No, the circuit in post #43.The circuit in your posted #73, you can adjust the R2 to adjust the sensitive, you can also adjust the R3, but you only can adjust a little bit range.
Op-Amp Microphone Preamp, using the specific IC is better, but you also can using LM358 to do the experiment.
I have used a non-inverting amplifier but didn't work (+ an potentiometer to change the gain). are you sure about the circuit you posted?
Hey dude! how you doing!I need to clarify objectives. What is the voltage? What a load? Battery power or not? Whether the economy?
Voltage 3-9v
if we assume the load is my speaker then an 8ohm speaker.
more probably yes. the supply is battery.