I have a Kenwood YK-88C 500 hertz CW filter for sale if you know of anyone that might be interested. It works in several Kenwood models; 950, 940, 850, 440, etc... Danny NG9R --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.417 / Virus Database: 233 - Release Date: 11/8/02