You need an equalizer in the amplifier line.

Regards
Gary K4FMX

On Sun, 23 Apr 2006 21:52:03 -0400, "James Thompson"
wrote:

Has anyone got a good but cheap circuit to eliminate or surpress feedback.
Im making my son some low power fm mikes to use in his church, but they get
feedback real easy. Is there a simple notch filter per say that I can add
the the mike section of this. My pcb is only 1.5 by 2" right now. Thanks.