现代房屋建筑的电源线、电话线都是隐藏在墙内,要在墙外寻找暗线的位置,或迅速判断出断线电线的故障位置,是个比较棘手的问题。如果巧用晶体管收音机作查线器,对房屋装修工,电话、电气维护工来说,既不需要多少资金投入,又可提高工作效率,不失为—种比较实用的查线方法。 工作原理:当交流电源线、电话线通有交流信号时,便向空中辐射交变电磁场。电磁场对混凝土墙等物体具有一定的穿透能力,当收音机靠近交流电源线、电话线一定距离时,收音机中波段 Modern building power lines, telephone lines are hidden in the wall, to find the location of dark lines outside the wall, or quickly determine the location of the fault wire is a tricky problem. If you use transistor radios for wire checker, for home improvement workers, telephone, electrical maintenance workers, it does not require much capital investment, but also improve work efficiency, after all, a more practical way to check line. How it works: When the AC power cord, the phone line through the exchange of signals, it will radiate alternating electromagnetic fields to the air. Electromagnetic field on the concrete wall and other objects have a certain ability to penetrate, when the radio near the AC power cord, the telephone line a certain distance, the radio band