Who has a Cs standard I can buy. ? Ulrich Sent from my iPhone
> On Jul 10, 2015, at 3:17 PM, "John Miles" <[email protected]> wrote: > > >> Few people need the CS on all the time. The other funny thing on the HP >> series you can turn the tube off and just use the OCXO after its been >> adjusted accurately. >> I run my HP 5065a Rb the same way. Power as needed and every 6 months. >> So you are very lucky to have a good CS. > > Rbs are a bit different in that they need time to stabilize. Shortly after > you turn on a Cs standard it is as stable as it will ever be, but a 5065A or > other Rb will often need at least a couple of days to achieve its best > stability. So I leave my 5065As on all the time but I only run Cs standards > when needed. They are left plugged in to keep the tube pumped down with the > beam current shut off. I had to modify my 5062C to allow that by adding an > extra switch, and IMHO you should do the same thing with the 4060 if it > doesn't already have a standby mode. > > You don't have to power up the whole thing periodically as long as the ion > pump is left running 24/7. I've seen a couple of cases where the tube has > failed due to an open hot-wire ionizer filament so I prefer not to turn mine > on all the way except when they're needed, or as a (very) occasional check. > > -- john, KE5FX > Miles Design LLC > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
