What is the effect of the C-field coil dimension tempco? At some point this will surely dominate overthe coil current tempco.
Bruce > > On 22 November 2017 at 09:16 Charles Steinmetz <csteinm...@yandex.com> > wrote: > > Luciano wrote: > > > > > > what you refer is the resistance relation referred to the LM299 > > source around 14VDc but you have to consider > > the tuning range of the pot, in the original HP5065A is 2E10-9. > > Of course, it depends on the setting value of the variable > > resistance, but you have to consider a possible variation of 20PPM/c on > > 2E10-9. > > > > > > No, you don't. The tempco that matters is the aggregate tempco of the > series string. Only a very small portion of the string voltage appears > across the pot, so a 20ppm tempco of that small part will cause a much > smaller change in overall tempco of the series string. > > Perhaps Corby will tell us what value the pot is, and then you can > calculate the aggregate tempco of the string at various pot settings and > see for yourself. > > Charles > > _______________________________________________ > 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.
