Hi, what about using an SDR to micro adjust the 19.2 MHz crystal? I found that replacing the input capacitor (normally 18-27pF) with a reversed blue SMD LED seems to help. Simply pick an LED with the desired reverse capacitance and test. Also feasible: add a 10pF C0G as well if the frequency is too far off to trim in this way. https://www.newark.com/capacitor-types-and-performance
Note that most blue LEDs are light sensitive to UV so plan accordingly. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
