could anyone give me a shotgun amp circuit for long range listening? is it really possible to intercept a conversation at 100 feet? i made a few amps but, the background noises are overriding it. like birds,wind etc. are there any filter circuits ? please help.
Any low noise opamp makes an excellent mic preamp.
If sounds from birds and wind cause interference then a highpass filter will remove some of the wind rumbling sounds and a lowpass filter will remove some of the bird sounds leaving you with sound like a telephone.