I have a custom built 700Hz CW/RTTY/Digital mode 8 pole filter from the latest INRAD order made by Gary KI4GGX in May 2016 available for sale. It is in original box, never installed. I bought two; really only needed one. Original cost $152 shipped USPS. Available for $130 shipped USPS Priority Mail. PayPal is Okay. Ralph w1ZK