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如何判断录放磁头是否要消磁录音机的录放磁头经过长期使用,或者由于放大器发生故障,或者和带磁性的物体接触,都会带上磁性。磁头带了磁,放音的时候会出现嘘声噪音,严重时会使高频特性降低,杂音增加。检验磁头是不是带了磁,可以找一根不带磁性的缝衣针,用线吊起来,使针靠近磁头。如果磁头能把针吸引过去,说明磁头带了磁。为了消去磁头上的磁性,需要用消磁器。(摘自《青年无线电手册》)
How to Determine Whether the Recording Head Should Demagnetize The recording head of the tape recorder should be magnetic after prolonged use or because of an amplifier failure or contact with a magnetic object. Magnetic head with a magnetic, playback time will be booed noise, severe high frequency characteristics will be reduced, increased noise. Check the magnetic head is not with a magnetic, you can find a non-magnetic needle, hanging up with a wire, so that the needle close to the head. If the head can attract the needle past, indicating that the head with a magnetic. In order to eliminate the magnetic head, the need to use demagnetizer. (Excerpted from Young Radio Manual)