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随着立体声盒式录音机向着高保真度的方向发展,对于左右音质的关键部件的磁头,迫切要求提高它的性能。这些性能主要为:频响、信噪比、失真和灵敏度。在4.75厘米/秒低带速下,要保证10千赫以上的频响,必须实现录音信号的记录波长小于4.75微米以下的所谓短波长记录,并采用矫顽力(Hc)更大的二氧化铬磁带。结果,磁头缝隙变狭以后,在磁头录音时,由于缝隙部分的非线性饱和现象,产生录音信号的失真。本文介绍了为探讨这种失真现象的原因而作的实验研究及相应的措施。
With the development of stereo cassette recorders towards high fidelity, there is an urgent need to improve the performance of heads of key components for left and right sound quality. These performance are: frequency response, signal to noise ratio, distortion and sensitivity. At 4.75 cm / s, at low belt speeds, so-called short-wavelength recording of recording signals at wavelengths below 4.75 microns must be achieved to ensure a frequency response above 10 kHz, and the use of larger dioxins for coercivity (Hc) Chrome tape. As a result, after the head gap is narrowed, the distortion of the recording signal occurs due to the non-linear saturation of the slit portion during head recording. This article describes the experimental study and corresponding measures to explore the causes of this distortion phenomenon.