A dynamic microphone has a fairly low impedance of about 600 ohms. The input impedance of the preamp should be about 2k ohms for very low noise. The input impedance of your preamp is too high.
If the supply is 18V then you want a symmetrical output swing so the idle collector voltage of TR-2 should be about +9.5V and the emitter voltage should be about 1V. The collector and emitter currents are (18V - 9.5V)/15k= 567uA. Its base current is listed on its datasheet and is supplied by R2 which also provides collector current to TR-1.
You do the calculations for TR-1.
I was taught to never ever bias a transistor with a single resistor from the supply to its base because the beta of a transistor is a range of numbers, not a single number.
So can you teach me comple this schematic , please fix it for me ,,you can change some thing . this question 2 year ago but upto now i can't build 1 simple schematic , i studying university but no one help me do it
So can you teach me comple this schematic , please fix it for me ,,you can change some thing . this question 2 year ago but upto now i can't build 1 simple schematic , i studying university but no one help me do it