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. Why do you need gain to be so high?
Thanks everyone for answering
MikeMl I understand most of what you did but what do you recommend
for input and output caps values. Is bigger better?
Is there a better option instead of 741 for better gain bandwidth plot
and what is the most usual?
A gain of 100 is plenty to hear a heartbeat from an electret mic in a shallow cup made from a jar lid. But if you want to hear a heartbeat 10meters away or more then you need lots of gain, maybe 1000.