The OM 78 is a magnetic cartridge (MM) with a spherical needle 65µm that is ideal for playing 78rpm records, which require a larger needle profile for proper playback.

TECHNICAL SPECIFICATIONS

• Output voltage at 1000 Hz, 5cm/sec: 4 mV, Lateral (mono)
• Frequency range at -3dB: 20-15,000 Hz
• Tracking ability at 315Hz: 70 µm
• Compliance, dynamic, lateral: 15 µm/mN
• Needle type: Spherical
• Stylus tip radius: R 65 µm
• Tracking force range: 1.8-2.5 g (18-25 mN)
• Recommended tracking force: 2.0 g (20 mN)
• Tracking angle: 20°
• Internal resistance, DC: 750 Ohm
• Internal inductance: 450 mH
• Recommended load resistance: 47 kOhm
• Recommended load capacitance: 200-600 pF
• Cartridge color, body/stylus: Black/Black
• Cartridge weight: 5 g
• Replacement stylus unit: Stylus 78