featuring Happy Hare on local KCBQ-AM (KGB's chief rival in the late '60s), as well as segments spotlighting classic rock DJs such as Les Turpin and Bill Wade. "We have hundreds and hundreds of hours of current and classic radio segments in the vault," says owner George Junak, who counts among his former employers local "modern rock" station 91X. Tapes sell for $11 each.