Happy Thanksgiving!!! I have an INRAD filter #93 455.0 kHz 1.8 kHz BW for TS-850/950/450/690 available for ½ price. Untouched by human hands ..even still. http://www.inrad.net/product.php?productid=20 <http://www.inrad.net/product.php?productid=20&cat=56&page=1> &cat=56&page=1 73, Lee, KØLW