这里介绍的放大器音质较好,成本低廉。它除了直接与录音机输出端(一般从耳机插座输出)相配接外,还可与晶体唱头电唱机配合使用。本放大器使用5G37集成电路块(见图1)。对处理品而言,要注意两个问题:一是电路接好后加电时,要对“6”脚电压进行测量,其值为电源电压的1/2,有偏差可略调整R_1。 图1线路可直接用φ3.5mm耳塞插头接上屏蔽线, Amplifier introduced here, better sound quality, low cost. In addition to its direct connection with the recorder output (usually output from the headphone jack), it can also be used in conjunction with a crystal record player. This amplifier uses a 5G37 integrated circuit block (see Figure 1). Processed products, pay attention to two issues: First, the circuit is connected after power, the voltage of the “6” pin to measure the value of the power supply voltage of 1/2, with a slight deviation can be adjusted R_1. Figure 1 line can be directly connected with φ3.5mm earplugs shielded cable,