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Ortofon OM 78 Phono Cartridge
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.
OM 78 Technical Data:
Output voltage at 1000 Hz, 5cm/sec.: 4 mV, Lateral (mono)
Channel balance at 1 kHz
Channel separation at 1 kHz
Channel separation at 15 kHz
Frequency range: 20-15.000 Hz
Frequency response
FIM distortion at recommended tracking force, DIN 45.542
Tracking ability at 315Hz at recommended tracking force: 70 µm
Compliance, dynamic, lateral: 15 µm/mN
Stylus type: Spherical
Stylus tip radius: R 65 µm
Equivalent stylus tip mass: 0,5 mg
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 colour, body/stylus: Black/Black
Cartridge weight: 5 g
Replacement stylus unit: Stylus 78
Details on Ortofon Cartridge and Stylus Installation and Maintenance
A Brief History of Ortofon
Ortofon Stylus History Chart
Ortofon OM Series Product Literature PDF
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