Gang: For Sale = W9GR DSP filtre. This is the original version, works very well. Runs off 12 VDC. Ten selectable modes. Offers de-noiser, signal peak, signal notch, HF Packet/RTTY, and a range of CW filtres down to 30 Hz width (sic). Unit is in excellent condition. New lower price = $50.00 including shipping and documentation to your CONUS address. 73, --Doc/K0EVZ