TDK MA

Magnetic Particle: Finavix

Coercivity: 1130 Oe
Remanence: 3200 Gauss
Squareness Ratio: 0.84

Operating Bias: +0.5dB
MOL 315Hz: +6.0dB
MOL 10kHz: 0.0dB
Sensitivity at 315Hz: +1.0dB
Sensitivity at 3.15kHz: +1.5dB
Sensitivity at 10kHz: +2.0dB
Sensitivity at 16kHz: +2.5dB
Bias Noise: -58.0dB

TDK MA was a "work-horse" of type IV cassettes. The formulation is based on Finavix particle. It appreared first around 1979.