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将一台袖珍10波段收音机增加两个元件,便使它成为一台能接收1～5频道电视伴音的接收机。 10波段收音机是一种高性能收音机。该机采用了一块索尼公司生产的CXA1019P单片收音机专用集成块,电路调频部分采用宽带放大如图1所示。根据这一特点,可在该机集块⑦脚即FM本振处加装一只微型开关.将原FM本振线圈L焊下,改换自制线圈L’代替,一次即改成功,经实际使用,效果极好。
The addition of two components to a pocket-sized 10-band radio makes it a receiver that can receive 1 to 5 channel TV sound. The 10-band radio is a high-performance radio. The machine uses a Sony CXA1019P monolithic radio special integrated block, part of the circuit using broadband FM amplification shown in Figure 1. According to this feature, a micro-switch can be installed on the foot of the machine block ⑦ FM local vibration. The original FM local oscillator coil L welded down, replace the homemade coil L ’instead, one that is changed to success, the actual use , The effect is excellent.