I have designed a Band Pass Filter Board. The board is 1.5" by 3.5". The layout includes 6 bandpass filters that can be up to 7 pole elliptic. The filters are switched by 2 cmos analog data selectors(FST3251). The filters are selected with 3 CMOS data lines which have pull-up resistors on-board to allow either mechanical switches or a processor to be used. The board also has a transformer on the input. My website has all the info include designs for 6 filters which cover from 1.8 to 30 MHz. Click the "BPF" tab on the side. I will sell the boards for $8(USA) or $9(outside USA) postpaid.
Dave - WB6DHW <http://users.wildblue.net/wb6dhw>
