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i m using 4558
and yes it was close to the positive supply voltage
i m not looking for gain here, i m looking for the use of mic between the op amp dual supply vs the single supply
i checked now to be sure again and in the single supply opamp ,there was no clipping in max gain and no...
my bad of understanding
i did that ,put the resistor, and it worked. kinda.
the problem- it doesnt get the max gain.
gain resistors are 100k and a variable resistor(vr)
when the vr exceeds the 500 ohm the signal disappear and- will comes back distorted if i raise my voice
in the single supply...
but there is a resistor from the ground to the input( i don't care about the gain in this stage i just want it work first) ,and it operates on dual supply with -vcc.
the circuit works with a radio signal but not with a mic signal
i m trying to build a mic pramp with opamp, but from some reason it only works when the opamp is a single supply.
simple noninverting opamp dual supply, amplify fine a signal from the radio, but when i connect an electret mic(with 10k resistor bias to the +vcc)
it dont work:banghead:
but when...
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