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
| Attachment | Size |
|---|---|
| 4P Universal Crystal Filter.pdf | 1.03 MB |
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