An optional ressistor in series with gate output would be nice for reducing aberrations seen at a high impedance load at the end of a piece of 50 ohm coax.
Bruce > > On 24 December 2017 at 13:18 Bob kb8tq <kb...@n1k.org> wrote: > > 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. > _______________________________________________ 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.
