I have the following Tentec Filters for Sale: Model 285 500 Hz, 6 pole CW filter (6mhz) $70 Model 288 1.8 kHz, 8 pole SSB filter (6mhz) $70 Model 216 500 hz 6 pole RTTY Filter (9mhz) $70 Please contact me direct - lejeuned at centurytel.net or call me (337-734-4556) Dave K5WNV