Magnetic Core Crossover Inductor Distortion Testing
Part 2
Harmonic Distortion Sweep at 20v into 4 Ohms (~100w)
Amplifier measurement for baseline distortion reference.
Altec Lansing 9444B amplifier in bridged mode used for the sweeps at this level. Amplifier connected directly to the 4 ohm bench test load.
Amplifier a bit noisy at low frequencies but was much cleaner in the midrange then the NU3000 at this level which is why I used it here.
Dayton 1.0mH 18 Gauge Air Core.
Again no distortion is generated from this inductor itself.
The low pass effect of the inductor filters out some of the harmonics from the amp as well as reducing current/power at high frequencies which is why you see distortion is lower then the baseline amplifier measurement.
Noise floor is higher due to the lower SNR at those higher frequencies (low pass effect).
Erse Audio 1.0mH 18 gauge Laminated Steel I-Core.
Saturation is not occurring at this level.
Erse Audio 1.0mH 16 gauge Laminated Steel I-Core.
Saturation is not occurring at this level.
Erse Audio 0.8mH 16 gauge Laminated Steel Super-Q Inductor.
Saturation is not occurring at this level.
Jantzen Audio 1.0mH 15 gauge P-Core Inductor - Permite (ferrous powder).
Saturation is not occurring at this level.
Jantzen Audio 4.7mH 14 gauge C-Coil Toroidal Inductor
Saturation is not occurring at this level.
Random 3.5mH 18 gauge Laminated Steel I-Core.
Saturation is not occurring at this level.
Random 1.5mH 22 gauge Laminated Steel I-Core.
Saturation is not occurring at this level.
Random 0.52mH 22 gauge Ferrite Core.
Heavy saturation occuring at this level.
Random 7.5mH 20 gauge Ferrite Bobbin.
Heavy saturation occuring at this level.
