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磁石式电话机在使用中机械易于磨耗,维修零件难以补充,不能满足工作的需要.我们在研究改进磁石电话机的工作中,试验过几种方案,都是采用了新的“电子开关”电路,利用直流或交流呼叫,打开对方的“电子开关”以驱动直流铃或低压交流铃(自制),或直接控制集中铃流器,产生25赫交流信号,送至线路上以驱动原交流铃,从而取消了磁石发电机具有效率高、没有机械磨耗、便于维修、不易发生故障等优点.经过实际运用,几年来未更换过零件,颇受维修和使用单位的欢迎.现简单介绍如下:
Magneto-phone in the use of machinery easy to wear, repair parts difficult to supplement, can not meet the needs of work.We study the improvement of the magnet phone work, tested several programs are using a new “electronic switch” circuit , Use the DC or AC call to open each other’s “electronic switch” to drive the DC bell or low voltage AC bell (homebrew), or directly control the centralized ring device, resulting in 25 Hz AC signal sent to the line to drive the original AC bell, Thus eliminating the magnet generator has the advantages of high efficiency, no mechanical wear, easy maintenance, easy to failure, etc. After the actual use of the past few years have not replaced the parts, very popular with the maintenance and use of the unit welcome.A brief introduction is as follows: