Hi there, I do have space on the PCB, but I am worried that the ceramic as well as ferrite cores both are sensitive to vibration. I will try Joe's idea of using a doorbell buzzer to introduce vibration. It's not easy to generate 1KHz vibration without professional (and heavy) equipment :) Another suggestion was to put the part on a scope, and lightly tap it, to see any variations in voltage. It's time to experiment. If anyone knows a good inductor-series (leaded or smt) that is known-insensitive to vibration please let us know! Thanks, Said In a message dated 4/13/2010 06:34:53 Pacific Daylight Time, [email protected] writes:
Said, I assume you are using something like the Coilcraft 0603 LS series which seem to have ferrite cores. You might want to try a 0805 size part since that inductance is available in the CS series which are ceramic only. I don't know if size constraints prohibit using an 0805 but you can try one to see if the inductor is the problem.If you must use a 0603, you might try massaging the filter impedance so you can use a 390 nH which is available in 0603 size with a ceramic core. Then, you will either have to put up with a mismatch or include some impedance matching components. I use the LS series 0603s a lot and they are somewhat temperature sensitive if that could be an issue. The ceramic cored CS series don't seem to be temperature sensitive. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
