I have a small transmitter that I use for monitoring my property. It has a sensitive electret mic that feeds the transmitter, but the problem was that it does not have AGC, which is desired due to loud sudden disturbances that sometimes occur. The system has 26 dB gain already, so anything loud coming over the receiver blasts me out of my chair.
I recently came across these:
shorturl.at/jwCZ0
I came across a video where the module was installed into the microphone of a transmitter to allow increased audio gain and thought it might be perfect for my situation too. In the video, he mentions the tremendous gain increase, but uses a variable resistor on the output to reduce it which is what I would do as well. I do have a question though: since I am replacing an existing electret which already has voltage for its bias, what would I need in the audio line going from transmitter to the now module, a bypass capacitor in the positive line leading from transmitter to module? Assuming so, what value and type?
Thank you.