According to the principle of low forward resistance and high reverse resistance of P-N junction
After finding the discrimination base for the emitter atransistornd collector,
If it is an NPN transistor, simply swap the meter rod for measurement,
If the resistance value is around 30 kn, it can still be used.
The so-called feedback refers to taking a portion of the output signal from the amplifier and sending it back to the input terminal through a certain method,
So positive feedback amplifiers are commonly used in simple receivers with low quality requirements.
