Hi
> On Jun 8, 2017, at 2:18 AM, Hal Murray <hmur...@megapathdsl.net> wrote: > > > kb...@n1k.org said: >> The crystal enclosure may (or may not … who knows ..) be back filled with a >> low level of helium. It does not take much of a backfill for conduction >> inside the crystal holder to dominate the heat transfer vs radiation >> transfer. > > How does that compare with conduction through the mounting? That depends a bit on the package (HC-6 vs TO-5 etc). The number of blank mount points gets into it (2 point vs 3 vs 4 vs who knows). The thickness of the mount is the last thing I can think of on the list. A tab mounted rectangular blank will have a *lot* of mount conduction. A 2 point spring mounted HC-6, not so much. The simple answer is that the backfill is done because it does matter in a lot of cases. Bob > > > -- > These are my opinions. I hate spam. > > > > _______________________________________________ > 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.
