Filters that are used in various Ten-Tec Transceivers; 288 1.8kHz, 285 500 Hz, 282 250 Hz: $65 each including shipping, $185 for all three including shipping. Payment by USPS Money Order. Bill Jennings, W4UNP 630 Whitepine Drive Catawba, SC 29704 Voice: 803-329-9095 E-Mail: w4unp at comporium.net