ECS 9MHz fundamental microprocessor crystal, 25deg C, HC-49USX ( QC49S ), Series Resonant, +/-50ppm.

Closely matched in manufacture so ideal for constructing crystal filters. Measured Cm using G3UUR method with a 5pF holder capacitance typically 9.25 fF

For more information please see the ECS HC-49usx Data Sheet

We can now offer matched sets of either 5 or 8 crystals suitable for crystal filter construction.  The series resonance of crystals are selected within 20Hz, and the Q is selcted to be in a range of +/- 10000.  Select in the Crystal matching option.

For typical performance of these crystals used in filters, please refer to the EME203 Crystals Filter Kit webpage.