I am looking for an Icom FL-100 500hz CW filter to go in an Icom 706MKIIG I recently picked up. I tried the FL101 250hz filter in it and just don't like the way it sounds with that narrow of a filter, so would like to go back to the 500hz one (just sold one recently). Let me know if you have one for sale,and we can work out the details . 73 John AF5CC