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一个可靠的功能完善的调谐系统是保证发射机射频系统正常工作的重要条件,DF100A短波发射机的调谐系统是定点预置的,共有10个频道,使用某一个频道时,调谐系统自动将各调谐部件调整到预置的位置。调谐控制主要由调谐控制定时器(6A2A1板)、调谐控制元件和调谐控制继电器(6A2K24、6A2K25)三个部分组成,而从调谐控制定时器外部电路来看,调谐控制定时器是调谐系统的核心元件。
A reliable and well-functioning tuning system is an important condition for ensuring the normal operation of the transmitter radio frequency system. The tuning system of the DF100A short-wave transmitter is fixed-point preset with a total of 10 channels. When using any channel, the tuning system automatically adjusts each tuning The parts are adjusted to the preset position. Tuning control is mainly composed of tuning control timer (6A2A1 board), tuning control components and tuning control relay (6A2K24, 6A2K25) three parts, and from the tuning control timer external circuit, the tuning control timer is the core of the tuning system element.