Hi Doug, Most people use a notch filter circuit. A single or dual op amp makes a basic notch but to remove the tone to commercial radio specs you should use an improved circuit.
Email me off the list direct and I'll direct you to a place where you can download a circuit diagram and/or buy a low cost commercial notch filter board for a very fair price. cheers, skipp skipp025 at yahoo.com > "Doug Hutchison" <[EMAIL PROTECTED]> wrote: > Hi, > > Could anyone point me in the direction of a simple circuit which will > facilitate the muting or suppression of a 1750 hz tone on the received > audio. > > Thank you for reading....regards, Doug - GM7SVK >
