Did it occur to anyone that possibly these units where intended to be used in some very cold country, like the top of Alaska or some similar place wheere a little additional help was necessary ? ? ?
Just a thought . . . Bill....WB6BNQ Ed Palmer wrote: > > Date: Sat, 19 Jul 2008 20:35:38 -0700 (PDT) > > From: "Rick Karlquist" <[EMAIL PROTECTED]> > > Subject: Re: [time-nuts] Double ovened 10811-60158 on ebay > > To: "Discussion of precise time and frequency measurement" > > <time-nuts@febo.com> > > Message-ID: > > <[EMAIL PROTECTED]> > > Content-Type: text/plain;charset=iso-8859-1 > > > > Mike S wrote: > > > >> At 05:33 PM 7/19/2008, wje wrote... > >> > >>> Another thing, the 10811B in mine doesn't have a removable endplate, > >>> it's soldered. This makes it a lot more difficult to adjust or > >>> repair. > >>> Still, I think it's a fine buy for the cost. > >>> > >> Well, yea. Maybe Rick Karlquist will pipe in, but I believe that (other > >> than temperature, which is obviously well controlled by a double oven), > >> pressure/humidity are the biggest instability factors. Soldering the > >> case closed mitigates that. > >> > > > > Right. Without hermetic sealing, the double oven would be negated > > by humidity effects. I tried to discover exactly what component > > was the major humidity "sensor" in the 10811, but was never able > > to narrow it down to anything specific. The crystal is not the > > humidity sensor because it is hermetic in its own package, even in > > the non-hermetic 10811. > > > > Rick Karlquist N6RK > > > If their intent was to hermetically seal the oscillator, why would they > leave the screw in the front that covers the adjustment hole (which > nobody could possibly get to!)? Would the seal around the screw be good > enough to make it worth the effort to seal the rest of the unit? > > Ed > > _______________________________________________ > 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.
