How many BJT direct-coupled transistor amplifier stages are needed to pick up very weak signals (less than 1/2 as loud as a soft whisper)? If I should use resistors, please specify where I should put them in the circuit and why.
What frequency radio signal? AM or FM? What do you mean by ' transistors that *accept* 100mA'?mstechca said:I'm trying to amplify a weak radio signal. I have transistors that accept a maximum of 100ma current. How much current should the transistor accept for radio frequency?