Hi There’s a lot of debate out there about that.
When used as a variable resistor (two terminal device) there is no doubt that a sereis resistor can help. When used as a voltage divider (three terminal device) the claim by the pot manufacturing OCXO companies is that you are better with no added resistors. The material in the pot is all same / same and the TC as a divider is quite low. Yes, there are other opinions out there ….. Bob > On Dec 23, 2017, at 6:57 PM, Mark Sims <hol...@hotmail.com> wrote: > > Looks good and quite useful. > > If you ever re-spin the board, I would recommend including a place for range > limiting resistors on the ends of the EFC adjustment pot. That way they can > be low TCR resistors and the TCR effects of the pot can be minimized and the > EFC adjustment can be made less twitchy. But, at the expense of possibly > needing to tweak the range resistors as the oscillator ages. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
