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Notes on Pickup Design and Response
Various factors influencing pickup response curves are discussed. Experimental results suggest that the high-frequency peak frequently seen on response curves of cantilever-type pickups is not the stylus-groove resonance, but a cantilever bending resonance. This resonance falls in the audio range due to the weight of the magnet or other material at the end of the cantilever. Torsional resonance gives a dip in response and is preceded by a peak. This peak is readily damped and goes unnoticed in rubber suspensions. Translation or differential curvature causes loss of treble. Deformation of the groove walls makes scanning loss of academic interest only at present.
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