Hi If you look at the thermal conductivity vs very low pressures, the conductivity comes up pretty quickly from a hard vacuum. There is essentially no impact on Q.
Bob > On Jun 8, 2017, at 4:03 PM, Attila Kinali <att...@kinali.ch> wrote: > > On Thu, 8 Jun 2017 06:55:07 -0400 > Bob kb8tq <kb...@n1k.org> wrote: > >> The simple answer is that the backfill is done because it does matter in a >> lot of >> cases. > > This raises the question, why there is backfill (just for thermal > conductivity?) > and how much it affects the Q of the crystal. > > Attila Kinali > > > -- > You know, the very powerful and the very stupid have one thing in common. > They don't alters their views to fit the facts, they alter the facts to > fit the views, which can be uncomfortable if you happen to be one of the > facts that needs altering. -- The Doctor > _______________________________________________ > 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.