Re: UBitx Crystal filter capacitor Q


Caps should be NP0 to have stable result. Filter itself very simple with flat responce but but still the skirt or shape is too great - it is better to do real 8-crystal filter as it is not so difficult. I did so and got 2.5 filter/6dB near 2 shape/60 db. Caps were 68 to 82 on small experimental board. Best regards George RX3ARG/UR4CRG

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