Apparatus for variable speed playback of plural track records

摘要: An apparatus for playback of plural tracks recorded information at selectively different track record speeds, the consisting a unit capable playing back selected one each carrying control signal predetermined, constant frequency, and having circuitry receiving converting it to DC voltage proportional frequency use in controlling speed unit. The is applied through nonlinear network drive amplifier which, turn, regulates forward motor maintain played-back its proper reference value.