need simple microphone pre-amp opamp circuit

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I have to throw together a simple op-amp based electret microphone
pre-amp circuit on the road (limited access to hardware) - yes I feel
like Mcguiver.
I have access to a LM357 op-amp that I need to use with a single 6v
supply.
Anyone have a simple circuit that will work with a single supply
powered op-amp?
Thanks

 

[Phil Allison]

I have to throw together a simple op-amp based electret microphone
pre-amp circuit on the road (limited access to hardware) - yes I feel
like Mcguiver.
I have access to a LM357 op-amp that I need to use with a single 6v
supply.

** Don't you mean the LF357 ?

Anyone have a simple circuit that will work with a single supply
powered op-amp?

** Although this op-ap is not spaced by Natsemi to operate with less than
+/- 5 volts supply - it will still function with reduced specs with a 6
volt single supply.

Just use a standard inverting amp stage and bias the + input to 3 volts.

Suggest the input resistor be 3.9 kohms and the feedback a 250k ohms pot.




........ Phil

 

[Walter Harley]

I have to throw together a simple op-amp based electret microphone
pre-amp circuit on the road (limited access to hardware) - yes I feel
like Mcguiver.
I have access to a LM357 op-amp that I need to use with a single 6v
supply.
Anyone have a simple circuit that will work with a single supply
powered op-amp?

Google for "opamp electret mic preamp" (without the quotes).