Corby Congratulations on keeping the Maser going. Pretty amazing. You should check it against wwvb to make sure its accurate. Chuckle. Regards Paul WB8TSL
On Mon, Jan 2, 2017 at 2:42 PM, Tim Shoppa <tsho...@gmail.com> wrote: > Very nice report, Corby! > > When I was in grad school back in the 90's, doing vacuum pump work was a > very menial task usually assigned to grad students, so naturally I became > quite familiar with it :-). Especially cleaning up messes with decrepit old > experimental systems! > > I think back to those days and maintaining an already-functioning H-Maser > actually seems perfectly feasible in the long term. > > The tight geometry of the copper package of a H-Maser sure seems a lot more > feasible than the other atomic clocks which are way more hi-tech stuff. > That said, machining the copper would be way beyond my ability! > > I also did get to work some plasma physics experiments where we used > kettles - literally large industrial cooking kettles, with some hacked-in > brazed-shut machining for the various probes and plumbing. Maybe if there > was some way to homebrew a primitive H-Maser with that low level of > construction competence I could give it a try! > > Please share more tales/pics of your H-Maser experience! > > Tim N3QE > > On Mon, Jan 2, 2017 at 1:18 PM, <cdel...@juno.com> wrote: > > > Happy Birthday EFOS2 Maser! > > > > The EFOS2 active hydrogen Maser at my place just turned 34 years old! > > Pretty impressive reliability. > > It is an Oscilloquartz Maser, they are now called T4 Science. > > I know a guy in Norway that bought the refurbished EFOS3 Maser last > > year directly from T4 Science! It is 32 Years old! > > I have had the EFOS2 running here pretty much continuously since > > Sept 2007. > > I've had to refill the Hydrogen bottle 3 times. > > replaced ion pumps 4 times (requires a CLEAN vacuum pumping system) > > Had to repair one of the ion pump supplies (bad capacitor) > > Also removed original 1 transistor power oscillator that was used to > > drive the discharge providing the atomic Hydrogen. > > I replaced it with a custom class A oscillator amplifier. > > It uses an Oscilloquartz B5400 Quartz oscillator that has aged very > > little since 2007! > > > > Cheers, > > > > Corby Dawson > > > > _______________________________________________ > > 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. > _______________________________________________ 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.
