The OM 78 is a is a magnetic cartridge (MM) with a 65µm spherical stylus that is perfect for playback of 78rpm records, which require a larger stylus profile for proper playback.
Output voltage at 1000Hz, 5cm/sec. 4 mV, lateral (mono) Frequency range at -3dB 20-15,000 Hz Tracking ability at 315 Hz at recommended tracking force 70 Compliance, dynamic lateral 15 µm/mN Stylus type Spherical Stylus tip radius R 65 µm Tracking force range 1.8-2,5 g (18-25 mN) Tracking force recommended 2.0 g (20 mN) Tracking angle 20° Internal impedance, DC resistance 750 Ohm Internal inductance 450 mH Recommended load resistance 47 kOhm Recommended load capacitance 200-600 pF Cartridge weight 5 g Replacement stylus unit STYLUS 78