1.磁头的识别 (1)单声道、双声道磁头的识别 单声道磁头内部只有一组线圈铁心结构,由两个引脚引出内部线圈,双声道磁头有两组线圈铁心结构,故有四个引脚,而抹音磁头一般情况下是不分声道数的。 (2)录、放磁头和抹音磁头的识别录、放磁头需防止外界杂乱信号干扰,故采用金属外壳。而抹音磁头一般采用黑色或白色塑料外壳封装。 (3)交流抹音和直流抹音磁头的识别 交流抹音磁头,因工作电流是几十千赫的超音频电流,为了有足够的抹音电流,故线圈匝数少、线径粗、其直流电阻一般为50Ω左右。直流抹音磁头,因工作电流是 1. Head Identification (1) mono, two-channel head recognition Monaural head inside a single magnetic core structure, the two leads to the internal coil, two-channel head has two sets of coil core structure, Therefore, there are four pins, and wiping the head is generally the case regardless of the number of channels. (2) recorded, put the head and wipe head identification records, put the head to prevent clutter from outside interference, it uses a metal shell. The wiping head generally use black or white plastic package. (3) AC wiping and DC wiping head recognition AC wiping head, because the working current is tens of kHz ultra-audio current, in order to have enough wiping current, so the coil turns less, the diameter of coarse, its DC resistance is generally about 50Ω. DC erasing head, because the working current is