论文部分内容阅读
随着调频立体声广播的发展,愈来愈多的地方发展调频广播。但由于一些地方的中、小台资金不足,因而只有50W或100W的小型调频发射机。这种小功率的发射效果往往不能满足听众们的要求,于是,我台工作人员在现有的条件下,积极想办法,对1kW伴音发射机进行了改革,收到了效果。这样,就产生了对彩色发射机进行改装的设想,这种设想在实践中得到了验证,并使功率在只有40W的前级推动下达到了750W。对我们改装的一些方法简述如下。一、调整其输入回路因为彩色发射机末级是发射时的激励信号
With the development of FM stereo broadcasting, more and more places develop FM radio. However, due to lack of funds in some places, small and medium sized, only 50W or 100W small FM transmitters. This low-power launch effect often can not meet the requirements of the audience, so my staff in the existing conditions, actively think of ways to 1kW sound transmitter has been reformed and received results. This led to the idea of retrofitting color transmitters, a concept that was validated in practice and brought power to 750W at a pre-stage power of only 40W. Some of the methods we modified are outlined below. First, adjust the input circuit because the color transmitter last stage is the launch of the excitation signal