Available for sale are several new Norcomm NC109 notch filters, model NC109-A.  These are brand new units we received directly from the factory.

The Model NC109 is a high stability, audio notch filter and is designed to suppress a single frequency and pass all others. The NC109 is used where it is desired to reject a single tone from modulating a transmitter during the presence of voice and other tones in a voice plus tone control system. The NC109 comes in three versions: This sale is for the NC109-A, which is used in high frequency formats (800Hz - 3000Hz).  This unit features the following:

• Field tunable over its frequency range
• Immunity to RF
• Low current drain
• 12" colored flying leads
• High stability to prevent drift
• Selectable output impedance
• Operating voltage 6VDC to 24VDC
• Voltage regulated circuitry

For the complete specs, please check out the manufacturer's manual below.