Hi I have for sale two INRAD cw filters. INRAD # 528 500HZ for 455 khz IF INRAD #22 250HZ for 8830 IF. Current price for 500HZ #528 is $155.00US Current price for the 250HZ is 98.00US Asking 110.00 $ can for the NR 528 and 75.00CAN for the nr 22 I have also 2 kenwood YK-88c-1 for sale at very good prices. Thanks NOEL