dimensions suitable for positioning the transducer 2 39 within 2 u03bc 34 of the disk will be l x 0 006 34 l y 0 07 34 and l z may be selected to be 0 01 34 using these parameter values practice of the invention will allow recording to 60 000 bits inch fig5 illustrates the operation of the invention with the slider assembly 10 39 flying above the disk surface 37 and the magnetic transducer 2 39 positioned for recording or playback with the servo activated the height of the magnetic transducer 2 39 above the disk surface 37 is maintained by means of continuous servo action the magnetic transducer 2 39 serving the dual function of providing height information to the servo as well as the recording and playback of signal the magnetic transducer 2 39 is fabricated from a material such as mnzn ferite which has a resistivity of approximately 30 ohm cm and having such a relatively low resistivity the magnetic transducer 2 39 may serve as one plate of a capacitor the other plate of the capacitor is the metal surface 30 39 or alternatively and preferably the coating 32 could serve as one of the capacitor plates since it could be made conductive i e by means of an included metallic film or a modified binder system to effect conductivity the capacitance between the magnetic transducer 2 39 and the metal surface 30 39 or the conductive coating 32 is a measure of the height of the magnetic transducer 2 39 above the disk surface 37 an electrical connection 46 is made between the.