Folks,

Attached is a multi page PDF that contains a schematic and PCB layout for a 4 pole Universal Crystal Filter. You will notice it also has provisions for impedance matching using L Networks.

The PDF should be sufficient to build from, but, the information was done in Novarm's freeware version of DIPTRACE. I highly reccommend DIPTRACE. It is more robust and bug free as compared to some of the other freebies available.

With a little "Cut/Copy and Paste" you can extend the design to more or less poles.

Let me know if you have any questions.

GL and have fun!!!!!!, Bob WA!FXT