S56A wrote: >It is difficult to achieve 1 kHz filter shape factor better then 1:3 at 9 MHz. http://www.qth.com/inrad/graphs/718.gif 1.6:1 shape factor with 1000hz bandwith at 8.2Mhz 73 & Happy Holidays, Barry N1EU __________________________________ Do you Yahoo!? New Yahoo! Photos - easier uploading and sharing. http://photos.yahoo.com/