Oscillator for Bias and Erasing Recording Heads (CB1516E )

    This circuit was found in a 1976 documentation. It can be used with old tape recording mechanisms for media recovery. It erases and polarizes the tapes. The transistor may be the BD135.     This circuit was found in a 1976 documentation. It can be used with old tape recording mechanisms for media recovery. It erases and polarizes the tapes. The transistor may be the BD135.