Excellent condition. Just unit and manual for sale. 12v power supply not included. JPS ANC-4 (Antenna Noise Canceller - 4) is an RF device designed to reduce locally generated electrical interference for radio receivers and transceivers, now exclusively manufactured by Timewave. It works by using a separate "noise antenna" to sample local interference and cancel it out by adding an inverted waveform to the main antenna signal.
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